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Why does my dehumidifier run all the time?
less than a minute readApr 19Lyle Weischwill
If the dehumidifier runs continually and constantly collects water, it's likely that the dehumidifier's capacity is too low for the space; add another dehumidifier to the space to increase the water-collection capacity.
A defective humidity sensor can also cause the dehumidifier to run constantly. If the evaporator is iced up and not defrosting, you may need to replace the dehumidifier defrost sensor-, because the unit won't collect water if the evaporator is iced up.
If you see no frost on the evaporator while the dehumidifier is running, and the dehumidifier isn't collecting water, the dehumidifier may be low on refrigerant or the compressor may be defective. See the repairs below for ways to correct the problem.
These repairs may help solve your dehumidifier problem
Replace the dehumidifier evaporator thermistor
The evaporator thermistor is a temperature sensor on the evaporator coils. It communicates the temperature of the evaporator coil to the electronic control board; if the temperature is too low, the electronic control board detects excessive frost and begins the defrost cycle. If the thermistor isn't working properly, the electronic control won't defrost the coils. Replace the evaporator thermistor if it doesn't detect the evaporator temperature.
Dehumidifier evaporator thermistor
Find the required part specific to your product.
Jan 01
How to replace a dehumidifier sensor assembly
If your dehumidifier's bucket isn't filling with water, the sensor assembly might be the problem. Th…
Repair time and Difficulty
45 minutes or less
Replace the dehumidifier humidistat
The humidistat is a sensor on the front of the evaporator coil that monitors the humidity of the room air being pulled in through the evaporator. The humidistat communicates the humidity to the electronic control board through a wire harness connection. If the thermistor is defective, the electronic control won't properly detect humidity and dehumidify the room. Replace the humidistat if it doesn't sense the humidity.
Dehumidifier humidistat
Find the required part specific to your product.
Jan 01
How to replace a dehumidifier sensor assembly
If your dehumidifier's bucket isn't filling with water, the sensor assembly might be the problem. Th…
Repair time and Difficulty
45 minutes or less