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    lar3218's Avatar
    lar3218 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Jan 11, 2007, 04:21 PM
    Furnace 3 amp fuse blows after install of honeywell HE360 humidifier
    My wife's uncle installed a new honeywell HE360 humidifier and now the 3 amp fuse keeps blowing?
    I had a humidifier before and just installed a new onewhat could be the problem?
    Please help
    Thank you
    Larry
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #2

    Jan 11, 2007, 06:11 PM
    Double check the electric rating for the new humidifier, it might be more than 3 amps.
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #3

    Jan 11, 2007, 06:12 PM
    Another tought, how good is your wife's uncle at installing things? Double check his connections. It is pretty straight forward and difficult to do wrong, but it's posible.
    letmetellu's Avatar
    letmetellu Posts: 3,151, Reputation: 317
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    #4

    Jan 11, 2007, 10:11 PM
    For the 3 amp fuse to blow means that the amp usage is to high or that there is a shorted wire in the low voltage wiring. Make sure a wire has not been cut where it might be pulled tight against some sharp metal. Do you have a meter that will check amperage as low as 1 amp? The actual amperage draw should not be much more than 1 amp if that much.
    lar3218's Avatar
    lar3218 Posts: 2, Reputation: 1
    New Member
    		  
    #5

    Jan 12, 2007, 01:34 PM
    Hi
    Thanks EVERYONE

    My wife's incle is a a/c heating licensed, for more than 30 years, but guess what... he found the problem, well with the old carrier humidifier, that was installed w carrier furnace, the 24 volt feed went off the circuit bd that has the 3 amp fuse. Well this new Honeywell HE360 has a transformer in the fan unit, so it gets the 24 volts at the humidifier. So when we had it hooked up, it was getting the 24 volts from the circuit board and the humidifier unit!!


    He also took the furnace out of line and now it works fine, but we now must buy a current sensing relay to have the Honeywell Humidifier work

    And he proved it to me by taking amp readings. and it blew the Honeywell, I took it back to Home depot, got a new one
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