Refrigerator Not Cooling Consistently? Thermostat Kit 333XP – Fix Temperature Control Failure Fast
If your refrigerator or freezer is running too warm, too cold, cycling constantly, or not cycling at all, a failed temperature control thermostat is the most common cause. In most single and multi-door refrigerators and freezers, the cold control thermostat monitors compartment temperature and signals the compressor to cycle on and off to maintain the set temperature. When it fails, the compressor either runs continuously (freezing everything) or stops cycling entirely (allowing food to warm). ⚡ Common failure point across a wide range of refrigerator and freezer platforms. Part 333XP is the premium XPart universal thermostat kit that replaces K50-P1117 and WPF29R-103-022 and restores accurate, stable temperature control immediately.
❓ Is This the Right Part?
This is the correct fix if ALL of the following are true:
- ✔ Refrigerator/freezer powers on and compressor runs (or ran recently)
- ✔ Condenser coils are clean and condenser fan is confirmed working
- ✔ Door gaskets seal correctly — no visible gaps or tears
- ✔ Evaporator fan confirmed running and airflow is present in the compartment
- ✔ ONLY problem is temperature too warm, too cold, or compressor not cycling correctly
Not sure? Send us your model number — we’ll confirm before you order.
🔧 Common Symptoms
- Refrigerator not cold enough — food spoiling faster than normal
- Freezer or fridge too cold — items freezing that shouldn’t be
- Compressor runs continuously without cycling off
- Compressor won’t start even though the unit has power
- Temperature fluctuates widely regardless of thermostat dial setting
- Thermostat dial turns freely but has no effect on compartment temperature
✔ If these symptoms match, the temperature control thermostat is the most likely failed component in the system.
✔ In most cases, replacing the thermostat restores accurate, stable temperature control immediately.
📦 Part Details
- Part Number: 333XP (XPart universal thermostat kit)
- Type: Universal cold control thermostat kit — temperature sensing switch with capillary tube for refrigerator and freezer compartment control
- Replaces: K50-P1117, WPF29R-103-022 (no modification required for compatible applications)
- Compatibility: Universal fit — suitable for a wide range of refrigerator and freezer models across multiple brands. Verify your existing thermostat’s temperature range and capillary tube length before ordering.
A failed defrost timer or heavily frosted evaporator coils can produce identical symptoms to a failed thermostat — confirm the thermostat is the root cause before ordering. If the evaporator is iced over, defrost manually first and retest temperature cycling before replacing the thermostat.
⚙️ Installation
Skill Level: Moderate — 20–40 minutes. Unplug the refrigerator before beginning. Locate the thermostat housing inside the fresh food compartment (typically behind the temperature control dial panel). Disconnect the wiring harness and remove the capillary tube from its clip path through the evaporator area. Route the new thermostat’s capillary tube along the same path, connect the wiring harness, and secure the housing. Restore power and allow 2–4 hours for the compartment to stabilize before confirming correct cycling.
✓ Compatible Models
Universal fit — compatible with a wide range of refrigerator and freezer models that use the K50-P1117 or WPF29R-103-022 thermostat. Contact us to verify your model number before ordering.
💡 Pro Tip
Before ordering, turn the thermostat dial to its coldest setting and listen for the compressor to start — if it starts, the thermostat is likely the issue. If the compressor doesn’t start at all, the problem may be the start relay or compressor itself. A $5 multimeter test across the thermostat terminals (should show continuity at coldest setting) confirms the diagnosis in under 2 minutes and prevents an unnecessary part order.
✓ Model-Specific Repair Pages
✅Compatibility & Cross Reference
Not sure about your model number? Call 1-877-899-7278 and we’ll help you confirm. All brand names are the property of their respective owners and are used for compatibility reference only.
Buy Online Pick Up In-Store
Kitchener, Ontario N2E 1W8
- Choosing a selection results in a full page refresh.
