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Room air conditioner diagram
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Model # DM30J Official Haier dehumidifier
Here are the diagrams and repair parts for Official Haier DM30J dehumidifier, as well as links to manuals and error code tables, if available.
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Most common symptoms to help you fix your dehumidifiers
Choose a symptom to see related dehumidifier repairs.
Main causes: dirty air filter, clogged grill, dehumidifier placed too close to the wall, dehumidifier too small for the …
Main causes: lack of electrical power, wiring failure, electronic control board failure, user interface control failure…
Main causes: dehumidifier too small for the space, bad humidity sensor, faulty evaporator thermistor, low refrigerant, b…
Main causes: weak or dead batteries, out of range, radio frequency interference…
Main causes: room temperature below 65 degrees Fahrenheit, control system failure…
Main causes: clogged drain hose, drain hose not properly connected…
Main causes: loose fan motor mounting screws, loose compressor mounting bracket screws, bad fan, faulty compressor…
Main causes: collection bucket not installed, collection bucket full of water…
Main causes: collection bucket not installed correctly, cracked collection bucket, loose drain hose connection…
Most common repair guides to help fix your 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 t…
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
How to replace a dehumidifier sensor assembly
If the humidifier sensor doesn’t properly detect humidity or evaporator temperature, install a new sensor assembly, foll…
Repair difficulty
Time required
45 minutes or less
Effective articles & videos to help repair your dehumidifiers
Use the advice and tips in these articles to get the most out of your dehumidifier.
Learn how to repair broken, frayed or damaged wires in your appliances.…
Learn how to use a multimeter to check for wiring problems in an appliance that's not working…
Discover how a dehumidifier works.…