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Hobart C-44 gas dish machine backfire

We are looking at a c-44 gas machine that had the board changed but it fires for several seconds then the delay and starts again for several seconds-then the delay and starts again running for several seconds and then it drops out.
sometimes it will spark then a bang a slight delay and sparks and then a bang again--is it possible one of the gas valves are getting stuck .
The flue is clear-no warter in the pan below-good vent above unit--the blower motor is working-even tried blocking off some flow.
the cover is sealed and on tight-could it be the new board is bad.
could the valves modulate mechanically from a spring problem and the 24 volt coil is ok-it was checked and it is ok.

thanks

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  • jd182 Jun 07, 2008

    not sure-however one of the techs replaced the ignition cable and probe and it is working for now
    however before replacing the part the probe and spark seemed to respond to a propane torching normally

    when the probe was in it was going on 7 seconds then delay-another 7 sec then delay

    sometimes it would delay then explosion--delay then explosion
    hopefully it went away with the new spark assembly
    have you had this problem and what could be other causes
    thanks

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How old is this unit?

Posted on Jun 06, 2008

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