A faulty thermocouple may arbitrarily determine that the light is off when you want it on and vice versa. If you have a direct ignition furnace, you won’t have a pilot light. Don't try to adjust the mechanism or tamper with the gas line. Starting up after summer. Cleared gas chamber of debris, Replaced thermopile/pilot assembly seemed to get more gas to pilot. 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. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. 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. Sometimes, this causes the pilot light to stay on for only a few seconds. A dirty pilot tube can also prevent the pilot from staying lit. Pilot light won't stay on? If there is no reset button or gas valve, simply hold a lighted match to the pilot orifice. Some common causes include issues with the thermocouple and pilot tube. We have had many people ask us about how to troubleshoot Honeywell Smart Gas Valves. Step 3: If the pilot flame won't stay lit after several tries, it should be adjusted by a professional. No gas = no status lights. Reason 1: Dirty Pilot Tube. The gas valve sends gas to the main burner(s), which is lit by the pilot light. This is also a likely cause if the pilot won’t ignite at all. Hi all. If this is the problem, then unkinking the … Thank you Daksy and Tech Guru. According to the EPA, the new Energy Star furnaces can save about $100 a year in energy costs. How to Fix. 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. My pilot light wont stay lit on my Honeywell VR8200A gas valve. Once it has cooled, the pilot tube can easily be cleaned. 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. 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. At Merrell & Associates, we carry and install energy-efficient oil and gas furnaces with two-stage and variable-speed heating. Note: You must have the pilot lit and the burner on to test for leaks, so that gas is flowing through the large tube. Pilot won't stay lit! Jeff_133 Member Posts: 36. 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. This pilot light may not always stay lit, due to a variety of issues that may affect the gas supply or ignitor. The thermopile (connected to terminals TH and TDTH) puts out 470 mv after 30 seconds and 750 mv after 1 minute. This is another relatively small piece of your fireplace that converts heat to electricity, ultimately opening up the gas valve when you turn on … This will prevent the pilot light from heating it. If the pilot repeatedly doesn’t light after multiple tries, then the thermocouple is probably bad. On it goes. 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. January 2009 in THE MAIN WALL. Turn the control valve to “on”. 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 . The pilot won't stay lit on my furnace, when I release the button it just goes out. The most likely of those is that the thermocouple needs to be replaced. I’ve called tech support for the unit, and they had me check the thermal cut off (TCO)switch. I suspected the thermocouple and replaced it, but this didn't fix the problem. If you own a system that uses a standing pilot light, it is possible to upgrade to an intermittent ignition device. He will let me know further what cost and replacement will be. Question by wingnut510: The pilot light on my water heater is lit but the burner does not light. There are often telltale signs to alert you that it may be time to replace your furnace. 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. 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 … Call Merrell & Associates for complete details. Must present coupon at time of service. When you depress the button it bypasses the thermopile. 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. If you have an older model furnace with a standing pilot light, you can follow this basic procedure to relight the pilot flame. Butane grill lighters work well also. I hope this helped you out, if so let me know by pressing the helpful button. 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. To find out if you need a new one, turn the gas valve to pilot and then depress the override button. Have you got the stove's serial number? Newer electronic components improve efficiency and reduce safety hazards like allowing carbon monoxide to accumulate in your home. Hold it down for at least 30 seconds in order for the thermocouple to get warmed up. HELP! No gas = no status lights. If the pilot doesn't light, wait a couple minutes and try again. This started occurring after I did some gas plumbing and had to relight the pilot. Dirt and debris can collect in the pilot tube, causing the flow of gas to be blocked. An overabundance of water can corrode or clog your pilot line. 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. The gas valve opens and sends gas to the pilot burner. It lights easily, but won’t stay lit. Bradford White 233-47845-05 - Natural Gas Pilot Assembly, 17/26 Honeywell - Natural Gas Pilot Assembly, 17/26 Honeywell Locate the pilot valve. The thermocouple detects the pilot light via sensors. I smell a Honeywell VS8421D valve issue. # MI5036FBN) wasn't giving hot water, pilot light wouldn't stay lit and water was leaking from bottom of gas valve (this part). 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. FYI: One of our customers said that his draft inducer would not start and it was the Honeywell … JavaScript is disabled. It’s a box-shaped device and is typically located near the gas burners. If your pilot light won’t stay lit, the thermocouple is very likely the culprit. It can easily be cleaned off with fine grain sandpaper. This tubing connects to the gas controller and will ensure a steady stream of gas. The thermocouplers dont look too burnt when I take them out. The thermocouple detects the pilot light via sensors. Yes Heatsource I am pretty sure he did those tests. So, a pilot light that won't stay lit is often the result of an old and weak thermocouple. Be sure to call us at 770-872-4171 if you’re in the market for a new furnace. I have a one-pipe steam system, with a Dunkirk boiler. Cannot be combined with any other offer. If your furnace is more than 12-15 years old, it may be a good idea to consider a replacement. 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. Thank you. See attached pic of pilot unit. 