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

    Mar 9, 2009, 05:34 PM
    Thermostat reads -ac
    Have carrier furnace, the thermostat reads -ac blower motor runs, have on all the time, pre blower works also, if set at 75 it clicks on like it wants to work then -ac pops up on thermostat, tried new batt in thermostat. Any help would be appreciated.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Mar 9, 2009, 10:43 PM
    Exact brand and model number of thermostat and sub base if installed.
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
    Ultra Member
    		  
    #3

    Mar 10, 2009, 03:40 AM
    Sounds like a Honeywell Chronotherm is losing low voltage power ("AC" on the display is telling you so). The continuous blower operation is the result of an open limit device or low voltage fuse. Look for a status LED on the unit. If flashing, it will provide a clue.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #4

    Mar 10, 2009, 09:44 AM
    I see you have your crystal ball working again. LOL
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #5

    Mar 10, 2009, 04:28 PM
    Abra-cadabra,, there now its fixed
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
    Ultra Member
    		  
    #6

    Mar 10, 2009, 06:38 PM
    The crystal ball is hosed. I've turned to the bowling ball.;)
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