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  1. #1
    Join Date
    Nov 2012
    nashville TN

    steam humidifier

    I have just put a steam humidifier in a house and am having a new problem that I have not seen before. When the humidifier calls for the fan to come on, the condenser contactor pulls in and the condenser runs. It is a rheem 2 ton split heat pump and the air handler has a x13 blower motor. I ran my 2 wire fan switch from my humidifier to the air handler and I have one wire hooked up to my 24v hot and 1 wire to my G terminal. I am wondering if my voltage in backfeeding through my thermostat and sending voltage to my contactor. I have put in several skuttle steam humidifiers without having this problem any help would be great. Also I am new to this site and if I have broken any of the rules please let me know.

  2. #2
    Join Date
    May 2000
    Indianapolis, IN, USA
    Hopefully the original poster found this message here where it belongs.

    You can't just energized G without isolating the thermostat. Check your installation wiring diagram to see how to do that.

    Sent from my HTC VLE_U using Tapatalk 2

  3. #3
    Join Date
    Sep 2012
    Ottawa, Canada
    Wait till you have to clean them and it will be often. I see a lot of rusted ductwork too.

  4. #4
    Join Date
    Jul 2009
    Columbia, MD
    yes. you are backfeeding thru the thermostat.

    wait for after a year and the homeowner is pissed because it breaks and you charge them to fix it.

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