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

    Jan 5, 2009, 06:39 PM
    Filter Replacement
    All I did was take the filter cover off the furnace and changed the filetr to a new one. Now the heater won't come on once I turned back on the system from the thermostat. The furnace is made by Carrier. Did I do something wrong?

    FFelix
    21boat's Avatar
    21boat Posts: 2,441, Reputation: 212
    Ultra Member
    		  
    #2

    Jan 5, 2009, 07:09 PM

    Look for a possible safety switch that needs depressed where the filter goes/lid. The furnace may be set up not to run without a filter in it and the new filter may not be sensed there. Is your thermostats digital and it needs "reset" pushed because of the "Filter code blinking?

    Signed 21 Boat

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    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #3

    Jan 5, 2009, 11:49 PM
    There is a furnace interlock switch that the blower door depresses when the door is installed properly. The switch could have gone bad OR the door is not installed properly.
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