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HVAC question on Goodman/Amana furnace

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January 17, 2018, 08:46 PM
Gene Hillman
HVAC question on Goodman/Amana furnace
I have a 15 year old Amana furnace GUCA070BX30 with a PCBBF118S circuit board. The humidifier has stopped working. The 24 volt transformer is not getting any 110 from the circuit board with the furnace and fan running. Does this mean that the circuit board is bad or could there be some other problem?
January 17, 2018, 09:12 PM
Excam_Man
Normally, the humidifier terminals are energized with the burners.

You could try the terminals for the electronic air cleaner. They will be energized during a blower call.




January 17, 2018, 09:17 PM
Gene Hillman
Wouldn't that activate the humidifier during air conditioning also?
January 18, 2018, 01:56 PM
Excam_Man
Yes, but for testing purposes, it would verify operation.

If there's no power on the humidifier terminals, you could wire the low voltage side to the thermostat connections (C and W).