Question about Aprilaire 400 Humidifier

1 Answer

Constant Red Light on Control Panel Circuit Board

Humidifier now does not work. The reset does not work. However there is now a constant red light illuminated on the circuit board within the humidistat housing.
Note - a cpmplete new HVAC system was recently installed.

Posted by on

  • OneMackGuy Dec 08, 2007

    Model is an Aprilaire 400.

×

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 13 Answers

The red light under the cover of the humidistat is fault light. This light typically indicates that there is an issue with your connection at the two wiring terminals labeled ODT on the humidistat. I would recommend checking to confirm that there is something currently connected to the two terminals. As a side note these two terminals can not be jumped out with a jumper, and must utilize either the outdoor temperature sensor (part 8052) or the manual mode resistor (part 4336).

Posted on Apr 23, 2010

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

We noticed the humidity went down to 30% and I adjusted the rate to increase Now our Aprilaire 400 says to change the filter. I did that, and it still says to change the filter. The furnace runs fine....


If your humidifier is equipped with a Digital Humidifier Control with Water

Panel change indicator, after replacing the Water Panel, turn the control

knob to the "Test/Reset" position until the "Humidifier On" light blinks to

reset its timer. (Blower must be operating and HVAC calling for heat.) Be sure

to turn the control knob back to it's original setting. If the "Humidifier On"

light continues to blink, your humidifier is in Test mode. DO NOT LEAVE THE
CONTROL IN TEST MODE OR HUMIDIFIER WILL NOT OPERATE.

Jan 27, 2011 | Aprilaire 400 Humidifier

1 Answer

I replaced the water panel on our aprilaire 600 humidifier. I adjusted the thermostat to call for heat to test it. When the dial (non-digital control panel for the humidifier) is turned to test/reset,...


Thank you for contacting us with regards to your model 600 Humidifier. The Change Water Panel indicator should flash when the control knob is set to the Test/Reset mode. The flashing indicates that the timer has been successfully reset. However, the humidifier should operate for the first 60 seconds of Test mode as long as your furnace is running. If your humidifier does not turn on, contact your installer. The humidifier may require service.
We appreciate the opportunity to be of assistance.
Sincerely,


Brett Phillips
Technical Support
Research Products Corporation

Nov 01, 2010 | Aprilaire 600 Humidifier

1 Answer

Humidifier filled with water, but red light is on


If you overfill it, the red light goes on. just dump a little out and it should go green. Worked with my crane duck humidifier. Hope it helps

Feb 01, 2010 | Crane Humidifiers

1 Answer

Humidifier control: red light is on. getting 24


the red light is lit because either you didnt install the manual mode resistor or your not using a out door thermostat but you have to hook somthing to the two terminals just to the right of the HH terminals

Dec 23, 2009 | Aprilaire 600 Humidifier

1 Answer

The red light is always on in my humidifier control panel. When I set it to test, I hear nothing clicking. No water runs into my humidifier. The unit (model 600) is about 6 years old.


if your using an outdoor thermostat then it may not be connected properly or the manual mode resistor wires are touching. these are connected on the humidistat just to the right of the H H terminals

Dec 12, 2009 | Aprilaire 600 Humidifier

1 Answer

The red ligt on with water inside


FROM TROUBLESHOOTING SECTION OF MANUAL:
Humidifier power light is staying red and not turning green Humidifier is working than stops: ? Ensure that water level sensor is assembled properly. ? Clean water float ? Call service center and request replacement water float

Jan 23, 2009 | Crane Frog EE-3191 1 Gallon Humidifier

3 Answers

Aprilaire 600 - change water panel light stays on


Turn the control knob to the test/reset position untill the change water panel light blinks to reset the change panel timer. Make shure the furnace is running calling for heat.Turn control knob to prior setting after resetting timer. Hope this helps.

Feb 16, 2008 | Aprilaire 600 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

1 Answer

Air-O-Swiss 7133


Okay, I just started getting this same deal with my 7133 on it's third season. I found in a blog that if you hold down the button that controls the heat while turning the mist knob on, it resets the machine. It worked. The red light went green and I turned off the heat button for cool air and the upper light still stayed green. Fingers crossed this continues to work. good luck!

Nov 27, 2007 | Air-O-Swiss 7133 Humidifier

Not finding what you are looking for?
Aprilaire 400 Humidifier Logo

980 people viewed this question

Ask a Question

Usually answered in minutes!

Top Aprilaire Humidifiers Experts

Paul Carew

Level 3 Expert

3313 Answers

jdthefixer

Level 3 Expert

744 Answers

Mack Baxter

Level 3 Expert

383 Answers

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

Answer questions

Manuals & User Guides

Loading...