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MOFFAT G32MS will not fire up, gas valve will clink but no firer, spark electrode or mother board?

Question asked by koolhof on Oct 13, 2018
Latest reply on Oct 15, 2018 by ectofix

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Non-profit and need to fix machine but need to order the right part

Spark Electrode or another part?

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ectofix Oct 15, 2018 5:04 PM
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While I've always felt more compassionate towards non-profit types of businesses, that doesn't make diagnosis and repair of equipment any easier...whether I'm there to do the repair, or from the minimal information you've provided HERE on the internet.

Several questions:
- Are you sure it's the gas valve that's clicking?
  (You didn't mention whether the door switch is actuating the blower motor. That would prove the door switch works...which is critical)
- Is the gas to the oven TURNED ON FULLY behind the oven?
  (Handle in line with the piping means it's OFF. Turn it until 90° to the piping) WRONG. SEE CORRECTION IN MY OTHER POST
- If a flexible hose with a quick-disconnect supplies the oven, is the quick-disconnect (QD) FULLY SEATED?
  (If the QD pulls loose without pulling back on the QD's collar, then it WASN'T PROPERLY SEATED)
- Are you sure there's proper gas pressure being supplied to the oven?
  (Possibly a bad line regulator)
- Is the ignitor SPARKING?
With little info to go on so far, there are numerous other possible causes:
- Failed thermostat
- Bad transformer
- Bad gas valve
- Bad igniter assembly
- Faulty wiring someplace
- Bad ignition box (the closest thing in that oven that'd fit your stated "mother board")
- Clogged burner orifice
- Other possibilities that I can't think of at the moment
That's about the extent my help presently. Here's a manual:
MOFFAT G32MS CONVECTION OVEN Service Manual
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- koolhof @ ectofix on Oct 15, 2018 9:49 AM
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  Thanks for the quick response I will be checking all these things
  thanks
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  - ectofix @ koolhof on Oct 15, 2018 5:06 PM
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    CORRECTION!
    
    I made a mistake. The second time this year, so I must be losing my edge.
    
    In my earlier response, I proposed a question and what to look for. Here's my correction:
    
    Is the gas to the oven TURNED ON FULLY behind the oven?
    (Handle in line with the piping means it's ON. If it's turned 90° to the piping, THAT means it's OFF.)
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MOFFAT G32MS will not fire up, gas valve will clink but no firer, spark electrode or mother board?

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