Question about Aprilaire 700 Humidifier

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Aprilaire 700 Humidifier Doesn't work

I just discovered that my humidifier doesn't work and has never worked. When I opened it to change the element I found it was dry and in pristine condition. It has never been wet. Also nothing happens when I turn the dial to "test". I assume the wiring was done wrong when the unit was installed, but it is long out of warranty, so I need to find out how to check the wiring. Does anyone know of a place I can get wiring instructions and a diagram online?

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Check this website for a wiring diaghram Aprilaire 700 Repair Parts & Supplies
http://www.arnoldservice.com/Aprilaire_700_repair_parts_supplies.htm

Posted on Dec 08, 2008

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Problem with 2 ....1 on each furnance Aprilaire 700 Humidifiers.. no fan no soilinoid click red light on one when furnance is runing they both worked last year


Odd for both to be out. Check the water supply sometimes corrosion or scale will block the saddle piercing valve. Run it all the way into the pipe. Usually need to spin the little valve handle clockwise. Then back it all the way back to full open and reset humidifier power and furnace power. After that may want to crack open water supply connection right before the solenoid at each humidifier to make sure water is getting to them.

Nov 30, 2013 | Aprilaire 700 Humidifier

1 Answer

Doesn't turn on


Hello, check to see if you have 24 volts to the solenoid valve when the blower motor is on, if you do the solenoid valve is bad if not chevk to see where the voltage stops. Also, since tnis is a fan powered humidifier, the relay that energizes the fan could be bad aswell.

Nov 26, 2011 | Aprilaire 700 Humidifier

2 Answers

How do I know it is working?


Hello, You can tell if the humidifier is working if you see water flowing into the drain line. Also , when the furnace turns on you should here a click at the solenoid valve on the humidifier, this means that the solenoid is open and letting water into the humidifier.

Jan 22, 2011 | Aprilaire 700 Humidifier

1 Answer

Aprilaire 700. It works on fan on mode but not otherwise. It's never on and the humidity reading is always way below the setting. It should turn on automatically to bring the humidity up, right?


It appears your Aprilaire model 700 is wired to only operate when your HVAC fan is operated by your thermostat. Your HVAC installer can wire the humidifier control to operate the humidifier during a heat call, fan call or to turn on the fan when there is a need for humidification. Please contact your HVAC installer to have them change the wiring.

Thank you for giving us the opportunity to be of service
Sincerely,

Brad Uselmann
Technical Support
Research Products Corporation
www.aprilaire.com

Nov 01, 2010 | Aprilaire 700 Humidifier

1 Answer

Loud clicking and banging, A700 doesn`t work


You have a faulty humidistat

Greg Sunsetmech

Dec 13, 2009 | Aprilaire 700 Humidifier

2 Answers

Aprilaire 700 only works in test mode.


connect two wires at humidifier without any wirng connected if works problem is in wiring or humidistat

Oct 28, 2009 | Aprilaire 700 Humidifier

1 Answer

Aprilaire humdiifier not working


Does your humidistat have any dip switches or a small jumper wire? if it does try switching positions of the jumper or change dip switch. hope this helps

Jan 29, 2009 | Aprilaire 700 Humidifier

1 Answer

Aprilaire 700 Humidifier not working. Can it be repaired?


turn the humidistat back up, aand make sure if is still wired up.

Jan 18, 2009 | Aprilaire 700 Humidifier

1 Answer

Humidifier control .


if humidifier was wired into thermostat circuit for power instead of seperate transformer , this can happen. you need to see if you voltage going to the solenoid valve. if you do , and it isn't opening, the valve is bad . this is assuming that it is using a # 50 relay to come on only when the fan runs . . make sure the water valve is open

Dec 24, 2007 | Aprilaire 700 Humidifier

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