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. Some common causes include issues with the thermocouple and pilot tube. Blow it out with a can of compressed air (WEAR SAFETY GLASSES!). If the pilot is hard to reach, you may have to use a long fireplace match. The thermocouple is the copper rod the pilot flame directly hits. Otherwise, it is usually more cost-effective to replace the system outright. Plugged or Damaged Pilot Burner: Similar to the pilot line, the pilot valve light itself can become clogged. A flame sensor lets your furnace know that the pilot was successfully lit. Bradford White 50 gal unit (Mod. Our top brands are engineered with the most advanced technology and offer optimal indoor comfort. Check the attached links troubleshooting,instruction, Good luck. Water Heater Gas Valve, Standing Pilot With Piezo, Brand Name: Honeywell. Sparks fine, lights fine, but after I release the pilot button to the "ON" position within 10 seconds the pilot goes out. We'll see because he said the value might be spendy. Furnace Pilot Light Troubleshooting. Any gas furnace uses a pilot light to trigger the burners to heat your home. 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. I've used this furnace for over 15 years without replacing the thermocouple. If so, it will not face the pilot light. As a result, the pilot doesn’t get enough fuel to stay lit. 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. The Honeywell Q390A thermocouples generate 30mV that is used to sense the pilot flame on gas-fired standing pilot heating systems. 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. Clogged Pilot Line: Burning gas can sometimes release moisture. The button you press to light the pilot bypasses the thermocouple. Observed that the pilot light is lit … 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. 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. Keep holding the "Reset" button for one minute after you light the pilot. Check the Oxygen Depletion Sensor (ODS) hole on the backside of the pilot tube. Sometimes, this tubing will get kinked in places which will prevent proper operation. The gas supply to the pilot assembly is controlled by this valve. 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. If you have a monometer you can test the gas pressure. Test for Gas Leaks. 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. 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. Rheem water heater Pilot Light won't stay lit The appliance is RHEEM "Rheemgas Quick Recovery Gas Outdoor Water Heater" 120810 BD. Water heater was working fine till this morning. Reopen the shutoff valve. I went ahead and got a tech guy to look at it since this went beyond my scope of patience and know how. I have already replaced the thermocoupler twice and it will work a few days but eventually cant get the pilot to stay lit again. If the pilot tube is dirty, let the furnace cool down and turn off the gas. Make sure the thermostat is in heat mode. It is designed for use in Standing Pilot applications using an immersion well for water temperature sensing. 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. I checked the voltage from the thermopile: 750 millivolts with pilot light lit while holding in the button. It's generally about 1/16" to 3/32" in diameter & can get plugged with dust, pet hair & the like. Sometimes it's referred to as the "flame sensor." 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. I've had this unit since I bought my house 12 years ago and would have been installed way before that. These include high energy bills, uneven heating, frequent on/off cycling, humidity problems, noise, excessive dust or soot, and the need for frequent repairs. Originally published January 2014, last updated September 2019. Push the red "Reset" button and hold it down while you light the pilot burner with a match. This will cause the thermocouple to turn off the supply of gas, and then your water heater won’t light. Then, when the pilot is burning brightly, release the reset button. You can try bending the thermocouple back into position. I smell a Honeywell VS8421D valve issue. thanks. Relight the pilot light. Based on the “Status Light Code,” it means “Temperature Exceeded.” It made sense as we had a heat wave recently. Since its a Vermont Castings it is probably worth the money to fix? Different thermocouples get replaced differently. It may be that it’s dirty and needs cleaning. Another possible reason why a pilot won’t stay lit has to do with the flex tubing. The system kept coming back with 4 flashes. Cleared gas chamber of debris, Replaced thermopile/pilot assembly seemed to get more gas to pilot. Once the pilot stays lit, turn the pilot valve to the on position. If your furnace’s pilot light won’t stay on, the furnace won’t work. If your furnace’s pilot light won’t stay on, the furnace won’t work. Yes if the thermopile is bad then the pilot will not stay lit when you let go of the button. If your gas water heater doesn’t stay lit, you may have a defective control thermostat. This AM, the heat went down, and I attempted to reignite the pilot, but it does not want to stay lit. Thankfully, a dirty pilot tube is the easiest issue to fix. Do you hink I should go get a new VR8200A gas valve? 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. https://customer.honeywell.com/resources/techlit/TechLitDocuments/69-0000s/69-1219.pdf. I've got an urgent situation. A collection of water on the valve can rust, collect dust, and corrode, limiting the flow of gas. Most of the time you can just pull down on them to pull them out of a spring clip that holds them in place. It did not need to be reset (zero resistance across the terminals). The pilot light is lit by an electronic spark. Be sure to inspect the thermocouple carefully. For a better experience, please enable JavaScript in your browser before proceeding. Bradford White 50 gal unit (Mod. The WT8840 series is the Water Heater Control for trade use to replace WV8840 valves used in AOSmith and Bradford White Water Heaters. 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. # MI5036FBN) wasn't giving hot water, pilot light wouldn't stay lit and water was leaking from bottom of gas valve (this part). Read on for reasons why, and what you can do to fix it. 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