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    jb614's Avatar
    jb614 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Feb 12, 2009, 09:25 AM
    Blown 3amp fuse
    Three year old rheem gas furnace kept blowing 3amp fuses when calling for heat, fan and a/c work fine.I attempted to troubleshoot by disconnecting components and running it.It seemed that I isolated problem to control board.After reading many posts online about similar problems I decided to install new control board.$160.00 later I'm still blowing fuses.Any ideas would be appreciated.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Feb 12, 2009, 10:07 PM
    Check for worn or shorted wiring. Check all heating components i.e. limits,valves,etc for internal shorts to ground. Had one with a disc limit that you have to take the limit off the furnace before you could see the short circuit. It is a time burner to check it all.
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