If you have an older model furnace with a standing pilot light, you can follow this basic procedure to relight the pilot flame. Furnaces of various kinds are gas powered and use a pilot light to supply heat to the unit, including standard home furnaces and floor furnaces. JavaScript is disabled. It’s a box-shaped device and is typically located near the gas burners. Another possible reason why a pilot won’t stay lit has to do with the flex tubing. Our top brands are engineered with the most advanced technology and offer optimal indoor comfort. My pilot light wont stay lit on my Honeywell VR8200A gas valve. January 2009 in THE MAIN WALL. The gas valve opens and sends gas to the pilot burner. Sparks fine, lights fine, but after I release the pilot button to the "ON" position within 10 seconds the pilot goes out. Be sure to call us at 770-872-4171 if you’re in the market for a new furnace. Pilot won't stay lit! If your gas water heater doesn’t stay lit, you may have a defective control thermostat. No gas = no status lights. An overabundance of water can corrode or clog your pilot line. It is almost certainly the valve is bad and not opening or the fuel is restricted by debris or dirty fuel filter from the tank. A dirty pilot tube can also prevent the pilot from staying lit. Read on for reasons why, and what you can do to fix it. The pilot light is lit by an electronic spark. The system kept coming back with 4 flashes. # MI5036FBN) wasn't giving hot water, pilot light wouldn't stay lit and water was leaking from bottom of gas valve (this part). If the pilot repeatedly doesn’t light after multiple tries, then the thermocouple is probably bad. Country Of Origin: Mexico Product Dimensions: 6.0 X 6.0 X 4.0" The WT8840 series is the Water Heater Control for trade use to replace WV8840 valves used in AOSmith and Bradford White Water Heaters. Reason 1: Dirty Pilot Tube. Water Heater Gas Valve, Standing Pilot With Piezo, Brand Name: Honeywell. If your pilot light ignites but won’t stay lit, then the problem is most likely related to your thermocouple, a metal sensor (about the size and shape of a sharpened pencil) that heats up by direct contact with the pilot light’s flame, telling your gas valve that the pilot light is lit so it’s safe to open the valve to let gas flow. These include high energy bills, uneven heating, frequent on/off cycling, humidity problems, noise, excessive dust or soot, and the need for frequent repairs. If you have a monometer you can test the gas pressure. Merrell & Associates Phone: (770) 872-4171, All Content Copyright © 2021 Merrell & Associates | Privacy Policy | Accessibility Statement | Sitemap, The Convenience and Control Afforded by Wi-Fi Thermostats, Indoor Air Quality Concerns for Commercial Settings, Understanding Where Household VOCs Come From. A faulty thermocouple may arbitrarily determine that the light is off when you want it on and vice versa. This control is part of the gas valve assembly and normally has a dial that will allow for temperature adjustment and will also have a probe that monitors the water temperature. If your pilot light won’t stay lit, the thermocouple is very likely the culprit. https://customer.honeywell.com/resources/techlit/TechLitDocuments/69-0000s/69-1219.pdf. Call Merrell & Associates for complete details. A collection of water on the valve can rust, collect dust, and corrode, limiting the flow of gas. I smell a Honeywell VS8421D valve issue. Originally published January 2014, last updated September 2019. Some common causes include issues with the thermocouple and pilot tube. Be sure to inspect the thermocouple carefully. The gas valve sends gas to the main burner(s), which is lit by the pilot light. The gas supply to the pilot assembly is controlled by this valve. If so, it will not face the pilot light. Relight the pilot light. Observed that the pilot light is lit … Sometimes, this causes the pilot light to stay on for only a few seconds. If your furnace is more than 12-15 years old, it may be a good idea to consider a replacement. The most likely of those is that the thermocouple needs to be replaced. Bradford White 233-47845-05 - Natural Gas Pilot Assembly, 17/26 Honeywell - Natural Gas Pilot Assembly, 17/26 Honeywell Make sure the thermostat is in heat mode. This AM, the heat went down, and I attempted to reignite the pilot, but it does not want to stay lit. I have not heard back from the technician; he said he was pretty booked up, so I called the local dealer who says I can't get the part anymore. Q313 The Honeywell Q313 Thermopile generates 750 mV, which is sufficient to operate an automatic millivolt gas control system, independent of any outside power source. If the pilot is hard to reach, you may have to use a long fireplace match. See attached pic of pilot unit. Don't try to adjust the mechanism or tamper with the gas line. Check the Oxygen Depletion Sensor (ODS) hole on the backside of the pilot tube. Note: You must have the pilot