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Will light and remain lit 5min. 30min i dont think its thermocouple thinking something with the safety tilt

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First, for those of you who might not know, "What is a flame sensor?" A flame sensor is a safety device. When your furnace's main burners ignite (light Up) the flame sensor picks up the heat from the furnace's main burning and says, "YES," and sends a signal back to the main furnace control board saying that it is OK to let the main burner stay on. Or if the main burners do not ignite, the flame sensor does not pick up the heat and says, "NO" to the main control board, Shut That Gas Valve and Main Burners Down! Thank God we have safety controls like the flame sensor. Most of the time, after turning your furnace's power off, you may clean the flame sensors with light sand cloth, emery cloth or steel wool. Reinstall the flame sensor and you are back in business! Over the years flame sensors can build up a light coating of burned-in dust and dirt. This insulates the flame sensor so that it doesn't sense the heat of the flame well enough, by cleaning it you have almost restored it to its new condition.
Seldom, but sometimes they do go out completely.

Posted on Nov 08, 2010

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I have a readyheater model 65-85 the flame will not stay lit im thinking thermal couple is there a way to test this part? or could it be another problem?


If your pilot light will not stay lit when you release pilot light button then chances are that your thermocouple is bad. Make sure that the tip of thermocouple is directly in line with pilot light. Tip of thermocouple should be cherry red if it is properly placed. If pilot will not stay lit then replace it. If you aren't sure about placement of thermocouple you can heat thermocouple with a seperate heat source. If you do this and pilot light stays lit then reposition thermocouple in pilot flame. If it still won't keep pilot burning then replace thermocouple. Hope this helps. Thanks.

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Pilots lites , holds ok for minutes,but once move


Hello KJGreen, It sounds, based on your description, as though the thermocouple is faulty and should be replaced. If the pilot light stays lit and you've left it on for several minutes before turning the knob on to light the log set, then that indicates that the thermocouple is bad.

The thermocouple is a safety device (heat sensor) designed to stop the flow of gas to the burner in the event the gas flame goes out and the pilot goes out. The sensor will only allow the gas valve to open once it has reached the preset temperature.

To confirm that the thermocouple is defective, I would light the pilot light and allow it to remain lit for up to 10 minutes before I attempted to turn on the log burner. If, after 10 minutes, the log burner still won't stay lit, then you know that the thermocouple needs to be replaced. Otherwise, the burner should light, since after 10 minutes, the sensor should be hot enough to signal the gas valve to open.

If you are going to have this replaced, please make sure you use only an approved supplier, since an incorrect replacement part could cause an unwelcome malfunction of the gas log burner. Safety should be primary when dealing with open flame burners.

Hope you find this Very Helpful and best regards!

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