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

    Dec 7, 2006, 04:50 PM
    Faulty Furnace
    Dear Sir/Madam:
    Hello, I stared a furnace that has not run in over a year. Initially it fired up fine and ran for awhile. I shut it down and did not fire anymore. The blowers were working but the igniter did not glow. I tested for low and high voltage and realized the transformer had shorted out. I replaced the transformer and the igniter was glowing, ignited the pilot light but no gas (natural gas) was delivered by the gas valve . My question is, can the gas valve open for the pilot and not for the burners. The gas valve is a Honeywell SV9501.

    Like I indicated before everything works except the gas flow to the burners.

    Tom Medina
    Morrowrj's Avatar
    Morrowrj Posts: 345, Reputation: 22
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    #2

    Dec 7, 2006, 04:59 PM
    Yes, you can definitely have a pilot but no burner condition.
    NorthernHeat's Avatar
    NorthernHeat Posts: 1,455, Reputation: 132
    Ultra Member
    		  
    #3

    Dec 7, 2006, 05:15 PM
    Yes there are 2 solenoids in a your specific gas valve it sounds like, a pilot solenoid and a main solenoid. You should have 3 wires to the valve MV (main valve) PV (pilot valve) and PV/MV common. If after the pilot lights you get 24 volts between PV/MV and MV the valve is bad. If you never get the voltage to the valve during start up you have another problem, check safety devices in series with the MV.
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