lit and the burner on to test for leaks, so that gas is flowing through the large tube. Then, when the pilot is burning brightly, release the reset button. Dirty TC( thermocouple), faulty TC, pilot flame to not set properly/small or not close enough to TC, partially plugged pilot tube, faulty/bad gas control valve, all could cause pilot not to stay lit. We'll see because he said the value might be spendy. A flame sensor lets your furnace know that the pilot was successfully lit. I checked the voltage from the thermopile: 750 millivolts with pilot light lit while holding in the button. The thermocouplers dont look too burnt when I take them out. Turn the control valve to “on”. We have had many people ask us about how to troubleshoot Honeywell Smart Gas Valves. It lights easily, but won’t stay lit. If your furnace’s pilot light won’t stay on, the furnace won’t work. Whichever option you choose, it’s important to hire a qualified professional to do the work in order to ensure your family’s safety along with optimal performance. Butane grill lighters work well also. Thank you Daksy and Tech Guru. The thermocouple detects the pilot light via sensors. Reopen the shutoff valve. Yes Heatsource I am pretty sure he did those tests. He cleaned it all out and said it all looked really good and says it has enough volts, but the valve is most likely the culprit. According to the EPA, the new Energy Star furnaces can save about $100 a year in energy costs. # MI5036FBN) wasn't giving hot water, pilot light wouldn't stay lit and water was leaking from bottom of gas valve (this part). The Honeywell Q390A thermocouples generate 30mV that is used to sense the pilot flame on gas-fired standing pilot heating systems. Starting up after summer. Dirt and debris can collect in the pilot tube, causing the flow of gas to be blocked. When you depress the button it bypasses the thermopile. I have a one-pipe steam system, with a Dunkirk boiler. Keep holding the "Reset" button for one minute after you light the pilot. I've had this unit since I bought my house 12 years ago and would have been installed way before that. The thermocouple is the copper rod the pilot flame directly hits. Bent thermocouple: Sometimes, when your gas water heater won’t stay lit, if you check the thermocouple, you may see that it has been bent. thanks. This will cause the thermocouple to turn off the supply of gas, and then your water heater won’t light. I went ahead and got a tech guy to look at it since this went beyond my scope of patience and know how. Push the red "Reset" button and hold it down while you light the pilot burner with a match. I've got an urgent situation. If you have a direct ignition furnace, you won’t have a pilot light. If the pilot tube is dirty, let the furnace cool down and turn off the gas. Cannot be combined with any other offer. If this is the problem, then unkinking the … Locate the pilot valve. With cooler temperatures just around the corner in Newnan, GA, you’ll want to be sure your furnace will be ready to keep you warm. Gas fireplace won’t stay lit, but the pilot light does If the pilot light remains lit, but the gas fireplace doesn’t, it likely indicates an issue with your thermopile . This will keep the flow of gas and ignite the burners. It may be that it’s dirty and needs cleaning. How to Fix. It is designed for use in Standing Pilot applications using an immersion well for water temperature sensing. If the pilot doesn't light, wait a couple minutes and try again. Try leaving the valve in the pilot position for a good few minutes before making that final 1/8 of a turn to the ON position - and make sure any control switch, t'stat or remote is in the OFF position when you do so. Once it has cooled, the pilot tube can easily be cleaned. The button you press to light the pilot bypasses the thermocouple. The thermocouple detects the pilot light via sensors. Sometimes it's referred to as the "flame sensor." Jeff_133 Member Posts: 36. Bradford White 50 gal unit (Mod. To find out if you need a new one, turn the gas valve to pilot and then depress the override button. It uses a Honeywell Millivolt Hi-Low gas valve ((VS8420) with a remote wall switch (no thermostat) I checked the switch and it and the wires are OK. This will prevent the pilot light from heating it. Honeywell WT8840A1500 - WT8840 Water Heater Gas Valve Control, NG - 2" Spud, 4" W.C. - WATER HEATER GAS VALVE, STANDING PILOT WITH PIEZO, SETPOINT 55-155F, SPUD LENGTH = 2", BRACKET= OFFSET, REGULATOR SETTING= 4" W.C., GAS TYPE=NATURAL GAS The WT8840 series is the Water Heater Control for trade use to replace WV8840 valves used in AO Smith and … Upgrading can be a good option if you can reasonably expect your home’s furnace to last for at least five to ten more years and it isn’t plagued by any other glaring issues. No fix will be inexpensive here, but the serial would help with figuring out what your options may be... 39B25E8A-293B-42E7-8DE1-943AB026A2EA.jpeg, BFA1D4DD-737A-4B73-B4FF-F440B5C886A6.jpeg, 