Model #GUPI120-5 GOODMAN Furnace- Wall

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Question and Answers


Humidifier to Furnace Wiring Problems

A: is a great place to have an expert respond to a very confusing problem. If you decide to have a technician assist you can assist you. I attached the link below.

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James -
December 15, 2010

Thank you for sending the image. Without seeing the furnace and relay, I can not tell you how to connect the wires to the humidifier.

The humidifier should receive voltage each time the fan on the furnace is powered up.

Since the humidifier has been working for some time, I would connect the new humidifier to the terminals the old humidifier was connected to.

If you are not comfortable replacing the humidifier, you can go to and get a Sears technician to replace it.

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Jimmy K -
Sears Technician
December 17, 2010
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