dewalt propane heater troubleshooting
Allow heater to thoroughly cool before performing any maintenance. In case of defective thermal protection, you need to replace it with a new one. In your heater, propane is used to light the pilot light. Check the gas cylinder to make sure that there is enough propane and then make sure that the gas valve is in the on position. WHAT CAN WE HELP YOU FIND TODAY? In the majority of cases, these steps will get your unit working in no time. For instance, its near impossible to avoid draft issues when using a propane heater outdoors. It will burn off the soot and reduce the blowing of smoke. It even occurs if the outlet or plug is defective or damaged. Click here. Ruud vs. Goodman: Which Air Conditioner is Better? What is the smell coming out of my diesel heater? If the pilot won't stay lit, it may be because there's a draft, but more often it's a problem with the thermocouple. Then, use your pliers again to rotate and remove the retaining nut that holds the thermostat in place. Dewalt 20V Propane Heater DXH70CFAV Question : r/Dewalt - reddit However, if you are facing a short cycling issue, you should take help from a technician to inspect your system. No appointments. That's the sound of the electronic spark mechanism, and if you look into the burner chamber, you should be able to see the spark. Service & Support Product Registration A quick guide to troubleshooting RV furnace problems Propane heaters are reliable and effective ways to keep any area warm. Both of these require professional intervention. As the temperature rises, the propane in the tank is going to expand. Last but not least your propane heater might fail to work not because there is something wrong with the actual unit, but because of the weather conditions. Clean the fuel filter, air intake, and output hole and make sure there is no obstacle. Fireplacehubs.com is a participant in the Amazon Associates Program, Google Adsense, and Ezoic Ad Network. Please know our team is committed to supporting you and will connect with you soon. In that case, its usually because of insufficient gas supply, a malfunctioning thermostat, corroded flame sensors, or the flame sensor is off. INSTRUCTIVO DE OPERACION, CENTROS DE SERVICIO Y POLIZA, DE GARANTIA, ADVERTENCIA: LEASE ESTE INSTRUCTIVO ANTES, Lea y siga todas las instrucciones. Whether you are looking to sign up for the most cost-effective propane delivery plan or have a new propane tank installed, our professional and efficient staff can guide you through the process. The cordless configurator makes it easy: tool bodies, batteries, chargers, lights, lasers, vacuums, etc. : Discoloration and cracking are usually the first signs that you have a compromised flame sensor. Why Is My Propane Heater Not Working? Troubleshooting Guide Also, visually inspect the tank to make sure that there are no cracks or holes. The meter should read zero. For product information, registering a product, extending your warranty and other services, our helpful FAQ section below has the answers to your questions. Product Summary. Cookie Notice Either lack of fuel or too much fuel can be fixed fast with a bit of testing It's cable. Step 1: Turn Off the Gas Supply. Parts and Manuals - HeatStar by Enerco Most importantly, if the dirt accumulating from fuel and carbon blocks the nozzle passages, the air, and fuel flow gets reduced. Light the pilot light. Includes a 20' hose and regulator, and is manufactured with a large ergonomic handle and a split barrel design for easy maintenance. Remove disposable 1 lb. At times, you might even get a small nest out of the tube insects can live there during the summer months. Auto Body Protectants . If it reads less than 25 millivolts, the thermocouple is compromised and must be replaced. 100 lb (pound) minimum tank size. When this happens, the flame sensor may lose its flame sensitivity. Enerco Group recalls DeWALT cordless kerosene heaters If you see bubbles forming, then your tank has a leak and you should act immediately. Obviously I took it back the next day. Hopefully, you now know how to troubleshoot and fix most issues that may cause your propane heater not to stay lit. The towel will also wipe off excess water in the area. See ourPrivacy Policy or Contact Us by filling out this form, emailing us at support.dewalt@sbdinc.com or sending mail to 701 E. Joppa Road, Towson, Maryland. This is not difficult by any means, requiring some rubbing alcohol, a couple of Q-Tips, and a steady hand. TORPEDO HEATER TROUBLESHOOTING - WILL NOT LIGHT - FILLS SHOP - YouTube Now you can turn back the multimeter to volts. The Best Propane Heater Options of 2023 - Top Picks by Bob Vila View, print, and email tool schematics and manuals. If the thermocouple