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    ronnie hinds's Avatar
    ronnie hinds Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Sep 27, 2008, 08:13 AM
    AC notworking
    The central AC is not working. There is no air coming out of the ducts nor does the compressor come on. I have already replaced the transformer/relay combination. Without the thermostat being turned to Cool, I can hear the transformer/relay humming when I switch on the 110V. I figure the compressor would come on even if the blower did not or vice versa. I also replaced the thermostat, one was handy. I would appreciate some pointers. If the blower motor is bad, would that prevent the compressor from coming on because of a biult-in safety feature ? I do not have a schematic diagram to see the flow.
    Thanks.
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
    Uber Member
    		  
    #2

    Sep 27, 2008, 08:18 AM

    I haven't see any 110/120 Volt Central Air units. Check both Breakers and both Disconnects for power(In and Out)
    When thermostat is set to cool, their should be 24 volts to Compressor contactor Coil.
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AC notworking [ 1 Answers ]

The central AC is not working. There is no air coming out of the ducts nor does the compressor come on. I have already replaced the transformer/relay combination. Without the thermostat being turned to Cool, I can hear the transformer/relay humming when I switch on the 110V. I figure the compressor...

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