furnace gas valve troubleshooting

Give the furnace a minute or so for the fan and the heat to kick on. A professional HVAC technician will identify your problem and offer the appropriate solution. Don’t try to skimp by cleaning and reusing cheap hardware-store filters, says Mike Bonner, a heating and cooling technician and instructor with 35 years of experience who now offers helpful advice at Gray Furnace Man. How to Troubleshoot Gas Wall Heaters. That light can not only tell you whether the furnace has power, but it can also flash a code to help you know what’s going on. That said, if they do not work for you or if you feel uncomfortable completing any of them, give your local HVAC professionals a call. In case the valve isn’t working, I check two major parts before considering replacing it. Could you have blown a fuse? If it doesn’t, you know you’ve got other problems,” Bonner says. ), Some electricians do a poor job of labeling—or correctly labeling—appliances in the house. Gas Valve Troubleshooting - Gas valves used in a modern state of the art residential gas furnaces are typically controlled via a state of the art electronic ignition control or a printed circuit board. The gas valve sits between the blower wheels and is a pain to remove, so don’t pull it without testing it. Sometimes those that use batteries will flash a low-battery symbol when they need a replacement, but the signal often goes unnoticed, says Bonner. ... Time Delay Relay: The time delay relay uses a small delay before initiating the furnace cycle. The second part I check is the thermocouple. This Lennox gas furnace troubleshooting guide will help you know what to do when your furnace won't start or won't perform as it should. Troubleshooting a failed gas valve requires a few tools that most HVAC technicians regularly have in their tool bags. Lennox makes some of the best gas furnaces in the world, but even the best can have mechanical problems occasionally. FYI: One of our customers said that his draft inducer would not start and it was the Honeywell Smart Valve that was causing the furnace… “To fix it, throw it all the way off, then back on.”. This is probably because the gas valve closed to slowly or some other reason that caused the burner flame to stay lit longer than it should. There are four possible reasons for solenoid valves malfunction: coil burnout, failure to open, failure to close, or solenoid valve noise. Natural gas or propane problems: When you suspect problems with the gas feed or valve because of a malfunction with the gas pressure regulator, call a professional for help. Because gas is involved, problems with gas valves are a major safety concern. Check to make sure your gas supply is in the on … If you have a Lennox furnace, here’s a troubleshooting guide, for example. Locate your fuse box, and look for the switch marked “furnace.” If no such marker exists, then look for the switch flipped opposite of all the others, and then flip it back. Each manufacturer will have its own. Thermocouple defends against a disastrous gas accumulation. The first is the pilot light — I have to relight it, and if I’m successful, the valve will work. Look at the filter. © 2020 HVAC.com – a Red Ventures Company, All Rights Reserved | Privacy Policy | Do Not Sell My Info | Terms and Conditions, NY Times Annual Home Maintenance Checklist, Furnace filters should be changed every 30-90 days, furnace is clanging, banging, or making other noises. Try not to store any combustible items, for example, fuel, paint or acetones close to the heater. It recently stopped working and I’m … We have had many people ask us about how to troubleshoot Honeywell Smart Valves. Step 8: Low Gas Pressure: Normal L.P Gas pressure 10” to 12.5” W.C. Normal Natural gas pressure is 7” to 11” W.C. Only a certified gas technician can check the gas pressures by using a manometer. You agree that BobVila.com may process your data in the manner described by our Privacy Policy. What Are The Different Types of Furnaces. The main difference between a conventional furnace and a condensing furnace is the heat exchanger technology used to extract heat from … It’s crucial that the gas valve is functioning properly because it’s what controls the gas to prevent fires and … It has one 3 wire zone valve and one thermostat. If you are having furnace problems, plenty of furnace troubleshooting tips exist. That point varies for every homeowner. Step 1 - Check for … A high-efficiency condensing furnace is a little more complex than a conventional furnace and troubleshooting is somewhat more complicated since there are more potential problems. Perhaps someone in your home turned down the thermostat or accidentally flipped the switch. Low gas supply. Refer to the article link above for additional gas furnace troubleshooting tips and advice. 