Question about Fedders A7DH45B2A Dehumidifier

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Need wireing diagram

Fedders window unit Mod: 15cm44h-a, S/N: 18l936828
No Heat. Thermostat is closeing, Switch closes but shows 45 ohms resistance, Should be 0. Not sure if switch is bad. need wireing diagram to properly troubleshoot. Electrical element is good.
Help please

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HD456E dehumidifier shows it is on but nothing happens - no compressor running. The humidity is 75% in basement and have it set to run at 45%. Any possible fix or is it time to replace eventhough it is...

You can normally hear a humidistat open and close if you listen closely. Also, the water tank has either a float or pressure switch that will shut it down.

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The 45% setting is too low and the setting is never satisfied, so the unit keeps running to try and reach 45%. Try setting to 50 or 55, this is a very comfortable range. I was not clear on the room temperature being at 55 degrees. Is this what your thermostat is set to or is this the actual room temperature. Brrrrrrrrrrrr

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Frost build up on a dehumidifier maytag model M7D45B2A A-R. Built up again after completely defrosted and built up again after cleaning filter and unit.

The model you have was made for Maytag by Fedders. Unfortunately, Fedders as you knew them, when you purchased the unit, is no longer in business.

The part you need to replace is CRCFD2518-020- Pc board w/auto restart dehumidify and with anti-icing thermostat (defrost thermostat). this unit also include the humidistat control. However, that part is no longer available and there are no substitutions for that part.

Don't feel bad. This part was also used by many other name brand manufacturers and is no longer available for their dehumidifiers ether.

I'm really sorry, I wish I had better news for you.

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Since I answered your similar question earlier and now have more details on what happened. Shorting out the bucket full switch, more than likely caused more electronic problems in the control board.

However, there is one thing you can try. Turn the Master ON/Off Switch to OFF. Unplug the unit for 15 minutes. After the time has elapsed, plug the unit back in, turn the Master ON/OFF Switch to ON and hopefully, the electronics will have reset themselves during that time out. Before doing any of this, make sure the bucket' float valve is in the DOWN position.

If the above doesn't solve the problem and you decide you want to replace the control panel electronics go the link below, to find the closest Haier Parts Dealer to you.

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First check the water collection bucket, to make sure it's properly seated and making contact with the safety switch. Also check the humidity level you have the unit set on. It may be to high for the humidity level in your house. Reset the humidity level to either minimum or if you have an LED screen 45%. Remember, the lower the setting, the more humidity will be removed.

To do an in home test of the unit, move it to a bathroom. Turn the unit ON and set the humidity level to it's lowest level. Turn the shower ON hot enough to generate steam. Do not turn the bathroom's exhaust fan on. As you exit the bathroom, close the door. Wait 15 to 20 minutes and turn the shower OFF. Allow the dehumidifier to run for several more minutes, before checking the water collection bucket for water. If you find any water in the bucket, it's working as it should. If not, it's time to replace the unit. Under most circumstances, I would suggest possibly repairing it. But, Fedders is out of business and replacement/repair parts are a scarce as hen's teeth.

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First, make sure the humidistat isn't set too high by adjusting it to the lowest humidity setting and running it again. Next, test the dehumidifier by placing it in a closed bathroom with a hot shower running. If you don't see water collecting in the unit after several minutes, turn the unit off and clean all dehumidifier filters and coils. If, after adjusting the settings and cleaning the unit, you still don't see water collecting, you may have a refrigeration issue. This situation will have to be addressed by a qualified technician.

Take care.

Aug 11, 2010 | Fedders A7DH45B2A Dehumidifier

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