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April aire 1700 will not work when i run test mode it kicks on and runs thru modes humidity in basement is thru the roof

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Replace the control circuit board.

Posted on Jun 26, 2009


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I have a Whirlpool AD70U dehumidifier with type 3 controls. I have the fan set to auto and the humidity to normal. The unit drains into a floor drain. It seems dry in my basement yet the fan seems to run...

If it's set for Continuous Mode the fan will run all the time. It does so, in an effort to keep recycling the air. Once it senses a rise in humidity, the compressor turns ON. Check the settings, to be sure it's where you think. Also, check and clean the air filter, if necessary. Before removing the filter, be sure to turn the Master ON/OFF Switch to OFF and unplug the unit from the wall outlet. If you wash the filter, it most be completely dry, before reinstalling it. Do Not operate the unit without the air intake filter installed.

Make sure you are maintaining at least 12" - 18" clear air space around the entire unit.

To further assist you, in case you have misplaced your Owner's Manual. I have included a link to it, that you can download and print for future reference.

I hope this helped you to further troubleshoot and solve the problem.

Jun 21, 2011 | Whirlpool AD70U Humidifier

1 Answer

Aprilaire 600 - water flow stopped to unit when running - chk'd lines and all ok - will run in manual mode on hudmidifer control (pt # 56) but with outside temp sensor connected seems to not register to...

Doesn't the float valve on the water sump control the level of water in the sump?

Do you have water to the valve? (Like loose the nut on the tubing-- does water come squirting out?)

If not, you can't get humidity into your system, without water in that sump or pan!
The mat can be turning-- but if it is not SOAKING WET!-- you get no humidity in the house!.

Could the main shut off valve be plugged?--

Bottom line is-- the Humidifier needs a steady supply of water-- It will go thru gallons of water every day, this time of the year!

Mack B

Jan 26, 2011 | Aprilaire Humidifiers

1 Answer

Aprilaire Humid. Model 560 - not working even though water is on

Make sure the heat is running during test.Does the pump make noise.The control shoud make a soft click when u turn the knob on/off.

Mar 07, 2010 | Humidifiers

1 Answer

Our Aprilaire is over 14 years old. Two

If your humidifier is working properly, then the problem lies outside of the humidifier. For example how long does your furnance run when the thermostat calls for heat? If your furnace is oversized for your home, it will heat your home relatively quickly, and turn off, while your humidifier does not have a chance to work long enough for it to increase the humidity. If this is the case, you could try to set the thermostat to run the fan in manual mode instead of automatic. This will give the humidifier a chance to increase the humidity.

Hope this helps.

Jan 08, 2010 | Aprilaire Humidifiers

1 Answer

Dry house, albeit have two april aire humidifiers

The reason you can not run your humidifier while the blower is off, is because all the humidity would condense almost immediately and rot out your duct work. If you find that the humidity provided during the cycle of your furnace is inadequate, I would suggest purchasing a table top unit, and keep it in the room where you spend the most time. So, the answer to your question is no, you can not run a humidifier while your blower motor is off. Hope this helps.

Dec 13, 2009 | Aprilaire 700 Humidifier

1 Answer

Water only runs with humidistat in test/reset mode. Aprilaire 600 with an Aprilaire 56 Automatic Humidistat, both about 5 years old. Water line is clear, and test mode runs fine for the 1 minute interval....

you need to make sure your humidity level in the house isnt higher then what your humidifier will provide at any givin outdoor temp. this chart is in the owners manual. you cant remove the wires going to the ODS or it will give an error unless you have a resistor to put in its place. Anyway if the humidifier works in test mode according to AA it works so you may have higher humidity than you think, the highest your gonna get is 45% as the temp outside drops it will allow less humidity so it doesnt cause window condinsation (property damage) here is a copy of the chart. the #s on the left are the dial setting
TABLE 2 – % Relative Humidity Guide
Outdoor Temperature (°F)
-10°F 0°F 10°F 20°F 30°F 40°F
10% 10% 10% 15% 20% 25%
2 10% 10% 15% 20% 25% 30%
3 10% 15% 20% 25% 30% 35%
4 15% 20% 25% 30% 35% 40%
5 20% 25% 30% 35% 40% 45%
6 25% 30% 35% 40% 45% 45%
7 30% 35% 40% 45% 45% 45%

Nov 28, 2009 | Aprilaire 600 Humidifier

1 Answer

Testing a Aprilaire Humidifier 600 Controller

if it works in the test mode then it should be okay but you can get a humidity gauge from radio shack and set in the house to see how high or low its is. the humidifier is only going to give a max of 45% humidity

Nov 27, 2009 | Aprilaire 600 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

1 Answer

Aprilaire 500A does not add moisture

If your your solenoid will work it in test mode it is probably your Humidistat.

Nov 14, 2008 | Aprilaire 550 Humidifier

1 Answer

Not operating-controller questions

are you having problems with your fan blade rotating in the wrong direction? Is yours pushing or pulling water through the water panel? I am very unhappy with my humidity levels in my house.

Nov 02, 2008 | Aprilaire 700 Humidifier

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