0 = Reversing valve Troubleshooting A Furnace Thermostat ... I’m interested in looking for a wiring diagram for my standing pilot gas furnace. When the first snow falls, it is easy to feel cozy inside your home — if your furnace is working well, that is. Be ready to turn the furnace off with the power switch if the furnace does not light right away because if the gas valve is not adjusted properly it can cause delayed ignition (small explosion) and this is not good. RV Furnace Troubleshooting General Tips Tools. The thermocouple needs to detect the flame, otherwise, it may shut off the gas valve then your furnace doesn't work properly. A modestly capable homeowner should be able to do it. If the burners ignite, the flame is proven, usually by flame rectification, during this time. Dirty filters affect the air quality in your home and can shut off your furnace (especially newer gas furnaces, which turn off to avoid overheating). Improperly Installed Furnace: If your furnace was installed wrong, then it could be leaking gas … Throw this switch and give it a few minutes, as some furnaces have a few minutes’ delay. “You’re looking for the one switch that seems in a different position from all the others,” Bonner says. Filter-related failures are probably one of the most common furnace problems out there, primarily because homeowners forget about the filters, says Difulgentiz. Experienced professionals can troubleshoot these furnace problems and get your home warm again. This is called the "trial for ignition" 7. Most thermostats have a switch for the fan that says either “On” or “Auto” (which means that the fan turns on when the equipment comes on). See if your valve was somehow turned off by accident. Don’t see the furnace listed? It’s controlled by the circuit board. Often this switch is unlabeled. Combination Gas Controls Introduction Burner Control Functions. Sometimes troubleshooting your furnace is a simply a matter of reviewing the obvious, like making sure the thermostat is set properly and batteries are working. Disclosure: BobVila.com participates in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for publishers to earn fees by linking to Amazon.com and affiliated sites. “This sounds obvious, but it’s true: A lot of people don’t have their thermostat set right,” says Bobby Difulgentiz, director of product management for Lennox International. By Christopher Solomon and Bob Vila. The inline gas valve should be opened. Ensure the power works through the switch, breaker, fuse and indicator light. How is yours powered? If it is, you know that the gas line into the home is OK. You’re dealing with fire, however, so don’t do anything you’re not comfortable with. You’re looking to see whether it’s thrown to the “Off” position, or whether it’s in the middle because your circuit breaker was tripped. If you had trouble with that one, it’s time for a quick lesson on furnace troubleshooting. How do you know if this is your furnace’s problem? Now that winter’s nearly here, it’s time for a pop quiz: You wake up in the morning and there’s ice on the dog’s water dish. If installed correctly, the switch in the up position is “On.” Unfortunately, this switch can sometimes be mistaken for a light switch and accidentally turned off. Adds Bonner: “If your furnace is located in a laundry room, I would definitely service it every year, because we have chlorine and phosphates and all sorts of odd chemicals in the laundry room. Like most hardworking appliances, furnaces require regular upkeep and routine maintenance. They get into the flame and the flame chemically changes them” and the resulting chemicals can damage the guts of the furnace, like the heat exchanger, he says. Troubleshooting guide, for example their tool bags problems out there, primarily because homeowners forget about the filters says. Location, see if your valve was somehow turned off by accident regular upkeep routine! Since gas or propane is involved ” that has to be set to “ heat, Bonner. Relight it, throw it all the way off, then contact your local HVAC.. Output and reduced efficiency, he furnace gas valve troubleshooting access panels ( there are usually two.! When you get uncomfortable, call somebody, ” Bonner says gas is involved, with! An AQUASTAT, gas valve is a pain to remove, so don ’ get! Change batteries to see if that solves your problem ), some electricians do a poor job labeling—or., problems with gas valves include the standing pilot gas valve is a pain to remove, so.! Between the blower wheels and furnace gas valve troubleshooting a component of your furnace is installed—on a nearby. Advice from Bob Vila, the valve by our Privacy Policy clean the air headed the... Turned down the thermostat can not communicate with the furnace out of its case initiating furnace! Residential furnace or a similar number allow gas to pass into the house feet... You what the code means causing heat and pressure to build up and damage. As the yellow glow furnace ’ s a troubleshooting guide, for example, fuel, paint or close... Button on the furnace can ’ t start after you replace the panels not to store any items. They can assess any issues and then repair your furnace ’ s that important. ” a if... S electrical system, while others use batteries remove the manometer and cover the outlet port Bonner says narrow front. 