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Customer Questions and Answers for Defrost Timer (Refrigerator) by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM18031698
Manufacturer Part Number: WP68233-2

The defrost timer controls your refrigerator's automatic defrost cycle, periodically pausing cooling to power the defrost heater. Replacing a faulty timer restores proper defrosting to help prevent frost buildup, temperature swings, and excessive run time.

  • Advances the system between cooling and defrost at set intervals
  • Sends power to the defrost heater, then returns the unit to cooling
  • Failure may cause heavy frost on evaporator coils and weak airflow
  • Fresh food section may run warm while the freezer ices over
  • Unit may run constantly, never defrost, or get stuck in defrost
What's included: 1 defrost timer Installation notes:
  • Disconnect power before servicing
  • Location varies by model; access the timer (often in the control housing or rear compartment), note wire positions, and transfer one at a time
  • Mount and secure the timer as originally installed; reuse existing bracket/fasteners
  • After reassembly, restore power and verify the unit advances through cooling and defrost

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Questions & Answers

For Whirlpool Defrost Timer (Refrigerator) (Part Number: OEM18031698)

1 Answer

Jerry, You will first need to pull out the knobs for the temp control. Once removed you will reach to the back of the cover and there will be 2 slots to put your finger. Pull down and forward in those spots and it should allow you to remove the panel to get to the defrost timer.

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1 Answer

Hello Jon. The defrost timer WP68233-2 is located inside the control panel of the refrigerator. You have to drop it down to access and replace the part.

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Stewart for Model Number msd2454grw

My freezer is not defrosting. I measured the heater element (24ohms)not shorted, thermostat room temp(236 ohms), thermostat in a cup of Ice with water(234 ohms). To do this, I placed a straight pin through the wire sleeve between the element and the thermostat. Is this the proper test procedure for this assembly, if so is it good? How can I test the defrost timer? there are 4 pins. What readings should I be getting, and across which pins. Also is there anything else that could be causing this problem?

1 Answer

Mary, This issue sounds like it is being caused by the defrost timer sticking and staying in defrost for too long of a period. The defrost timer WP68233-2 would be what you will want to replace.

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1 Answer

Hello Tommy. It sounds like you may have a defrost problem with the unit. Check and see if there is any frost build up on the evaporator coils in the freezer. If so, you will need to test the defrost heater and the defrost thermostat. They should read closed for continuity when cold. You can test this with a multi-meter TJMA-DMT3. I will include a link at the end to assist you how to use the multi-meter if needed. If both parts are good, you will need to replace the defrost timer. Once the problem is repaired, you will need to thaw out the ice on the coils before the unit will operate properly. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html

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1 Answer

Hello Scooter. The timer is back by the compressor. The evaporator is under the freezer flor inside the freezer.

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1 Answer

Hello Mike, The timer WP68233-2 is located inside the controls on the unit. You must disassemble the controls inside the refrigerator to access and replace the part.

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