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Gmp075-3 Indicator still flashing 1 after circuit board replaced

Posted by cmason236 on Jan 31, 2009 My GMPO75-3 is locking out with a flash indicator of 1. I have had the circuit board replaced, the sensor cleaned, and a new filter put in. It worked for a week perfectly fine. Since then about every 24 to 48 hours it locks out again flashing a 1. The little gold ignitor comes on but the blue flames don't start. If I reset the circuit board the heat starts right away.

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  • cmason236 Feb 21, 2009

    Thats for your advise. A strange thing has happened. The new board failed three times flashing 1 and has not failed since. It has now been a month.



    Do you think it needed to time to reset or adjust?

  • Pyldrvr May 11, 2010

    Sounds as though you may have a bad connection on the board or bad solder conection on the board. I board is not older than a year it should still be under warranty..hope this helps

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Replace the gas valve. If you getting 24vac at the gas valve and it fails to open. Firist check all wiring connectors.

Posted on Mar 28, 2009

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