wears out, replacing it is a matter of unclipping the bulb, unscrewing the wire from the gas valve and reversing the procedure to install a new one. Flame signal should be at least .6 micro amps. Dewalt Propane Heater Troubleshooting [5 Easy Solutions] - FireplaceHubs Also, check the electrical wirings & fix them if necessary. Start off with closing the has supply completely. Our staff has decades of experience in the energy/heating industry and our technicians are certified to handle any problem you might have. Heater must have a good ground for proper ignition and flame sensor operation. If the heater sparks but doesn't light, the gas cylinder supplying the unit may be empty or the gas may be shut off. Avoid DIY as the electric spark system is extremely delicate. You can manually clean the thermocouple. Heres Why. DEWALT DCK283D2 20V MAX XR Brushless Cordless Drill, Impact Driver Tech-Tip for Kerosene Portable Heaters that are not firing - Mi-T-M Blog For added safety, choose a unit with an oxygen depletion sensor and tip-over automatic shut-off switch. Also, faulty or clogged air hoses can be the reason behind fuel splitting. After the pilot lights, continue holding the knob for around 30 seconds. But if you get that the fan doesnt start, then there is a wiring issue. This happens when the blade of the fan inside the heater is blocked. Fortunately, refilling an empty propane tank is a simple, straightforward process. Clear the area and call a team of professionals. Physical damage to any of these components may hinder the flame sensor. Problems with the Sensor Anytime your heater's pilot light will not stay lit, it is a good indication that the sensors on your heater are damaged or need to be replaced. 2019 Forced Air Propane 85-125k BTU Industrial Heater Schematic (Size: 174.5 KB) 2020 Forced Air Propane 35k BTU Industrial Heater Manual (Size: 2.8 MB) 2020 Forced Air Propane 35k BTU Industrial Heater Schematic (Size: 370.2 KB) 2020 HERO Cordless Forced Air Propane 35k BTU Heater Manual (Size: 5.1 MB) As a result, your heater will emit a bad odor and smoke. Sign up to receive the latest info on new DEWALT products, special offers and more. Ft. Capacity, Model# HA10G The thermocouple is a heat-sensitive device much like the one in the thermostat, and it's a safety measure that prevents the release of unburned gas. The gas regular controls the amount of gas entering your home from the main supply. This will give the thermocouple enough time to heat up. See ourPrivacy Policy or Contact Us by filling out this form, emailing us at support.dewalt@sbdinc.com or sending mail to 6275 Millcreek Drive, Mississauga, ON L5N 7K6, for more information. (610) 251-2203, 1432 S West End Blvd. As a result, the pressure inside the container will increase. The thermocouple could also be worn out, in which case it needs to be replaced. Based on your inputs, the builder will deliver a pdf list with images, descriptions, SKUs and quantities. Below, we discuss the main reasons why a propane heater may refuse to stay lit, along with probable solutions. 855-805-5745 www.DEWALT.com DXH80KTHC, DXH140KTHC, DXH210KTHCX SAVE THESE INSTRUCTIONS WARNING: READ INSTRUCTIONS CAREFULLY: Read and follow all instructions. by Response from Mr. Heater Product ExpertDec 30, 2022 Thank you for your review and feedback. If it's very. Now move the igniter over and unclog the flame areas of your heater. Interdisez quiconque n'ayant, pas lu les prsentes instructions d'assembler, d'ajuster. Venting issues often result from serious issues such as a cracked exchanger or blocked exhaust flue. COPYRIGHT 2023. If your tank is overfilled, the propane heater might fail to work. Conserve, estas instrucciones en un lugar seguro para futura, referencia. This component has a metal rod that is located close to the flame. If the furnace has been in use for a long time, it may be dead due to natural wear and tear. In addition, the heater not sparking, blowing smoke, and spitting fuel are also frequent issues. My only last thought is maybe the bottle had less propane and its out. A weak flame due to dirt buildup may not envelop the thermocouple completely, causing the flame sensor to return a negative answer. The problem may be a genuine defect or it could be an issue with the sensor. Similarly, if the blower motor is covered with dust or dirt, it cant work & may overheat. Check to be sure, and if there is still a problem carefully clean the gas valve using a needle. So, what could go wrong, and what can you do about the potential issues? The following are trademarks for one or more DEWALT power tools, accessories, anchors and concrete adhesives: The yellow and black color scheme; the D-shaped air intake grill; the array of pyramids on the handgrip; the kit box configuration; and the array of lozenge-shaped humps on the surface of the tool. