December 18, 2014

What size dehumidifier do I need?

By Sears PartsDirect staff
How to determine what size dehumidifier you should have.
How to determine what size dehumidifier you should have.

Dehumidifiers are rated by how many pints of water they can remove from the air during a 24-hour period. To make sure you choose the right size of dehumidifier, consider two important things: how humid is the area you plan to dehumidify and how large is it?

First, see which of these descriptions best suits the area you want to dehumidify.

  • Moderately damp: Air sometimes feels damp and area has light, musty odor.

  • Very damp: Air always feels damp and has a musty odor.

  • Wet: Area feels and smells wet. Walls or floors sweat.

  • Extremely wet: Floors and walls are wet.

Then use the chart below to determine what size of dehumidifier would work best for you.

How damp is your space?2,000 or less sq.ft.2,000–2,500 sq.ft.2,500–3,500 sq.ft.3,500 or more sq.ft.
Moderately damp25 pint30 pint35 pint40 pint
Very damp30 pint35 pint45 pint50 pint
Wet35 pint40 pint50 pint60 pint
Extremely wet40 pint45 pint60 pint70 pint

Symptoms common to all dehumidifiers

Choose a symptom to see related dehumidifier repairs.

Main causes: collection bucket not installed correctly, cracked collection bucket, loose drain hose connection
Main causes: clogged drain hose, drain hose not properly connected
Main causes: room temperature below 65 degrees Fahrenheit, control system failure
Main causes: weak or dead batteries, out of range, radio frequency interference
Main causes: lack of electrical power, wiring failure, electronic control board failure, user interface control failure
Main causes: dirty air filter, clogged grill, dehumidifier placed too close to the wall, dehumidifier too small for the space
Main causes: collection bucket not installed, collection bucket full of water
Main causes: loose fan motor mounting screws, loose compressor mounting bracket screws, bad fan, faulty compressor
Main causes: dehumidifier too small for the space, bad humidity sensor, faulty evaporator thermistor, low refrigerant, bad compressor

Repair guides common to all dehumidifiers

These step-by-step repair guides will help you safely fix what’s broken on your dehumidifier.

How to replace a dehumidifier electronic control board

If the dehumidifier won’t power up because the control board has failed, use the steps in this repair guide to replace the electronic control board and fix your dehumidifier.

Repair difficulty
Time required
 45 minutes or less
How to replace a dehumidifier user interface control board

If the dehumidifier doesn’t respond when you try to set it, follow these steps to replace it.

Repair difficulty
Time required
 30 minutes or less
January 1, 2014
By Lyle Weischwill
How to replace a dehumidifier sensor assembly

If the humidifier sensor doesn’t properly detect humidity or evaporator temperature, install a new sensor assembly, following these steps.

Repair difficulty
Time required
 45 minutes or less

Articles and videos common to all dehumidifiers

Use the advice and tips in these articles to get the most out of your dehumidifier.

December 16, 2015

Using a wiring schematic to trace a current video

By Sears PartsDirect staff

Find out what’s wrong with your appliance by following a circuit.

December 9, 2015

How to read a wiring schematic video

By Sears PartsDirect staff

Learn how to decipher symbols so you can buy the right part for your problem.

December 18, 2014

What size dehumidifier do I need?

By Sears PartsDirect staff

Get help deciding what size of dehumidifier to buy.