ApplianceField Lab
Field evidence

The Small Thermistor Pen Remained After the Expensive Parts

Boards, inverter and even the compressor had already been replaced. The KSSC48QVS02 finally worked after the separate diagram item called thermistor pen was identified and changed.

KitchenAid kssc48qvs02 OVERTEMPERATURE Compressor Will Not Start

The failed-repair sequence

  1. The compressor would not start and the overtemperature indication would not clear.
  2. Boards, inverter, compressor and a swollen bimetal had been replaced.
  3. A conventional RC thermistor was replaced with no change.
  4. Service tests 4 and 5 would not run.
  5. DC control and about 78 volts on each reported compressor phase were observed.
  6. The separate thermistor pen was replaced and the refrigerator worked.

A similar symptom can have a different cause on another refrigerator. The value here is the exact model, diagram item and reported result—not a claim that every no-start needs this sensor.

Why a normal thermistor replacement did not cover every sensor

The parts diagram listed another small sensor as thermistor pen, original part 2306010 and replacement WP2306010. Replacing the more familiar thermistor did not test or replace this separate input.

The case shows why a model-specific input list should be completed before repeating boards, inverter work or sealed-system replacement.

What to prepare for service

  • The full KSSC48QVS02 model and all prior part numbers.
  • Which service tests run and which do not.
  • Whether the compressor attempts to start.
  • The exact thermistor already replaced.

Orange County owners can compare the cooling pattern with KitchenAid service options in Orange County. A matching symptom helps prepare the visit but does not guarantee the same thermistor-pen cause.

Electrical and refrigerant safety: inverter outputs and compressor circuits are hazardous. Do not repeat the voltage tests or open the sealed system without qualified service.
Parts changed, problem stayed

A replacement that did not solve the fault

Includes a recorded replacement that did not help GE Café Dispenser Flap Opens When the Lower Door Closes A GE Café dispenser flap opens when a lower door closes. Failed boards and dispenser parts gave way to a confirmed embedded door-switch fault.
Unexpected turn

A repair that did not follow the obvious path

An unusual turn supported by the case record Viking VGSC3074BSS Overheated After a New Thermostat A Viking VGSC3074BSS climbed toward 500°F after a new thermostat. The failed replacement shifted diagnosis to selector and self-clean control branches.
Fresh field notes

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