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

    Feb 20, 2008, 07:51 PM
    Traying to replace a G775 with S8610U IGNITION control
    Having hard time wiring the replacment control Gas valve won't open flashing light indicat low secondary voltage . Every thing is done as per instruction
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Feb 21, 2008, 02:38 AM
    Look at these.

    http://customer.honeywell.com/techli...it/69-1955.pdf

    Make sure SW1 and SW2 are in the off position.

    See here

    http://customer.honeywell.com/techli...it/69-1955.pdf


    Check transformer and AC line for proper input
    Voltage to the control. Check with full system load
    On the transformer.

    Also check all your grounds in the main panel to the furnace.
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