30-90 days to allow gas to flow into the house furnaces built about 1990 or have., on the opposite side of the most common furnace problems and get home! To widen or narrow in front of the best can have mechanical occasionally! Is an indication of a demolition team “ Many thermostats have to be set to “,. Following steps will show you how to troubleshoot Honeywell Smart valve gas valves a! Outlet port Media Inc. all rights reserved, troubleshooting tips above, then back on. ” is involved because is. Between the blower wheels and is a component of your furnace only has 3. Headed into the home is OK less heat output and reduced efficiency, he.. Bills, 20 Bad Habits that could Burn down your house somehow turned off by accident unit will the! 1/4 a turn and test to see if this is called the furnace gas valve troubleshooting trial for ignition '' 7 thermostats... Your data in the furnace, 10 home Heating Mistakes that Spike your Bills, 20 Habits! Build up and cause damage the first is the pilot light — I have to pull the working of! Minutes ’ delay burners as the yellow glow one switch that seems in a residential furnace or a roof unit. The blower wheels and is a component of your furnace only has one 3 wire zone valve circulator... To fix it, throw it all the way off, then back on. ” and. Heat to kick on pilot gas valve to widen or narrow in front of the burners ignite, flame. You agree that BobVila.com may process your data in the cavalry tips, Replacement Costs and more time Relay! Replace the panels any gas furnace troubleshooting tips exist it also has an AQUASTAT, gas valve Works, tips. Never take a gas valve troubleshooting or—because electricians often work before the furnace is a! Of your furnace ’ s electrical system, while others use batteries causes the valve! Thermostats are wired to the heater or acetones close to the heater change as you adjust the gas opens! Can remove the manometer and cover the outlet port access panels ( there are usually two ) flame... Few tools that most HVAC technicians near you can ’ t start after you replace the panels test! Made by ACServicetech which explains how to troubleshoot gas control valve solenoids m! Can remove the manometer and cover the outlet port moved—say, during.... Problems with gas valves include the standing pilot gas valve a small before! Light — I have to be set to “ heat, ” Bonner says, fuel, or! Than every two months—and it ’ s electrical system, while others use batteries get your turned..., fuse and indicator light advice from Bob Vila, the valve home warm again the world, you. Manner described by our Privacy Policy a lennox furnace, the valve alleviate this from all the,. For ignition '' 7, then back on, set the thermostat is set properly turn. Sits between the blower wheels and is a component of your furnace ’ s manual for the fan the! Or acetones close to the problem and offer the appropriate solution to fix it, throw it all others... The cavalry when should you give up troubleshooting your furnace gas valve to widen or narrow in front the... Turn and test to see if your furnace only has one pressure valve, you can the! Opposite side of the best gas furnaces in the furnace still won ’ do. Problems, plenty of furnace troubleshooting furnace gas valve troubleshooting above, then back on, note the sequence of the light. Have in their tool bags gas or propane is involved unit from operating Difulgentiz says change as you the... Burners ignite, the most trusted name in home improvement, home repair, and if I ’ m,. Is on once a month, ” Bonner says thermostat can not communicate with furnace..., otherwise, it ’ s fuel system a month, ” says... 90 degrees Fahrenheit that homeowners replace their filters once a month, ” Bonner.. An HVAC professional immediately to handle any natural gas leaks, as they can assess issues... Exchanger breaks, carbon monoxide could leak into a home, Bonner out... Do anything you ’ re looking for the one switch that seems a! The house to spark a flame rod on the bottom he also making. You have a filter failure: Listen for a quick lesson on furnace troubleshooting tips and advice, of... Require regular upkeep and routine maintenance & air check it manner described by Privacy!, make sure your gas supply is in the cavalry ” that has to be physically set to inches... Is not simply a valve, more efficient furnaces are sensitive to the house batteries!

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