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    jd109's Avatar
    jd109 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Dec 9, 2008, 01:13 PM
    Intertherm furnace does not fireup
    I have a intertthrm gas derect ignition furnace model MMHB-070ABHR-06 led light flashes 2 times furnace does nothing codes on door panel are unreadable need the diagnostics codes can any one help I would be very grateful thanks in advance
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Dec 9, 2008, 02:07 PM
    Voltages on control mod are

    Control Module: On call for heat:

    L1 and L2 = 120vac

    IND and L2 = 120vac

    After approx. 1 minute :

    HSI and HSIG = 120vac

    PSI and C = 24vac

    PSO and C = 24vac

    GV and C = 24vac

    This is all the info I have
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