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The pilot light won't stay lit when you turn it from pilot to a temperature setting

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Some times there is a glitch in knob.try holding flame at piolit while turning knob.be careful.do not bring flame later.you might be able to raise flame size .what happens when main valve comes on there is a slight drop in pressure look on gas valve for adjusting screw, might be under a cap . if none of this helps the orifice might be too small you have to take piolit assembly apart to get to it.

Posted on Jan 01, 2011

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Posted on Jan 02, 2017

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ozark333
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SOURCE: pilot light will stay lit Lennox G8D2-82

You may need to replace the Thermocoupler. It screws into the gas regulator and the sensor end is set in the flame of the pilot light. You can get one at any appliance parts store. The Thermocoupler simply feels the heat of the pilot light and sends a very small amount of voltage to the gas switch that opens when your thermostat calls for heat. If the pilot light isnt lit, no voltage from the sensor and no gas can be released by the regulator.
Anyone can replace one. Just find the tip that sits in the the pilot flame when you try to ignite the pilot light. Follow it down to the regulator and unscrew it. There is no gas involved. It is Ultra Low Voltage. No danger.
Be sure to turn off the power to the unit before you begin removal. Take it to the parts store along with your furnace brand and model number. If you see any identifiers on the regulator, note them and take them with. When you replace it be sure to have the sensor end up in the flame of the pilot.

Posted on Sep 29, 2009

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SOURCE: warm morning propane heater. new thermal couple.

There are basically three things that can go wrong with the Warm Morning .
Sensor shut off. There is a sensor button on the back of the unit with a wire going from it to the thermocouple. This sensor turns the heater off if the flue is blocked, however it will also shut the heater off if the wire contacts are dirty, or if the sensor has gone bad.
You can test this by bypassing the sensor. Disconnect the two wires from the sensor and reconnect them directly together. If the pilot stays on, your problem is here. Try cleaning the wire contacts first.
Pilot orifice. If the pilot flame is small and doesnt look healthy, the pilot orifice may need cleaning. The hole is very small and can get dirty. Disconnect the silver tube and clean with electrical parts cleaner. Never try to clean the hole with an object like a pin, you may damage it. You may have to slide out the burner unit to get at the silver tube. (Always shut off gas before disconnecting lines and after you reassemble, spray joints with soapywater and look for small bubbles which may indicate a gas leak. Dont use parts cleaner around an open flame.)

Thermocouple can go bad but this is not as common as the first two problems.

Posted on Jan 28, 2010

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My pilot stays on on my propane furnace but will not light up


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