Auto Pressure Switch 41-4146 / 41-4147 – Replacement for Thermo
King Refrigeration Units
Product Overview
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.
Key Features & Benefits
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.
Applications
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.
Installation Tips
Safety Precautions – Power off the refrigeration unit and disconnect the battery
before replacing the pressure switch.
Locate the Pressure Port – Identify the high or low pressure port as specified in your
unit’s service manual.
Remove the Old Switch – Use the proper wrench to carefully disconnect the existing
pressure switch.
Install the New Switch – Thread the 41-4146 or 41-4147 switch into place and tighten
securely without over-torquing.
Reconnect Wiring – Attach the electrical connector and inspect for any leaks after
installation.
System Test – Restart the unit and verify that the pressure switch activates
correctly under normal operating conditions.
Technical Specifications
| Specification | Details |
|---|
| Product Name | Auto Pressure Switch |
| Part Numbers | 41-4146 / 41-4147 |
| Function | Regulates refrigerant system pressure and controls compressor |
| Operating Voltage | 12 V DC (typical Thermo King configuration) |
| Material | Corrosion-resistant metal housing with precision diaphragm |
| Compatibility | Thermo King refrigeration truck and trailer units |
| Condition | 100% Brand New, OEM-standard replacement |
| Packaging | Secure export-grade packaging for safe shipping |
Summary
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.
FAQ
Q1:When will you arrange the delivery?
A:Generally 1-2 weeks after the payment, and we will continually
inform customer the goods carriage status, until you receive the
goods.
Q2. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery.
Q3:Can we get the some technological training?
Our company provide the complete technological training, including:
installation, use and maintenance.
Q4:How long is your products warranty?
A:The products of our lifetime for you to provide maintenance, one
year warranty,Courier fees to pay half, after a year of maintenance
fees shall be borne by the buyers.
Q5: How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our
customers benefit ; 2. We respect every customer as our friend and
we sincerely do business and make friends with them, no matter
where they come from.
