Difference between revisions of "Test a Refrigerator PTC Relay"
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A PTC (Positive Temperature Coefficient) relay is a starting device for fridge compressors. It is responsible for powering the start winding for a brief moment to help start up the fridge compressor motor. If your fridge cannot start there is a high probability that the PTC relay is defective. This article presents how to test them to determine whether they need replacing. Luckily, these common fridge parts are relatively inexpensive and easy to replace. | A PTC (Positive Temperature Coefficient) relay is a starting device for fridge compressors. It is responsible for powering the start winding for a brief moment to help start up the fridge compressor motor. If your fridge cannot start there is a high probability that the PTC relay is defective. This article presents how to test them to determine whether they need replacing. Luckily, these common fridge parts are relatively inexpensive and easy to replace. | ||
| − | [[Category:Refrigerators and Freezers]] | + | [[Category: Refrigerators and Freezers]] |
== Steps == | == Steps == | ||
#Expose the back of the fridge to get access to the motor. Make sure the appliance is unplugged. | #Expose the back of the fridge to get access to the motor. Make sure the appliance is unplugged. | ||
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#Use a multimeter to measure resistance across all the pairs of the connectors on the underside of the PTC relay. Only one pair should give you a reading - it should be between 10 - 100 ohms. If you can't get any reading at all make sure you set the multimeter on the lowest resistance or Continuity range and repeat the measurements. If you still get no indication of continuity, the PTC relay is broken. | #Use a multimeter to measure resistance across all the pairs of the connectors on the underside of the PTC relay. Only one pair should give you a reading - it should be between 10 - 100 ohms. If you can't get any reading at all make sure you set the multimeter on the lowest resistance or Continuity range and repeat the measurements. If you still get no indication of continuity, the PTC relay is broken. | ||
#If you determined that it is broken, note the part number and order a replacement. | #If you determined that it is broken, note the part number and order a replacement. | ||
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== Tips == | == Tips == | ||
