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My aprilaire 760 not working, water flows normal but fan not working, i connected motor to wall outlet and it runs good, is their a sencer not working. thanks Rob

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6 Suggested Answers

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Posted on Jan 02, 2017

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JMuskovitz
  • 135 Answers

SOURCE: 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.

Posted on Feb 19, 2007

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tborn6
  • 700 Answers

SOURCE: Aprilaire 600: water only runs in "Emergency" Heat mode

When your unit is on normal the outside unit works and the inside only the fan runs. your heat pump does not remove any humidity when it operates so the installation cotractor did not wire it to operate then. you can change the wiring on the humidifier to operate all the time by wiring it to the fan (g) terminal then it should work just turn it all the way to the lowest humidity when you are in cooling mode.

Posted on Jan 11, 2009

  • 17 Answers

SOURCE: Fan running but no water flow

the humidistat on this unit just acts as a set of dry contacts. with the humidifier plugged in, you should be able to touch the 2 brown wires by the water solenoid together and get the power fan to run and the water solenoid to enrgize. if you do this and water does not flow, you most likely have a bad water soenoid. it is either electrically bad, or just plugged with water deposits. sometimes you can pull it apart and clean it, sometimes you just have to replace the solenoid.

Posted on Jan 27, 2009

  • 1 Answer

SOURCE: water keeps running into humidifier even furnance blower is not

This sounds like, the 550 transformer is not connected to the blower motor power connection (in parallel)

Posted on Mar 04, 2009

  • 189 Answers

SOURCE: Aprilaire 760 furnace humidifier makes a loud screeching sound.

A bad circuit board should not make any noises. A bad solenoid valve could make a loud buzzing noise. If the noise is a squealing noise then you have defective bearings in the blower motor.
If you disconnect the low voltage wiring from the solenoid valve and you still hear the noise, then its not the solenoid valve.

Posted on May 10, 2009

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1 Answer

If i hook my Aprilaire 400 Manual (not auto/digital) humidifier up straight to a 24v wall outlet instead of to the furnace, will it still work correctly? Or does it need to be powered by the furnace to...


Your humidifier is a bypass type. The only voltage needed is 24vac to open the water valve. Air only flows through the humidifier when the furnace blower is running, and the wet pad will add very little humidity if the furnace is not running and heating the air before flowing through the wet pad in the humidifier.
It is best the water valve is only energized when the furnace is running. Some furnaces have a connector on their control boards labeled HUM for this purpose. Test it's voltage when the furnace is running because some will output 110vac instead of 24vac you need.

Jan 31, 2013 | Aprilaire 400 Humidifier

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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

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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

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Aprilair 760 Humidfier will not stop water flow to EV panel


If the water continues runs nonstop even when the heater is turned off, you might have either a bad solenoid valve or a bad humidistat. Simply disconnect one of the two low voltage wires going into the unit. If the water turns off then your problem is most likely your humidistat or the low voltage wiring. If the water continues to run even when the low voltage is disconnected you have a defective solenoid valve.
Good luck.......

Apr 09, 2009 | Aprilaire 700 Humidifier

1 Answer

Water keeps running into humidifier even furnance blower is not


This sounds like, the 550 transformer is not connected to the blower motor power connection (in parallel)

Feb 19, 2009 | Aprilaire 550 Humidifier

1 Answer

Aprilaire 600: water only runs in "Emergency" Heat mode


When your unit is on normal the outside unit works and the inside only the fan runs. your heat pump does not remove any humidity when it operates so the installation cotractor did not wire it to operate then. you can change the wiring on the humidifier to operate all the time by wiring it to the fan (g) terminal then it should work just turn it all the way to the lowest humidity when you are in cooling mode.

Jan 07, 2009 | Aprilaire 600 Humidifier

2 Answers

Aprilaire 760 won't start


No. when you remove the front cover it will automatically disconnect the power supply. Try changing the water panel and cleaning out the orifice and filter screens located in the water lines connected to the solenoid valve.

Dec 26, 2008 | Humidifiers

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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