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the gas to pilot light shuts off after running a few cycles or about 8 hours

the gas to pilot light shuts off after running a few cycles or about 8 hours

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  #1  
Old 01-27-13, 05:44 PM
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the gas to pilot light shuts off after running a few cycles or about 8 hours

I have replaced the thermocoupler and evn adjusted the coupler but still runs only for a while instead of like it is suppose to any suggestions
 
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Old 01-27-13, 05:48 PM
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It would be nice to know what kind of device we are talking about.
Is it natural gas or propane ?

Usually a make and model number can be a big help.
 
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Old 01-27-13, 05:54 PM
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It runs on natural gas and is a moncrief not sure of the model number.
 
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Old 01-28-13, 12:32 PM
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You have a standing pilot light that stays lit all the time, is that right?


If so, the most common reason that the pilot drops out is a dirty pilot burner and pilot orifice.

The pilot flame should look like a small blowtorch, with the flame engulfing the tip of the thermocouple. If the flame is yellow tipped or a "soft" flame that can be blown around like a candle flame, the pilot likely is the problem.

The pilot burner and pilot orifice should be cleaned in any case since it's a like cause of a problem, is ordinary maintenance that should be done once/year, and costs nothing to do other than some time.
 
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Old 01-29-13, 04:31 PM
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Yes, don't replace the thermocouple unless the pilot doesn't stay lit right after releasing the knob/button. The orifice is most likely plugged.

Thermocouples are extremely reliable.
 
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