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Humdifier on furnace

Water supply in humidifier always spraying onto filter when unit is turned on

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Re: humdifier on furnace

Check your humidistat for proper operation, when full off,, you should get infinite ohms using an ohm meter. Make sure wires are not shorted on the humidistat. Quick test is to diconnect one humidistat wire and unit should never turn on. If it turns on, then it is not wired in series. If the water stops flowing when the voltage is not on, but water flows when energized then your solinoid IS GOOD and you must check your humidistat and furnace electrical connections.

Posted on Dec 26, 2009

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Re: humdifier on furnace

I have the exact same problem. At this time I am looking for a new solinoid (part on the bottom) to install. Anyone else having this problem and know where to find replacement parts

Posted on Jan 26, 2008

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Our aprilaire humidifier is only 4 years old and it does not seem to be working. We have static in the house and when I did test mode it never drained water like it was supposed to. Any ideas what I can do...

Hope this helps, check and see if humidistat is set to 35% humidity and that bypass damper on humidifier is in the open position or winter position.(humidistat is usually located on cold air return duct near furnace). Next, replace humidifier media pad, remember to replace media pad (filter) annually, you also may want to clean any lime deposit out of humidifier housing with a solution of warm water and white vinegar before installing your new media filter.Remember to turn power off at side of furnace when cleaning humidifier and replacing media. Before installing new media turn power back on to furnace, set humidistat to the on position, turn furnace thermostat above room temp., and inspect humidifier to see if water is running from top,(you may want to have a bucket under humidifier when checking for water), if you see water running, turn power back off to furnace, properly install new media filter, reconnect humidifier cover & set humidistat to 35%. If you do not see water present, check water supply valve to humidifier and make sure its turned on. If water supply valve is open, then check water supply tubing for blockage.And the last things to check is to make sure all registers through out your home are open and not blocked by any objects, also make sure furnace filter is cleaned, if none of this works refer to installation manual to see if humidifier was sized and installed properly, Good luck.

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1 Answer

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1 Answer

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Is the furnace fan set on auto or on. You will get better humidity if you keep the fan on. It won't add much to your electric bill because many of the newer furnaces operate the fan on DC voltage. Try it!

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Hi John Your whole question did not show up (maybe you can re-post) . I can answer what part i understand though. If the humidifier was wired in right it will not send power to the humidifier until the furnace is on, and calling for heat. This stops the unit from working in the cooling mode in summer.Make sure your furnace filter is clean as well

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1 Answer

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Sounds like the air flow is too great and it is blowing the water in the bottom of the tray around before it gets a chance to drain. Try placing your summer, winter damper at half closed to slow the airflow down a little.

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