Question about Aprilaire 700 Humidifier

Open Question

Model 760 fan not running

Water runs through but the fan is not starting. Please don't tell me I need a new one. Thank you for your help.

Posted by on

4 Suggested Answers

  • 1 Answer

SOURCE: 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.

Posted on Aug 19, 2008

  • 232 Answers

SOURCE: Water does not stop.

soliniod may be stuck. you will need a volt meter to test

Posted on Sep 13, 2009

  • 52 Answers

SOURCE: I installed a 700A model on my furnace (does not

try tying the 2 yellow wires together that come out of it and as long as door is on properly and unit is not defective it should start if not most likely the control board inside is bad

Posted on Dec 19, 2009

  • 43501 Answers

SOURCE: I have an Aprilaire Model

The solenoid valve has gone bad and is not closing properly...

here is the part you need

It really should not be hard to replace.and will only require a few hand tools to do it...


Posted on Jan 16, 2011

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


1 Points

Related Questions:

1 Answer

Model 760 Aprilaire makes a loud noise when running. It almost sounds like the blade is hitting something. Its 10 years old !! I built the house so if you can tell me for sure what it is I'm sure I can fix...

I think you're on the rate track. If it's ten years old the blade and.or the shaft may be worn out. Turn off the water line feeding the humidifier.Turn off the electricity to the unit. Drain the tank, open he tank cover and try spinning the blades with your hand. That way you can tell and see what its rubbing against and if it can be repaired. But, if it's 10 years old, parts may not still be available for that specific model.

Good luck. Hope that helps.

Feb 11, 2011 | Aprilaire 700 Humidifier

1 Answer

Solenoid on Aprilaire whole house humidifier

the solenoid allows water to flow to jet that then runs down the pad the solenoid is control by the stat

Feb 23, 2010 | Aprilaire 700 Humidifier

1 Answer

I installed a 700A model on my furnace (does not have a bypass but has a fan built in). It is insallted on the supply side per the instructions. The "humidifier on" light is on when the funace is running....

try tying the 2 yellow wires together that come out of it and as long as door is on properly and unit is not defective it should start if not most likely the control board inside is bad

Dec 16, 2009 | 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

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

Water does not stop.

soliniod may be stuck. you will need a volt meter to test

Dec 13, 2008 | Aprilaire 700 Humidifier

1 Answer

AprilAire 760 not running after installing new circuit board

I called the service company that put in my new furnace (FAmily Heating and Cooling in Detroit, very highly recommend these people)

Anyway they sent out a second service tech who determined that I would be better off having the humidifier wired to go on whenever the furnace fan was running instead of using the humidifier signal from the circuit board on the furnace. After he changed the wiring the unit runs fine. It is pretty likely that the circuit board was bad also.

Nov 27, 2008 | Aprilaire 700 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

6 Answers

Water dripping from unit

if the water panel needs to be replaced , this can happen. instead of going through the panel , water will run on the outside of the panel and drip through the seems on the humidifier cover. make sure the plastic hose that goes into the water panel is inserted into the water panel.

Dec 27, 2007 | Aprilaire 700 Humidifier

1 Answer

Aprilaire 760 Humidifier water continues to run

You need to determine whether the problem is in the solenoid or in the furnace electronics. You could put a voltmeter on the solenoid connection to see if the furnace is still holding the solenoid open after the blower stops. This will tell you whether it is the solenoid or not.

Feb 18, 2007 | Aprilaire 700 Humidifier

Not finding what you are looking for?
Aprilaire 700 Humidifier Logo

Related Topics:

60 people viewed this question

Ask a Question

Usually answered in minutes!

Top Aprilaire Humidifiers Experts


Level 3 Expert

1033 Answers


Level 3 Expert

1751 Answers

Barrett Palumbo
Barrett Palumbo

Level 2 Expert

1772 Answers

Are you an Aprilaire Humidifier Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides