1

I have an Aprilaire 700 whole house humidifier with a manual mode humidistat on the return. I noticed that the unit was draining water even when the heater/fan was off. Is this expected? I just hear it constantly draining, which I'm guessing is due to low humidity in the return? What's the point of draining when the fan is off?

Additional details: If I lower the threshold on the humidistat, I hear the solenoid engage (or disengage?) and the unit stops draining. There are no noticeable leaks. The only water I see is what comes out of the drain pipe.

  • what do you mean by draining? – jsotola Dec 5 '19 at 3:31
1

Sometimes the moisture drains when the fans and or compressor is no longer running, we would to know more about your system, it could be a bad valve in the supply to the humidifier causing the water but more information is really needed to provide a positive answer.

| improve this answer | |
  • What additional information do you need? – Prasad Silva Dec 8 '19 at 17:26
  • Is it draining at the air handler? AC? Is there a flow or vane switch , if your ac coils are icing it may take several hours for the ice to melt, the humidifier should be controlled by a pressure switch or a vane switch that turns off the flow when the fan is not running, it sounds like a bad pressure/vane switch because it quits after turning it down, however I have seen icing blamed in the past when the humidifier was working correctly. – Ed Beal Dec 8 '19 at 17:44

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.