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Aprilaire 760 humidifier. no power to humidastat

Not showing any power to humidastat wires

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The 760 send power out the humidistat is just a switch if you touch the two brown wire coming outof the 760 the humidifier should come on if it doesnt and you had appiled power to those wire you probably shorted the 760 control board

Posted on Sep 13, 2009

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Aprilaire 760 keeps running


Is this a newly installed unit it sounds as if there's a wiring issue. Could you show a picture of the wiring terminals. If this is not a new install try turning of your furnace fan.

Nov 02, 2014 | Aprilaire 700 Humidifier

1 Answer

Squeeky noise coming from aprilaire 760 when running. Was told bearings were bad but see no parts available for bearings. Any suggestions as to the problem


Hello, usually when you hear a squeeky sound coming from humidifier it is the bearings on the motor, the only option is to replace the motor for the humidifier. I will post a link to a aprilaire store that carries motors for humidifiers. www.aprilairehumidifierparts.com

Feb 19, 2011 | Aprilaire 700 Humidifier

1 Answer

How do I know my aprilair 760 humidifier is working?


A simple check you can perform on your aprilaire 760 is the following:
1) locate the two brown wires coming out of the 760 (these wires will be wired to tell the 760 to turn on when the hvac bower is on and the humidistat is calling for moisture).
2) temprarily disconnect the two brown wires from the external wiring and then short the wires together. All you're doing here is bypassing the your thermostat and bower-on indicator.

With the 70 unit plugged in to the wall outlet and the two brown wires connected together, both the fan and the solenoid valve (water inlet valve) should both be activated.

Dec 13, 2009 | Aprilaire 700 Humidifier

1 Answer

Aprilaire #224 celinoid not opening, water not flowing


it may be kickin on but you dont get water there is an metering device {little piece of plastic with hole} that cuts down on waste water it may be clogged to see if it is opening take a screwdriver and see if when humidastat is trying to work that you have a slight magnetic pull on the opposite end where water lines go

Feb 05, 2009 | Aprilaire 600 Humidifier

1 Answer

Water runs when furnace is off, but stops when furnace is on.


the 760 humidifier does not need a transformer wired externally. the 760 has its' own 24v transformer inside the fan compartment. this transformer will provide the power to enrgize the water solenoid as needed. it sounds like to me the additional trasnformer is hot all the time. when the furnace comes on, the unit gets power and the internal transformer is cancelling the power from the external transformer. this would explain why it quits running when the heat is on. since the external transformer is hot all time, when the heat shuts off, the solenoid is getting energized by the external transformer. to make this run correctly, you need to get rid of the external transformer. leave the humidifier high voltage wires hooked up so they are only hot when the furnace runs. if you have a humidistat that has a r and c terminal, you will need to wire these directly to the r and c on the furnace control board and move the switch inside the humidistat to "power". make sure it is not on "bypass". then wire your 2 brown wires from the humidifier to each of the "h" terminals on the humidistat. if you have a humidistat that only has 2 terminals, wire one brown wire to each of the terminals. this should allow it to run properly.

Jan 28, 2009 | Aprilaire 700 Humidifier

1 Answer

Aprilair model 760 does not go on


If you replaced the solenoid yourself make sure that is a 24VAC some solenoid are 120VAC and they look the same. to see if your humidifier is working you can short the 2 control wires coming from the humidifier I think the wires are brown or oa range. if you put then together the hum. should come on if is pluged in, if not then check your outlet see if you have 120AC plug in a lamp to check the outlet, if not your hum.may have a bad power supply you can get one at www.AppliancePartsPros.com/Parts

Dec 14, 2008 | Aprilaire 550 Humidifier

1 Answer

Aprilaire 550 humidfier not getting water


Is there 24 volts coming from the humidastat to the solinoid?

Dec 07, 2008 | Aprilaire 600 Humidifier

1 Answer

Model 760 Humidifier - need wireing diagram please....


I logged on to the April Aire website and found the wire diagram i needed.
they have really good information on all their units. thanks.sc.

Aug 18, 2008 | Aprilaire 700 Humidifier

1 Answer

Constant water flow


I have the same problem with a Aprilaire 760. I'm guessing it's a bad solenoid but want to hear that from someone who can confirm this.

Jan 30, 2008 | Aprilaire 550 Humidifier

1 Answer

Lots of water run-off from Aprilaire 760 Humidifier


HI would check the filter in side might need changing or cleaning clean out wter tray in side, it could be just a blocked filter , hope this helps

Jan 03, 2008 | Aprilaire 700 Humidifier

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