How To Safely Test An Evaporator Fan
If your refrigerator is not keeping cool, then the fan is the only component that needs to be scrutinized for troubleshooting purposes. A loud blowing sound from the refrigerator motor doesn't necessarily mean that it is completely faulty. Sometimes simply repositioning the entire refrigerator will remove such noises.
Do You Need to Test the Fan?
If there are no strange noises, yet you hear no noise from the fan, and the evaporator motor and its lights appear to be working, that is an indication that there is a fault with the fan. The first thing to do in this situation is to test the fan in order to rule out any existing fault with the wiring or control panel.
Conducting a Continuity Test on an Evaporator Fan
To administer a continuity test, you will need a multimeter set to measure resistance (called Ohms) for the desired range specified according to the evaporator fans' product specifications.
Once the multimeter is correctly connected and switched on, if you notice a low resistance reading, typically anything less than 100 Ohm, then the charge produced by the testing unit is flowing normally, and the coil is working fine. However, if the reading is quite high or an infinite resistance reading is noted, then there is a connection separation someplace, meaning the evaporator coil is defective and the whole fan needs replacing.
If the evaporator fan passes the multimeter continuity test, it is at this point to call a licensed electrician to assist further with the wiring.
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