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. Also, ensure the battery connection is correctly connected to the heaters original wiring set. Suppose theres something wrong with your propane heater that makes it shut off after just 5 minutes. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. It sends it again when the temperature falls below a preset value. Clean the air filter, heat exchanger, and combustion chamber of your Dewalt diesel heater. We take extensive measures to ensure all our products are made to the very highest standards and meet all relevant industry regulations. It would also impact actual heating. Torpedo Heater Keeps Shutting Off? (Possible Causes & Fixes) Use only propane gas. If you're looking for a little extra help on troubleshooting the system you purchased from Total Home Supply, call us with heater fix questions or if you need help locating a replacement part - 1.877.847.0050. If the pilot light is defective, replace it. Reddit and its partners use cookies and similar technologies to provide you with a better experience. This DEWALT portable heater gives you efficient heat wherever it is most needed. Shopping Options Price Brand The problem is often a clogged gas pipe, a standing pilot that flickers or goes out or an electronic spark that doesn't spark. Patented Quiet Burner Technology reduces combustion and operation noise by up to 50%. Plus, a dirty thermocouple, a distance thermocouple from the flame & blocked pilot tube are also responsible for not igniting issues. To deal with the Dewalt diesel heater problems, just follow our guide. Itll then automatically light the heater right away. What type of oil should I use with the DWS535/DWS535T and do you have an MSDS for it? However, if the metal rod fails to sense the flame, the gas line to the heater will be closed. By signing up you agree to receive emails from DEWALT with news, special offers, promotions and other information. The enclosure gets extremely hot when the air vents are blocked, or the motor is defective. Registering your purchase with MyDEWALT allows you to access information about warranty service, latest updates, rate and review your products. You can unsubscribe at any time. Dewalt Diesel Heater Problems [5 Easy Solutions]. Unfortunately, even a slight buildup can cause the thermocouple to malfunction the sensor simply wont be able to detect the flame. Features 3 USB ports for charging portable electronics, a powerful LED work light, and dual tank capability to keep you . In case of a dead battery, you need to change it. Do you have an SDS (MSDS) for DEWALT oil part number N040237? Read: No Hot Water In The House? Use our convenient locator to help you find your nearest authorized DEWALT service agent. Monkton, MD 21111 Give it some time to cool and then proceed with clearing off the dust from the external surfaces with a soft cloth. You can unsubscribe at any time. Contact us today to see how we can help you. If you have questions or comments, contact us. Well discuss more thermocouples later. An empty tank is bad, but an overfilled one can be just as problematic (and more dangerous). But if the issue is with the motor, you should purchase a new one and replace it with the older one. Plus burnt dust and insects inside heater creates bed smell. The pilot light can go on and off repeatedly for many reasons, including; The thermocouple, also known as the lame sensor, is a copper rod that determines the presence of a flame and allows or shuts off gas supply depending on the presence of a flame. Signs That Its Time to Service Your Propane Hot Water Heater, What is Proper Propane Tank Size For Me? Therefore, even a little dirt can block the gas passage, rendering the pilot ineffective. Below the defined point, the unit will go off until the pressure level is met. Dont use contaminated or bad fuel. It should be about one inch high and mostly blue. A thermocouple can break, or some of the wire may become loose. The pilot should be around an inch high and mostly colored blue. Propane heaters have sensitive controls to regulate gas flow and keep a room comfortable, but when one malfunctions, the fault is seldom with those controls, but with the gas or ignition system. You have to face overheating issues because of dirty or clogged air filters, which hinder sufficient air circulation. Tip: before removing the thermocouple, you can take a photo of the way everything is assembled inside the unit (just in case). Semi Pro Football Leagues In Alabama, Tjx Warehouse Jobs Memphis, Tn, Qvc Isaac Mizrahi Short Sleeve Tops, Uber Eats Driver Diamond Rewards, What Is Essentials On My Bank Statement, Articles D
