12V DC Auto Pressure Switch OEM-Quality Replacement with Automatic Pressure Control for Thermo King Refrigeration Units

The High Quality New Auto Pressure Switch 41-4146 / 41-4147 is a reliable OEM-standard replacement part specially designed for Thermo King transport refrigeration units.

This pressure switch plays a critical role in monitoring and regulating the refrigerant system pressure, ensuring that the compressor operates within a safe pressure range to prevent system overload or failure.

By automatically opening or closing the circuit based on preset pressure thresholds, it provides stable cooling performance, protects critical components, and extends the service life of the entire refrigeration system.

Built from premium-grade metals and high-precision internal components, this switch offers exceptional durability, resistance to vibration, and consistent performance in demanding trucking and trailer environments.

• OEM-Quality Replacement - Fully compatible with Thermo King units and meets or exceeds factory specifications.
• Automatic Pressure Control - Safeguards the refrigeration circuit by controlling compressor operation under high or low pressure conditions.
• Durable Construction - Engineered with corrosion-resistant housing and precision diaphragms for long-lasting service.
• Enhanced Safety - Prevents system damage caused by excessive refrigerant pressure or loss of pressure.
• Quick Installation - Direct-fit design ensures simple replacement with minimal downtime.
• Stable Operation - Maintains consistent system performance in all weather conditions.

The 41-4146 / 41-4147 Auto Pressure Switch is suitable for a wide range of Thermo King truck and trailer refrigeration units, including models commonly used for:

• Refrigerated trucks and vans
• Long-haul trailer refrigeration systems
• Cold storage transport requiring continuous and precise temperature control

These switches are essential for maintaining safe operating pressures in Thermo King cooling circuits, protecting compressors, and ensuring uninterrupted refrigeration during transport.

1. Safety Precautions - Power off the refrigeration unit and disconnect the battery before replacing the pressure switch.
2. Locate the Pressure Port - Identify the high or low pressure port as specified in your unit's service manual.
3. Remove the Old Switch - Use the proper wrench to carefully disconnect the existing pressure switch.
4. Install the New Switch - Thread the 41-4146 or 41-4147 switch into place and tighten securely without over-torquing.
5. Reconnect Wiring - Attach the electrical connector and inspect for any leaks after installation.
6. System Test - Restart the unit and verify that the pressure switch activates correctly under normal operating conditions.

The Thermo King Auto Pressure Switch 41-4146 / 41-4147 is an essential spare part for maintaining safe and efficient refrigerant system operation.

Its rugged construction, automatic pressure regulation, and direct-fit compatibility make it a dependable and cost-effective solution for extending the life of Thermo King refrigeration units in trucking and cold-chain transport applications.