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Old 12-13-2007, 09:25 AM   #1
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GMP100-3 Problem


I am having a problem with my heater and was wondering if anyone can help me to fix it. I have GMP100-3 and my problem is that during the cycle, burner comes on for few seconds and then goes out. This repeats forever. The status light blinks once which means problems with gas valve, gas pressure or flame sensor. I checked all my sensors and they look good. I bypasses all sensors but I am still having this issue so I don't think they are the problem. I am not sure if there are any problems with gas valve or pressure sinceI don't know how to check them. The gas comes on so don't think this is it. Just to be sure, I purchased new circuit board but the problem still exists. Does anyone have any idea what the problem might be? It's very cold today...
Thanks in advance.

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Old 12-13-2007, 02:04 PM   #2
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GMP100-3 Problem


nevermind. it was the flame sensor. I cleaned it and now it works perfectly!!

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Old 12-13-2007, 04:55 PM   #3
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GMP100-3 Problem


I was going to say check the flame sensor but you have done that.
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