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Customer Questions and Answers for High Limit Thermostat by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM18050235
Manufacturer Part Number: WPW10195091

The High Limit Thermostat is an OEM part for Whirlpool dishwashers. It is a safety device that monitors the temperature inside the dishwasher and cuts off power to the heating element if the water temperature exceeds safe levels, preventing overheating and potential damage.

Causes of a bad high limit thermostat can include normal wear and tear, exposure to high temperatures, or electrical faults. A faulty thermostat can prevent the dishwasher from heating water correctly, affecting the cleaning performance.

Symptoms of a bad high limit thermostat include:

  • Dishwasher not drying dishes properly
  • Dishwasher not completing cycles
  • Water not heating up during cycles
  • Error codes related to temperature issues

This OEM part is also compatible with Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore models.

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Questions & Answers

For Whirlpool High Limit Thermostat (Part Number: OEM18050235)

1 Answer

Tony, the hi limit thermostat is rated at 207 dgrs. F. at 190 dgrs.F. it would have remained closed(hold it in a pan of boiling water for a minute or so, and recheck it). Based on your description, you may want to check the water level in the center bottom of the tub should be at least 1/2 in. deep-(3/4 in preferred) if there's not enough water to properly circulate and "cool" the heater element it can warp. Thanks,

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1 Answer

Hello Matt, the heater element has a high temp limit thermostat WPW10195091 it is held against the bottom of the tub underneath. As far as the leak check the spray arms for cracks,splits, wear, esp on the spray arm outlet mountings, if ok the lower door seal is replaceable WPW10497235.

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1 Answer

Bobby, With the thermostat and heater checking ok then this issue will be a faulty control board.

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1 Answer

Darvin, Test the thermostat for continuity and if it is good then this will be a control board issue and would need to replace part number W10595569.

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1 Answer

Hello Jon. If both are new, then the control board will need to be replaced if the unit is not drying the dishes. It should dry them unless the heated dry option is turned off. Then that will turn off the heater on the unit.

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1 Answer

Hello Jon. SERVICE DIAGNOSTICS NOTES 1 To invoke the Diagnostics Cycle, perform the following while in standby: ¦ Press Start key to wake up control panel. ¦ Press any 3 keys in the sequence 1-2-3-1-2-3- 1-2-3 with no more than 1 second between key presses. ¦ The Service Diagnostics Cycle will start when the door is closed. ¦ To rapid advance 1 interval at a time, press the Start/Resume key. Rapid advancing may skip sensor checks as some checks require 2 complete intervals. NOTE: While in the Diagnostic Cycle, the Start/ Resume feature is turned off (for example, Auto Resume after door interrupts) and the Start/Resume key becomes an interval advance key. ¦ Invoking Service Diagnostics clears all status and last run information from memory and restores defaults. It also forces the next cycle to be a sensor calibration cycle. ¦ Last run cycles and options returned to default (Normal cycle with Heated Dry option). ¦ Last run delay returns to the lowest delay increment. ¦ Calibration cycle may force an extra rinse to occur prior to Final Rinse (to assure clear water), then calibrates the OWI and the fill amount during the final rinse. ¦ Operating state returns to Standby upon completing or terminating the Service Diagnostics Cycle. 2 Turn on all LEDs immediately upon receiving the entry sequence (even if the door is open) and throughout this first interval as a display test. 3 Diverter will be on continuously in interval 14. In all other diverter intervals, diverter will only be on until it reaches the intended position for that interval. 4 Press Hi Temp key in this interval to clear customer error history. ¦ If Hi Temp key does not respond, the control panel is in “Sleep Mode,” open and close the door to wake up the control panel and then press Hi Temp to clear the customer error history. 5 Thermistor (temperature sensor) checks - turn clean LED on if thermistor is in its normal temperature range (32°F to 167°F [0°C to 75°C]). Turn sanitized LED on if fill temperature is above 85°F (30°C). 6 OWI (optical soil sensor) checks: ¦ Check OWI sensor for the presence of water during the 5 sec. pause in interval 16 and turn on the Clean LED in interval 15 if water detected. ¦ Check OWI sensor for presence of bulk soil during pause interval 13 and turn on the Clean LED in interval 12 if bulk soil detected. ¦ Drain until OWI sensor sees the presence of air or a max. of 1:52 during interval 5 and turn on the Clean LED in interval 4 if air detected. 7 DC Fan Motor is on during upper rack washing intervals. 8 Turn off all LEDs during pause prior to displaying error codes. 9 Pause to allow for cold first fill detection.

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1 Answer

Jon, You will want to make sure that you are using a rinse aid and if you are and still not drying then also make sure that the dishes are not being left closed overnight. This could cause moisture to recollect on the dishes. If this is not the case then either the vent is not opening or the control board is the issue.

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1 Answer

Harry, If the vent door is not closing then this will be a vent issue and will need to replace the vent. The part number needed will be WPW10469574.

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Paul for Model Number WDF750SAYW3

My whirlpool dishwasher has been having issues cleaning the dishes. I ran the diagnostic mode on it and I'm getting a calibration error on the OWI (turbidity sensor) and an error saying the dishwasher automatically shut off the heater because of an error. My guess is that since the OWI also houses the thermostat for the dishwasher that when the calibration fails the heat gets shut off. Does this sound right? How would I test the sensor to see if it is the cause of my problem?

1 Answer

Paul, You can test the thermistor in the OWI by accessing the control board and go to the P12 connector and disconnect it from the board. Test pin 1 to pin 3 for 46K to 52K ohms of resistance at 77 degrees. If the resistance is not correct then replace the OWI and yes this OWI being faulty will cause the heater to not work.

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