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  1. #1
    Join Date
    Jan 2009
    Posts
    2

    Confused Need Low Voltage Help

    I hope someone can help I must be over looking something. Heil gas furnace single stage heat and cool. I did not have 24 volts at the transformer (i did have 120 on primary) so I replaced the transformer. I now have 24 volts yet no voltage on the t-state terminals of the board so I replaced the board. hooked up all the wires double check powered up and blow the 5 amp fuse. (thank god for the fuse). I then removed all low voltage wires replaced fuse powered up and everything is ok. Installed low voltage wires fuse blows. I removed the thermostat replace fuse powered up everything OK. Put R & W together heat works fine. So I thought must be t-stat replaced stat confirmed wires on computer board and stat powered up and blow the fuse. I then removed Y & G from stat replaced fuse powered up and heat works perfect.
    Any idea why when Y & G are hooked on the stat up I am blowing fuses ? I even un hook low voltage to condensor. Really need help thanks anyone.

  2. #2
    Join Date
    Aug 2002
    Location
    Southold.calm
    Posts
    6,354

  3. #3
    Join Date
    Feb 2003
    Location
    pittsburgh,pa
    Posts
    727
    site rules no diy

  4. #4
    Join Date
    Nov 2008
    Location
    Meriden, Kansas
    Posts
    435
    You obviously know some things about electricity but it is time to call a service company. You are just switching parts without really understanding how it works. You have probably spent more on parts then the whole repair by a pro will cost you.
    Anything I say here is only my opinion. Even if you understood what I said.... What I said may not even be what I meant.

  5. #5
    Join Date
    Jun 2001
    Location
    Louisville, KY
    Posts
    12,189
    Thanks for reporting this thread.

    Waaaaaaay beyond the rules in the deleted posts.

    Thread closed.
    Perhaps you should have read the instructions before calling.

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