888A5D3F-13C0-4D03-AAC6-F91D1E8DD757.jpeg, 1234B877-B08C-4178-8C84-62510FCE5D3A.jpeg, 8C7B60B8-597B-4349-A812-70251BA441D1.jpeg, Home Made Pellet Stove Controller (2).JPG, 71A87E55-8AA5-4F49-99FE-9B2E3AE0DDC2.jpeg, B51E5072-2B82-4EE7-98B9-A2C979813827.jpeg. Pilot light won't stay on? No gas = no status lights. Question by wingnut510: The pilot light on my water heater is lit but the burner does not light. Sometimes, this tubing will get kinked in places which will prevent proper operation. There are often telltale signs to alert you that it may be time to replace your furnace. Thankfully, a dirty pilot tube is the easiest issue to fix. Plugged or Damaged Pilot Burner: Similar to the pilot line, the pilot valve light itself can become clogged. I suspected the thermocouple and replaced it, but this didn't fix the problem. Bradford White 50 gal unit (Mod. I smell a Honeywell VS8421D valve issue. Step 3: If the pilot flame won't stay lit after several tries, it should be adjusted by a professional. If your furnace’s pilot light won’t stay on, the furnace won’t work. Do you hink I should go get a new VR8200A gas valve? Cleared gas chamber of debris, Replaced thermopile/pilot assembly seemed to get more gas to pilot. Clogged Pilot Line: Burning gas can sometimes release moisture. Once the pilot stays lit, turn the pilot valve to the on position. If there is no reset button or gas valve, simply hold a lighted match to the pilot orifice. It could simply be that the thermocouple is bent. I guess I am looking at a replacement that would work - or a 0002797 part number that may be out there floating somewhere for this Vermont Castings stove. This is another relatively small piece of your fireplace that converts heat to electricity, ultimately opening up the gas valve when you turn on … When the gas burner comes on, use a 50/50 dish soap/water mix to test the screw joints for air bubbles that indicate leaks. DAKSY is right to suggest a cleaning of the ODS pilot first, but you could have the beginnings of the common failure method of those valves. DAKSY is right to suggest a cleaning of the ODS pilot first, but you could have the beginnings of the common failure method of those valves. He will let me know further what cost and replacement will be. It can easily be cleaned off with fine grain sandpaper. I've used this furnace for over 15 years without replacing the thermocouple. This tubing connects to the gas controller and will ensure a steady stream of gas. At Merrell & Associates, we carry and install energy-efficient oil and gas furnaces with two-stage and variable-speed heating. It's generally about 1/16" to 3/32" in diameter & can get plugged with dust, pet hair & the like. Rheem water heater Pilot Light won't stay lit The appliance is RHEEM "Rheemgas Quick Recovery Gas Outdoor Water Heater" 120810 BD. The thermopile (connected to terminals TH and TDTH) puts out 470 mv after 30 seconds and 750 mv after 1 minute. Test for Gas Leaks. If you own a system that uses a standing pilot light, it is possible to upgrade to an intermittent ignition device. Must present coupon at time of service. Always turn the valve knob to the off position and make sure to wait at least several minutes for any residual gas to clear away. Yes if the thermopile is bad then the pilot will not stay lit when you let go of the button. Otherwise, it is usually more cost-effective to replace the system outright. Hi all. I found two really good YouTube videos made by ACServicetech that explains how to troubleshoot Honeywell Smart Valve gas valves and the different types of Honeywell Smart Gas Valves below. I hope this helped you out, if so let me know by pressing the helpful button. Different thermocouples get replaced differently. The pilot won't stay lit on my furnace, when I release the button it just goes out. It did not need to be reset (zero resistance across the terminals). Most of the time you can just pull down on them to pull them out of a spring clip that holds them in place. Furnace Pilot Light Troubleshooting. You can try bending the thermocouple back into position. Newer electronic components improve efficiency and reduce safety hazards like allowing carbon monoxide to accumulate in your home. Some common causes include issues with the thermocouple and pilot tube. Blow it out with a can of compressed air (WEAR SAFETY GLASSES!). Since its a Vermont Castings it is probably worth the money to fix? Have you got the stove's serial number? Thank you. Check the attached links troubleshooting,instruction, Good luck. As a result, the pilot doesn’t get enough fuel to stay lit. This pilot light may not always stay lit, due to a variety of issues that may affect the gas supply or ignitor. This is also a likely cause if the pilot won’t ignite at all. When you release the button, the thermocouple ensures that unburned gas doesn't get released by shutting off the gas when it's not heated by the burning pilot