Whirlpool Freezer Too Cold
Quick answer: A freezer that runs far below 0°F (-18°C), freezes items rock hard, and frosts packages is usually the result of a control problem rather than a cooling problem.
- Unplug the refrigerator before testing any sensor or control.
- Handle frozen packages carefully; the edges of frosted items can cut.
- Do not chip at ice on the evaporator with tools; it can puncture the coil.
Why is my freezer too cold?
A freezer that runs far below 0°F (-18°C), freezes items rock hard, and frosts packages is usually the result of a control problem rather than a cooling problem. Common causes are a temperature control set too low, a faulty thermistor or thermostat that never signals the compressor to stop, a stuck damper, or a control board that keeps the compressor running.
Our fitment data covers 23,410 Whirlpool refrigerator models and 6,419 Whirlpool refrigerator parts, so the part links below are filtered to this brand; always confirm your model number before ordering.
Most Likely Causes, in Order
1. Temperature control thermostat
A cold control that sticks closed keeps the compressor running no matter how cold the freezer gets.
How to check: Turn the control to a warmer setting and wait 24 hours. If the temperature does not change, unplug the unit and test the control for continuity at both extremes; it should open at the warm setting.
Fix: Replace the temperature control thermostat. (Difficulty: Moderate)
Matching Whirlpool parts:
- Temperature Control Thermostat Kit 4387562 — $154.61 – $185.53 · 883 models
- Refrigerator Temperature Control Thermostat WP2200859 — $77.42 – $130.45 · 747 models
- Freezer Temperature Control Thermostat Assembly R0161092 — $98.11 – $202.24 · 689 models
2. Thermistor
A thermistor with drifted resistance tells the control board the freezer is warmer than it is, so the compressor never stops.
How to check: Unplug the unit, disconnect the sensor, and measure its resistance with a multimeter. Compare against the value on the tech sheet inside the unit; a reading far off at room temperature means it has failed.
Fix: Replace the thermistor. (Difficulty: Moderate)
Matching Whirlpool parts:
- Refrigerator Temperature Sensor WPW10383615 — $26.38 – $63.45 · 372 models
- Refrigerator Temperature Sensor WPW10331672 — $59.99 – $99.12 · 144 models
- Thermador Refrigerator Temperature Sensor 67001995 — $41.94 – $57.66 · 106 models
3. Air damper control
On many models the damper regulates how much freezer air flows to the fresh-food side; if it sticks, the balance between compartments goes wrong and the freezer overcools.
How to check: Find the damper where air enters the refrigerator section and watch it while changing the setting. A flap that never moves, or is frozen open or closed, is faulty.
Fix: Thaw the damper; if it still does not respond, replace the damper assembly. (Difficulty: Moderate)
Matching Whirlpool parts:
- Air Damper Control Assembly R9900109 — $81.72 · 668 models
- Damper Control Assembly R0161050 — $80.37 · 479 models
- Refrigerator Air Damper Control Knob W11026417 — $38.63 – $65.82 · 459 models
4. Main control board
A failed compressor relay on the control board can keep the compressor energized continuously.
How to check: Rule out the thermistor and damper first. If the compressor runs nonstop even with the control turned to warmest, and the sensor reads correctly, the board is the likely cause. Look for burnt spots on the board.
Fix: Replace the main control board. (Difficulty: Advanced)
Matching Whirlpool parts:
- Main Electronic Control Board WPW10312695 — $165.74 – $229.31 · 213 models
- Main Electronic Control Board W11035836 — $152.55 – $220.06 · 207 models
- Main Electronic Control Board W11088499 — $352.65 – $366.94 · 113 models
Other Whirlpool parts the catalog tags for this symptom
- Refrigerator Bimetal Defrost Thermostat WPW10225581 — $19.83 – $39.95 (overheating; temperature too cold; temperature too hot; won')
- Refrigerator Air Diffuser Assembly WPW10151374 — $36.58 – $54.45 (freezer too cold; fridge too warm; uneven cooling)
- Refrigerator Cold Control Thermostat WP819470 — $66.42 – $86.14 (overheating; temperature too cold; temperature too hot; won')
- Refrigerator Bimetal Defrost Thermostat WP4387503 — $17.02 – $42.31 (overheating; temperature too cold; temperature too hot; won')
- Compressor Kit W10309994 — $359.11 – $501.34 (fridge warm; loud noise; not cooling)
- Compressor Kit W10309990 — $290.35 – $389.92 (fridge warm; loud noise; not cooling)
Popular Whirlpool refrigerator models
Confirm the model number on the rating plate before ordering. Each model page lists every compatible part.
Frequently Asked Questions
What temperature should the freezer be?
0°F (-18°C). A few degrees colder does no harm, but -10°F (-23°C) or lower wastes energy and points to a control fault.
Can a freezer that is too cold make the refrigerator too warm?
Yes, on single-compressor models. If cold air is not being shared properly through the damper, the freezer may overcool while the fridge warms.
Why did it start after a power outage?
Some electronic controls reset to default settings or are damaged by a surge; check the settings first, then the thermistor and the board.
When to Call a Professional
Call a technician if the compressor keeps running with the control at the warmest setting and the thermistor and damper both test good; diagnosing a control board without a wiring diagram risks replacing the wrong part.