Models > MDDQ40FW1 > Instructions

MDDQ40FW1 Frigidaire Dehumidifier - Instructions

All installation instructions for MDDQ40FW1 parts

These instructions have been submitted by other PartSelect customers and can help guide you through the dehumidifier repair with useful information like difficulty of repair, length of repair, tools needed, and more.

All Instructions for the MDDQ40FW1
1-8 of 8
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Unit would run continuously and not shut off

  • Customer: Jonathan from New Oxford PA
  • Difficulty: Really easy
  • Time to Complete: Less than 15 mins
  • Tools Required: Screw drivers
  • 3 of 4 people found this instruction helpful
Removed the front cover and then the humidistat from the bracket. Two push on wire connectors and then reversed. Very straightforward and excellent part matching. Given the prices for new dehumidifiers it was great to breathe life back into this unit which does its job well. Thanks for the easy to use web site and fast fast service!

Humidistat was inoperatative and the defrost thermostat.

  • Customer: Martin from Lords Valley PA
  • Difficulty: Really easy
  • Time to Complete: Less than 15 mins
  • Tools Required: Screw drivers
  • 4 of 9 people found this instruction helpful
Removed two screws holding the faceplate that held the humidistat. Removed knob, and two screws holding humidisat.. Removed two wires (push on terminals) . Reversed procedure to install new humididstat. Removed defrost thermostat from suction line, cut wires, installed new defrost thermostat, stripped wires, used wire nuts to connect control. Replaced faceplate..

We lost the water float. Needed a replacement

  • Customer: Bob from Omaha NE
  • Difficulty: Really easy
  • Time to Complete: Less than 15 mins
  • Tools Required:
  • 2 of 3 people found this instruction helpful
The float has two prongs that fit two snap fasteners on the reservoir tank. I just pressed the float prongs into the snap fasterners and inserted the reservoir tank into the dehumidifier. Turned the switch and pressto! We are in business.

The compressor would not run.

  • Customer: Linda from Gurnee IL
  • Difficulty: Easy
  • Time to Complete: 30 - 60 mins
  • Tools Required: Screw drivers
  • 3 of 7 people found this instruction helpful
I removed the cover, used a multimeter to test the compressor circuit, and found the compressor start relay to be defective.
Ordered a new one and installed it when it arrived.

Compressor was short cycling

  • Customer: Sherman from Tuttle OK
  • Difficulty: Easy
  • Time to Complete: 30 - 60 mins
  • Tools Required: Screw drivers
  • 3 of 7 people found this instruction helpful
Removed the cowling with a square drive screw driver, removed the spring clip from the cover of the compressor controls with a screw driver, pulled off the old compressor start relay and replaced it with the new part. Since other problems could have caused the compressor to short cycle this was a "replace the part and hope it would work" since that would be the most common reason and it was not a very expensive part.

Dehumidifier would not shut off

  • Customer: William from Allentown PA
  • Difficulty: Really easy
  • Time to Complete: 1- 2 hours
  • Tools Required: Nutdriver, Pliers
  • 2 of 4 people found this instruction helpful
First I pulled the top/side cover off. Disconnected the terminals from the old unit, unscrewed the old unit, and put the terminals on the new unit. Then I put the side/top cover back on, screwed the new humidistat unit into the front cover and then popped and screwed the front cover back in place. Customer service was excellent and order was received promptly as promised. Highly recommend Parts Select!

Dehumidfier wouldn't turn off.

  • Customer: Michael from Bethesda MD
  • Difficulty: Really easy
  • Time to Complete: 15 - 30 mins
  • Tools Required: Screw drivers
  • 2 of 5 people found this instruction helpful
First I removed the two control knobs and the two screws that hold the front cover in place and then the two screws that hold the element in place. I then pulled the element out about 3 inches and disconnected the two wires. Then I reconnected the new humidistat and put everything back together. Works just fine, now.

Humidifier would not shut off

  • Customer: John from Presque Isle MI
  • Difficulty: Really easy
  • Time to Complete: 15 - 30 mins
  • Tools Required: Screw drivers
  • 1 of 3 people found this instruction helpful
Removed cabinet and grill. Humidistat held in by 2 screws and a 3-wire harness. Dehumidifier working like a charm with the new part.
All Instructions for the MDDQ40FW1
1-8 of 8