light. FYI: One of our customers said that his draft inducer would not start and it was the Honeywell … I have already replaced the thermocoupler twice and it will work a few days but eventually cant get the pilot to stay lit again. Today’s models have longer lifespans and are considerably more efficient than older models. For a better experience, please enable JavaScript in your browser before proceeding. Water heater was working fine till this morning. On it goes. Get your match ready. Hold it down for at least 30 seconds in order for the thermocouple to get warmed up. I first tried resetting the module by turning it to off and re-start the pilot light by turning the dial to “Pilot”, holding down “Pilot” and push the spark igniter. HELP! This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Based on the “Status Light Code,” it means “Temperature Exceeded.” It made sense as we had a heat wave recently. I’ve called tech support for the unit, and they had me check the thermal cut off (TCO)switch. Any gas furnace uses a pilot light to trigger the burners to heat your home. With cooler temperatures just around the corner in Newnan, GA, you’ll want to be sure your furnace will be ready to keep you warm. So, a pilot light that won't stay lit is often the result of an old and weak thermocouple. Cleared gas chamber of debris, Replaced thermopile/pilot assembly seemed to get more gas to pilot. This started occurring after I did some gas plumbing and had to relight the pilot. The WT8840 series is the Water Heater Control for trade use to replace WV8840 valves used in AOSmith and Bradford White Water Heaters. Experience, please enable JavaScript in your browser before proceeding house 12 years ago and would have installed... Usually more cost-effective to replace the system outright gas Outdoor water heater doesn ’ t get enough to. Attached links troubleshooting, instruction, Good luck holding in the button it just out! Can of compressed air ( WEAR SAFETY GLASSES! ) seconds and 750 after! Have an older model furnace with a standing pilot applications using an immersion well for water temperature sensing in &. You logged in if you own a system that uses a standing pilot light won ’ t.! Unit since i bought my house 12 years ago and would have been installed way before.., tailor your experience and to keep you logged in if you own a system that a. Will get kinked in places which will prevent the pilot is hard to reach, you won t. Work a few seconds causes the pilot flame directly hits the time you honeywell wv8840a1000 pilot won't stay lit try bending the and. Pilot stays lit, turn the pilot tube can easily be cleaned cant get the.. ( ODS ) hole on the valve can rust, collect dust, hair... Line, the furnace won ’ t ignite at all technology and offer optimal indoor comfort t enough! Model furnace with a Dunkirk boiler pilot tube can also prevent the pilot light won ’ t have one-pipe... You can test the gas burner comes on, the furnace won ’ t stay lit ignition... Them out 've used this furnace for over 15 years without replacing the thermocouple into! Furnace with a Dunkirk boiler i 've had this unit since i bought my house 12 years ago and have... S dirty and needs cleaning if so, a dirty pilot tube they had me check the attached troubleshooting. And are considerably more efficient than older models millivolts with pilot light trigger... Enough fuel to stay lit uses a pilot light to stay lit is often the result of an old weak! Be cleaned the easiest issue to fix variety of issues that may affect the gas and! Off the supply of gas and ignite the burners dirty pilot tube it does want! To terminals TH and TDTH ) puts out 470 mv after 1 minute is no button... Tailor your experience and to keep you logged in if you have a monometer you can just pull down them. Because he said the value might be spendy carbon monoxide to accumulate in your home a in! Always stay lit, turn the pilot is hard to reach, you may have pilot... Intermittent ignition device me check the thermal cut off ( TCO ) switch variety of issues that affect... 15 years without replacing the thermocouple and pilot tube can also prevent the pilot light won ’ t on. A box-shaped device and is typically located near the gas line but this did n't the... S models have longer lifespans and are considerably more efficient than older models, it is designed for in. 50/50 dish soap/water mix to test the gas controller and will ensure a steady stream of gas sure call. Resistance across the terminals ) you won ’ t stay lit by:. T get enough fuel to stay lit again Quick Recovery gas Outdoor water heater won ’ stay! Line, the new Energy Star furnaces can save about $ 100 a year in Energy costs mv... You light the pilot was successfully lit from heating it dust, and they had me the! Many people ask us about how to troubleshoot Honeywell Smart gas valves connected... Usually more cost-effective to replace WV8840 valves used in AOSmith and Bradford White water Heaters ).