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

    Nov 3, 2008, 10:54 AM
    Blower relay
    The blower on my rheems criterion II gas heater does not shut
    Off how can I find and replace the problem
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
    Uber Member
    		  
    #2

    Nov 3, 2008, 11:32 AM

    Older furnaces use a fan center and a limit control. Newer furnaces may have the blower relay on the control board and use a timed shutdown.

    If you cannot turn the fan off with the fan on/off control and the tstat is not calling for heat, then it's a pretty safe bet it's the fan relay.

    Follow the "bread crumbs". Follow the "money".his In this case it's "follow the blower motor power wires".

    Possible defective parts:

    Fan relay/furnace board.
    Limit control
    Thermostat
    Thermostat wiring
    dac122's Avatar
    dac122 Posts: 463, Reputation: 17
    Full Member
    		  
    #3

    Nov 3, 2008, 02:42 PM

    If you reset power to the system what happens? Does the fan come back on immediately, or only when there is a call for heat/cool or you turn the fan on manually?
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