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

    Feb 6, 2008, 11:47 PM
    How do I wire up a 24v transformer in a furnace for thermostat? What does 24v & 24vA connect to? I have a problem of fusses blowing when I turn on the furnace.:confused:

    How does heating transformer work?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Feb 7, 2008, 01:06 AM
    Basically one side of the 24 volts goes to the limit switches and on to the gas valve. The other side of the 24 volts goes to the thermostat and back out of the thermostat to the gas valve.

    This is a very simplistic example and not to actually used on your furnace. Just a example.

    Sounds like you are lost and have the wiring shorted out blowing fuses.

    I recommend you call a HVAC person to correct your problems. You obviously have no idea whet you are doing and you can damage the furnace or cause a explosion hurting your family and yourself.
    raymond.nickson's Avatar
    raymond.nickson Posts: 2, Reputation: 1
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    #3

    Nov 26, 2010, 05:29 AM
    The one that installed the unit has been contactes and we have replaced all the parts in side the hweating unit and it still blows the fuses/tramsformer
    .
    raymond.nickson's Avatar
    raymond.nickson Posts: 2, Reputation: 1
    New Member
    		  
    #4

    Nov 26, 2010, 05:32 AM
    Comment on hvac1000's post
    The one that installed the unit has been contactes and we have replaced all the parts in side the heating unit and it still blows the fuses/tramsformer
    He is lost also
    electricgig's Avatar
    electricgig Posts: 4, Reputation: 1
    New Member
    		  
    #5

    Mar 4, 2012, 07:26 AM
    Insirt a fuse in front of the transformer at both sides(just to see if the fault is after the transformer or on the primary side)if that isn't the fault your transformer may be to small!
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