Thermador Built-In Wine Cooler Sealed System Leak Repair
Customer Complaint / Symptoms
- •Customer reported wine cooler temperature rising above set point
- •Unit running constantly but not maintaining proper wine storage temperature
- •Temperature display showing 55 degrees F instead of the set 45 degrees F
- •Compressor running non-stop without reaching target temperature
🔍 Diagnosis / Cause Found
During diagnostic inspection, technician found a refrigerant leak in the sealed system copper tubing. Leak detection confirmed with leak detector solution — visible bubbling at the leak point in the copper line near the compressor. The unit had lost most of its R-134a charge, causing the compressor to run continuously without achieving proper cooling. This is a common failure point in Thermador built-in wine coolers installed in warm, humid Houston-area environments.
📸 Repair Photos
Thermador T18IW900SP wine cooler — unit in customer kitchen before repair
Refrigerant leak detected at copper tubing — visible bubbling with leak detection solution
Technician tools and manifold gauges during sealed system recharge
Wine cooler reassembled and operational after sealed system repair
🔧 Repair Performed
Technician opened the sealed system and located the exact leak point in the copper tubing. The leak was brazed and sealed using silver solder. A service valve was welded onto the compressor for future service access. The entire sealed system was then pressure-tested with nitrogen at 150 PSI and held for 30 minutes to confirm no remaining leaks. After passing the pressure test, the system was evacuated with a vacuum pump down to 500 microns to remove all moisture and non-condensables. The system was then recharged by weight with the exact factory-specified amount of R-134a refrigerant per the unit nameplate. Full operation test confirmed proper cooling and temperature stability.
🛒 Parts Replaced
- ✓Sealed system copper tubing repair (brazed)
- ✓Service valve (installed on compressor)
- ✓Filter drier
- ✓R-134a refrigerant (factory-specified charge weight)
✅ Result
Wine cooler restored to proper operating temperature within 3 hours of recharge. Unit maintaining stable 45 degrees F as set. Customer confirmed all wine bottles properly chilled.
Need Thermador Refrigerator Repair?
We serve The Woodlands and all surrounding Houston areas.