Allow heater to thoroughly cool before performing any maintenance. In case of defective thermal protection, you need to replace it with a new one. In your heater, propane is used to light the pilot light. Check the gas cylinder to make sure that there is enough propane and then make sure that the gas valve is in the on position. WHAT CAN WE HELP YOU FIND TODAY? In the majority of cases, these steps will get your unit working in no time. For instance, its near impossible to avoid draft issues when using a propane heater outdoors. It will burn off the soot and reduce the blowing of smoke. It even occurs if the outlet or plug is defective or damaged. Click here. Ruud vs. Goodman: Which Air Conditioner is Better? What is the smell coming out of my diesel heater? If the pilot won't stay lit, it may be because there's a draft, but more often it's a problem with the thermocouple. Then, use your pliers again to rotate and remove the retaining nut that holds the thermostat in place. Dewalt 20V Propane Heater DXH70CFAV Question : r/Dewalt - reddit However, if you are facing a short cycling issue, you should take help from a technician to inspect your system. No appointments. That's the sound of the electronic spark mechanism, and if you look into the burner chamber, you should be able to see the spark. Service & Support Product Registration A quick guide to troubleshooting RV furnace problems Propane heaters are reliable and effective ways to keep any area warm. Both of these require professional intervention. As the temperature rises, the propane in the tank is going to expand. Last but not least your propane heater might fail to work not because there is something wrong with the actual unit, but because of the weather conditions. Clean the fuel filter, air intake, and output hole and make sure there is no obstacle. Fireplacehubs.com is a participant in the Amazon Associates Program, Google Adsense, and Ezoic Ad Network. Please know our team is committed to supporting you and will connect with you soon. In that case, its usually because of insufficient gas supply, a malfunctioning thermostat, corroded flame sensors, or the flame sensor is off. INSTRUCTIVO DE OPERACION, CENTROS DE SERVICIO Y POLIZA, DE GARANTIA, ADVERTENCIA: LEASE ESTE INSTRUCTIVO ANTES, Lea y siga todas las instrucciones. Whether you are looking to sign up for the most cost-effective propane delivery plan or have a new propane tank installed, our professional and efficient staff can guide you through the process. The cordless configurator makes it easy: tool bodies, batteries, chargers, lights, lasers, vacuums, etc. : Discoloration and cracking are usually the first signs that you have a compromised flame sensor. Why Is My Propane Heater Not Working? Troubleshooting Guide Also, visually inspect the tank to make sure that there are no cracks or holes. The meter should read zero. For product information, registering a product, extending your warranty and other services, our helpful FAQ section below has the answers to your questions. Product Summary. Cookie Notice Either lack of fuel or too much fuel can be fixed fast with a bit of testing It's cable. Step 1: Turn Off the Gas Supply. Parts and Manuals - HeatStar by Enerco Most importantly, if the dirt accumulating from fuel and carbon blocks the nozzle passages, the air, and fuel flow gets reduced. Light the pilot light. Includes a 20' hose and regulator, and is manufactured with a large ergonomic handle and a split barrel design for easy maintenance. Remove disposable 1 lb. At times, you might even get a small nest out of the tube insects can live there during the summer months. Auto Body Protectants . If it reads less than 25 millivolts, the thermocouple is compromised and must be replaced. 100 lb (pound) minimum tank size. When this happens, the flame sensor may lose its flame sensitivity. Enerco Group recalls DeWALT cordless kerosene heaters If you see bubbles forming, then your tank has a leak and you should act immediately. Obviously I took it back the next day. Hopefully, you now know how to troubleshoot and fix most issues that may cause your propane heater not to stay lit. The towel will also wipe off excess water in the area. See ourPrivacy Policy or Contact Us by filling out this form, emailing us at support.dewalt@sbdinc.com or sending mail to 701 E. Joppa Road, Towson, Maryland. This is not difficult by any means, requiring some rubbing alcohol, a couple of Q-Tips, and a steady hand. TORPEDO HEATER TROUBLESHOOTING - WILL NOT LIGHT - FILLS SHOP - YouTube Now you can turn back the multimeter to volts. The Best Propane Heater Options of 2023 - Top Picks by Bob Vila View, print, and email tool schematics and manuals. If the thermocouple wears out, replacing it is a matter of