Hob Gas Burners & Thermocouples . That's important because gas is always being supplied to the pilot to keep the flame lit. The ignitor never gets a break and will burn out quickly. The run capacitor keeps burning up in about 4 minutes. I was first given this question by a very good customer. If you do notice it’s overflowing, use a pipe wrench to open the cap and drain out any liquid. Patio Heater Won't Stay Lit One common issue that patio heater owners face is keeping their patio heater lit. Usually its because the pilot flame is to high and covers the top of the thermocouple , the top of the thermocouple needs to be clear of flame this is where it dissipates heat, let me know if that is the case. If it is working properly, the valve will stay open after the pilot has been on for half a minute or so. 1 decade ago. Relevance. Bruce, … Ask Your Own HVAC Question. Comment; Flag; More. A gas fireplace that is off would not cause other heating systems to stop. The typical cause for this is that the pilot light flame has become too far away from the thermocouple. And that can be a possible reason for your problem if the carbon build up takes place on the thermocouple of the propane light. Maybe heat causes enough expansion/ movement for something to only work intermittently. If the thermocouple is a sealed environment, as is used in ultra-high temperature monitoring devices, any exposure to the atmosphere can exacerbate natural decay processes, leading to premature thermocouple failure. High home line voltage. The ignitor gives a spark between the cap and the plug to light it and the thermocouple is a safety device to keep the gas on while there’s a flame. A burned out or broken thermocouple should be replaced. The thermocouple on your gas fireplace is a heat-sensitive device that keeps the pilot gas tube open while the pilot is lit. Why does my alternator fuse keeps burning out.? I have replaced 3 this winter alone. 3. When a thermocouple fails, the pilot light won't stay lighted. Check all of your connections for cleanliness and security. Favourite answer. The guy had purchased a lot of custom products from us and I really felt bad about his fire pit having problems. On 2017-01-16 by (mod) thermocouple that keeps fireplace burning has snapped. If the thermocouple feels the heat from a pilot light, it keeps the gas line open. If the pilot light goes out, the thermocouple senses a loss of heat and the rod covers the gas valve cutting off the fuel supply. This component usually is located not far from the pilot light burner. Anonymous . At closing time I turn off the gas lever to the burners, and next morning I go thru the same process again. If the furnace pilot light keeps going out, the thermocouple may be deformed or bent. Rather than trying to unfasten the thermocouple inside the water heater's burning chamber, it's easier to remove the whole burner and thermocouple assembly. Dirt around the pilot light, particularly around the pilot light opening, can cause it to keep going out. You have a thermocouple fitted by the oven burner and this most probably needs replacing. Note that on some mornings the burners will ignite normally(no flame torch), and stay on, without a problem. The thermocouple, which operates as a safety device, turns the gas supply off when the pilot light goes out. A layer of dirt and grime can hinder the electric current from reaching the thermocouple. Faulty Thermocouple: The thermocouple, as explained above, exists to sense if the pilot light is lit. Your furnace’s thermocouple is a copper rod that sits next to your furnace burners.It’s often called the “flame sensor” because its job is to detect whether the pilot light is lit or not.If it can’t sense a flame from the pilot light, it prevents the gas valve from opening and … 7 Answers. The thermocouple acts as a safety measure. Thermocouples eventually wear out and need to be replaced. When it is not lit, the device shuts the gas supply off, preventing any danger and maintaining safety. ( 4 years ) But now it seems that the thermal couple in my furnace keeps going bad way more then once a year. It was the part of the pilot flame normally pointing backwards to the thermocouple tip (and normally hitting it directly) that caused the fireplace to automatically "de-couple" since the thermocouple never got hot – a cold thermocouple means that the fireplace thinks the fire is blown out and it stops the gas inlet for for safety reasons. The thermocouple is the small copper rod that the pilot light hits. Thanks . I spoke to the factory and they said it was because I was running it from a old 100' extension cord. Level 3: An expert who has achieved level 3 by getting 1000 points. Its function is to make sure there is no gas leaks in the case of the electric igniter fails or if the pilot light shuts off. Reply: checklist for thermocouple problems. A faulty thermocouple would shut off the gas supply to even a burning pilot light, which would result in cold water for you. When a fan blade becomes unbalanced, the fan starts to shake, and the vibration jiggles the bulb filament and shortens its life. It's a heat sensor placed next to the pilot flame that signals the gas valve to stay open when the flame is burning. I light the oven but it goes out not sure why have double oven and small oven is okay. Usually, a problem with the thermocouple causes the pilot light to go out. However, the thermocouples in many older heaters start malfunctioning. (A device called a thermocouple is designed to recognize when the pilot light fails and then shut off the burner as a safety precaution.) Dean If the thermocouple has broken off you will want to dash out to a plumbing or building supplier and buy a replacement one to get your heater going. Answer Save. 1 cause of pilot lights that won't stay lit is a worn-out thermocouple. Source(s): Plumber/ gas … You can try a rough-service bulb to correct this problem. The No. No hot water on a cold Monday morning. Therefore, a dirty thermocouple might be the reason why your water pilot keeps going out. Check your voltage to see that you are in the 110 to 125-volt range. We’ll look at each one here. jim sharp. It consists of a heat sensor connected to a solenoid; when the sensor is not heated by the pilot flame, the solenoid closes the gas supply line. Want Answer 1. The solution: Again, you’ll have to do some cleaning. So I got a new capacitor just like the original one and plugged it into the wall straight from the motor. What are Thermocouple and Pilot Light? The number one reason why the pilot light keeps going out is the thermocouple.Either the thermocouple is going bad or it is dirty and needs to be cleaned. 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