Electrical Projects The starting relay (located under the hood) is a current-operated relay used to start the motor. To test the assembly, pull the relay off of its terminals. Then:

a. Test for continuity between the "run" terminal and the "common" of the relay. If open, replace the relay.

b.   Connect a jumper between the compressor "run" terminal and the "run" terminal of the starting relay.

c. Connect a voltmeter to the "start" terminal of the relay and the "common" terminal of thermostat.

d. Turn the humidistat to its maximum pos tion.

e.  Plug in the cord. If the relay is good, a click will be heard as the relay closes and full voltage will be indicated.

f. A negative test means a defective relay or compressor.

The compressor is a sealed unit. If defective, the complete dehumidifier must be returned to the factory. To test the compressor, connect an ohmmeter across the terminals of the compressor. The readings vary between makes and models, but should not exceed 15 ohms between any pair of terminals.





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Home > Electrical Projects > Repairs > Dehumidifiers

May 19, 2012