unclipping the bulb, unscrewing the wire from the gas valve and reversing the procedure to install a new one. Flame signal should be at least .6 micro amps. Dewalt Propane Heater Troubleshooting [5 Easy Solutions] - FireplaceHubs Also, check the electrical wirings & fix them if necessary. Start off with closing the has supply completely. Our staff has decades of experience in the energy/heating industry and our technicians are certified to handle any problem you might have. Heater must have a good ground for proper ignition and flame sensor operation. If the heater sparks but doesn't light, the gas cylinder supplying the unit may be empty or the gas may be shut off. Avoid DIY as the electric spark system is extremely delicate. You can manually clean the thermocouple. Heres Why. DEWALT DCK283D2 20V MAX XR Brushless Cordless Drill, Impact Driver Tech-Tip for Kerosene Portable Heaters that are not firing - Mi-T-M Blog For added safety, choose a unit with an oxygen depletion sensor and tip-over automatic shut-off switch. Also, faulty or clogged air hoses can be the reason behind fuel splitting. After the pilot lights, continue holding the knob for around 30 seconds. But if you get that the fan doesnt start, then there is a wiring issue. This happens when the blade of the fan inside the heater is blocked. Fortunately, refilling an empty propane tank is a simple, straightforward process. Clear the area and call a team of professionals. Physical damage to any of these components may hinder the flame sensor. Problems with the Sensor Anytime your heater's pilot light will not stay lit, it is a good indication that the sensors on your heater are damaged or need to be replaced. 2019 Forced Air Propane 85-125k BTU Industrial Heater Schematic (Size: 174.5 KB) 2020 Forced Air Propane 35k BTU Industrial Heater Manual (Size: 2.8 MB) 2020 Forced Air Propane 35k BTU Industrial Heater Schematic (Size: 370.2 KB) 2020 HERO Cordless Forced Air Propane 35k BTU Heater Manual (Size: 5.1 MB) As a result, your heater will emit a bad odor and smoke. Sign up to receive the latest info on new DEWALT products, special offers and more. Ft. Capacity, Model# HA10G The thermocouple is a heat-sensitive device much like the one in the thermostat, and it's a safety measure that prevents the release of unburned gas. The gas regular controls the amount of gas entering your home from the main supply. This will give the thermocouple enough time to heat up. See ourPrivacy Policy or Contact Us by filling out this form, emailing us at support.dewalt@sbdinc.com or sending mail to 6275 Millcreek Drive, Mississauga, ON L5N 7K6, for more information. (610) 251-2203, 1432 S West End Blvd. As a result, the pressure inside the container will increase. The thermocouple could also be worn out, in which case it needs to be replaced. Based on your inputs, the builder will deliver a pdf list with images, descriptions, SKUs and quantities. Below, we discuss the main reasons why a propane heater may refuse to stay lit, along with probable solutions. 855-805-5745 www.DEWALT.com DXH80KTHC, DXH140KTHC, DXH210KTHCX SAVE THESE INSTRUCTIONS WARNING: READ INSTRUCTIONS CAREFULLY: Read and follow all instructions. by Response from Mr. Heater Product ExpertDec 30, 2022 Thank you for your review and feedback. If it's very. Now move the igniter over and unclog the flame areas of your heater. Interdisez quiconque n'ayant, pas lu les prsentes instructions d'assembler, d'ajuster. Venting issues often result from serious issues such as a cracked exchanger or blocked exhaust flue. COPYRIGHT 2023. If your tank is overfilled, the propane heater might fail to work. Conserve, estas instrucciones en un lugar seguro para futura, referencia. This component has a metal rod that is located close to the flame. If the furnace has been in use for a long time, it may be dead due to natural wear and tear. In addition, the heater not sparking, blowing smoke, and spitting fuel are also frequent issues. My only last thought is maybe the bottle had less propane and its out. A weak flame due to dirt buildup may not envelop the thermocouple completely, causing the flame sensor to return a negative answer. The problem may be a genuine defect or it could be an issue with the sensor. Similarly, if the blower motor is covered with dust or dirt, it cant work & may overheat. Check to be sure, and if there is still a problem carefully clean the gas valve using a needle. So, what could go wrong, and what can you do about the potential issues? The following are trademarks for one or more DEWALT power tools, accessories, anchors and concrete adhesives: The yellow and black color scheme; the D-shaped air intake grill; the array of pyramids on the handgrip; the kit box configuration; and the array of lozenge-shaped humps on the surface of the tool. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. Also, ensure the battery connection is correctly connected to the heaters original wiring set. Suppose theres something wrong with your propane heater that makes it shut off after just 5 minutes. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. It sends it again when the temperature falls below a preset value. Clean the air filter, heat exchanger, and combustion chamber of your Dewalt diesel heater. We take extensive measures to ensure all our products are made to the very highest standards and meet all relevant industry regulations. It would also impact actual heating. Torpedo Heater Keeps Shutting Off? (Possible Causes & Fixes) Use only propane gas. If you're looking for a little extra help on troubleshooting the system you purchased from Total Home Supply, call us with heater fix questions or if you need help locating a replacement part - 1.877.847.0050. If the pilot light is defective, replace it. Reddit and its partners use cookies and similar technologies to provide you with a better experience. This DEWALT portable heater gives you efficient heat wherever it is most needed. Shopping Options Price Brand The problem is often a clogged gas pipe, a standing pilot that flickers or goes out or an electronic spark that doesn't spark. Patented Quiet Burner Technology reduces combustion and operation noise by up to 50%. Plus, a dirty thermocouple, a distance thermocouple from the flame & blocked pilot tube are also responsible for not igniting issues. To deal with the Dewalt diesel heater problems, just follow our guide. Itll then automatically light the heater right away. What type of oil should I use with the DWS535/DWS535T and do you have an MSDS for it? However, if the metal rod fails to sense the flame, the gas line to the heater will be closed. By signing up you agree to receive emails from DEWALT with news, special offers, promotions and other information. The enclosure gets extremely hot when the air vents are blocked, or the motor is defective. Registering your purchase with MyDEWALT allows you to access information about warranty service, latest updates, rate and review your products. You can unsubscribe at any time. Dewalt Diesel Heater Problems [5 Easy Solutions]. Unfortunately, even a slight buildup can cause the thermocouple to malfunction the sensor simply wont be able to detect the flame. Features 3 USB ports for charging portable electronics, a powerful LED work light, and dual tank capability to keep you . In case of a dead battery, you need to change it. Do you have an SDS (MSDS) for DEWALT oil part number N040237? Read: No Hot Water In The House? Use our convenient locator to help you find your nearest authorized DEWALT service agent. Monkton, MD 21111 Give it some time to cool and then proceed with clearing off the dust from the external surfaces with a soft cloth. You can unsubscribe at any time. Contact us today to see how we can help you. If you have questions or comments, contact us. Well discuss more thermocouples later. An empty tank is bad, but an overfilled one can be just as problematic (and more dangerous). But if the issue is with the motor, you should purchase a new one and replace it with the older one. Plus burnt dust and insects inside heater creates bed smell. The pilot light can go on and off repeatedly for many reasons, including; The thermocouple, also known as the lame sensor, is a copper rod that determines the presence of a flame and allows or shuts off gas supply depending on the presence of a flame. Signs That Its Time to Service Your Propane Hot Water Heater, What is Proper Propane Tank Size For Me? Therefore, even a little dirt can block the gas passage, rendering the pilot ineffective. Below the defined point, the unit will go off until the pressure level is met. Dont use contaminated or bad fuel. It should be about one inch high and mostly blue. A thermocouple can break, or some of the wire may become loose. The pilot should be around an inch high and mostly colored blue. Propane heaters have sensitive controls to regulate gas flow and keep a room comfortable, but when one malfunctions, the fault is seldom with those controls, but with the gas or ignition system. You have to face overheating issues because of dirty or clogged air filters, which hinder sufficient air circulation. Tip: before removing the thermocouple, you can take a photo of the way everything is assembled inside the unit (just in case).

Semi Pro Football Leagues In Alabama, Tjx Warehouse Jobs Memphis, Tn, Qvc Isaac Mizrahi Short Sleeve Tops, Uber Eats Driver Diamond Rewards, What Is Essentials On My Bank Statement, Articles D

dewalt propane heater troubleshooting