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Customer Questions and Answers for Compressor Start Relay (Ptc) by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM18020691
Manufacturer Part Number: WP2262181

This PTC start relay mounts on the compressor and momentarily powers the start winding to get the motor running, then disengages for normal operation. Replacing a weak relay can stop repeated clicking and help restore cooling.

  • Provides initial boost to the compressor's start winding for reliable startup
  • Automatically drops out after startup so the compressor runs on the run winding
  • Helps address symptoms like warm temperatures, compressor clicking or humming without starting, or frequent overload trips
  • Failure may show as rattling, burn marks, or a melted relay housing
What's included: 1 PTC start relay Install notes:
  • Disconnect power and remove the rear access panel to reach the compressor
  • Allow components to cool; note wire locations and take a reference photo
  • Pull the old relay straight off the compressor pins; align and firmly seat the new relay in the same orientation, then reconnect wires
  • If your unit uses a run capacitor and/or separate overload protector, reconnect per the wiring diagram before restoring power

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Questions & Answers

For Whirlpool Compressor Start Relay (Ptc) (Part Number: OEM18020691)

1 Answer

Hello Bobby, The red wire connects to the overload, (white component with only one terminal), The two blue wires connect to terminals 3 and 1, (these are the run capacitor terminals), and the white connects to terminal 2.

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1 Answer

Kimberly, With these parts having been discontinued by the manufacturer there would be no suitable replacement available.

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Augie N for Model Number Kenmore Refrigerator Model #106.8678281

Refrigerator stopped working...light is on. Disconnected power supply and tried plugging back in 2 hours later. No noise, no click, nothing. Have parts with numbers FSP 1114291 with 2 terminals. FSP945507 with 2 terminals (#2 and # 3) (1 and 4 have no terminals) and part # FSP 945586 with 2 posts with red wires. Can one/all of these be the problem? Can a bad compressor cause this shut down without any noises when plugged in? Can these parts be tested outside of the appliance?

1 Answer

Augie, These listed parts will not be the issue with the unit. If there is nothing on in the unit other than the lights then you will want to look at the control panel in the refrigerator compartment and there will be a hole towards the back. This is the location of the defrost timer. There is a dial on the timer that you can put a flat blade screwdriver in and turn. It will only turn one direction, turn the defrost timer til it clicks. If the unit comes back on then the defrost timer will be the issue and will need to be changed.

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1 Answer

Teresa, according to the manufacturer the start relay part number WP2262181 is the correct replacement and will work on your model. Thanks!

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1 Answer

If the part number is the same as what you removed then it should be correct. The start relay for you model now comes in a kit with the overload part WP4387835 It's suggested to replace both.

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1 Answer

Hi. The wiring diagram shows the red wire from the overload connects to one side of the relay. The other side has a blue wire from the capacitor . The capacitor also has a red wire that piggybacks with the red wire from overload. You will need to connect the white wire to the side where the blue wire is on the relay. Relay part # WP2262181. Thank You.

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