intertherm help - http://www.hvacmechanic.com/ Forums
Original message
| wilderhouse
 |  "intertherm help"
, posted Thu 17 Nov 18:41  
am having trouble with my M1 series furnace....
it will cycle fine thru 1st cycle but will not refire when thermostat calls for new heat .
the inducer moter does not shut off it runs constant even without flame.
code shows inducer switch stuck, which should show since inducer is still pulling air.
IF we kill all power then re-establish power it will run the 1st cycle again as before...
any help??
J W
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Replies:
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| fitter597
| "Re(1):intertherm help" , posted Thu 17 Nov 18:59
the relay that turns the inducer on might be sticking, you said after the call for heat ends the inducer still runs, if that is the case the unit will see the pressure switch closed and it won't fire, i don't know the intertherm setup but follow the wires from the inducer and see if the go to a seperate relay, or if the go to a printed circuit board, if the go to a board then you may need to replace the whole board.
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