Description

Overview

Thermo King High Pressure Switch protects the refrigeration system by opening on excessive discharge pressure in compatible MD, TS and RD series units. It threads into the high side circuit and sends the control system a cut-out signal, so it helps stop the unit before high discharge pressure causes wider damage.

When this switch fails, the unit can log a high pressure cut-out fault or stop running under load. Because switch style and pressure range matter, match the unit family, thread and lead style before ordering.

Features

• 1/8in NPT male thread
• Opens at 32.43 bar and closes at 25.87 bar
• 300mm lead for remote connection
• Used as an HPCO switch on compatible Thermo King refrigeration units

Specifications and Materials

Thermo King High Pressure Switch suits the HPCO role on compatible truck, direct drive and undermount units. Key details include 1/8in NPT thread, 32.43 bar open point, 25.87 bar reset point and 300mm lead length.

Part number: TK-41-3845-AM.

See the official Thermo King operator manual for a general explanation of HPCO switch function

Compatibility and Fitment

Check the unit series first, then match the switch as a high pressure cut-out rather than a low pressure or fan pressure switch. This part suits Thermo King applications across MD-II, RD-II, TS-500, TS-600, Spectrum TS, V-250, V-280 and selected UT platforms.

This cross-reference listing means this part is a suitable replacement for the part numbers and applications shown. Some changes in installation may be required. 41-3845, 413845, 413-845, 41-1800, 411800, 1088A99G51, 1088A99G38

Compliance and Safety

Recover and handle refrigerant correctly before removing the existing switch, and confirm the system fault is not a genuine head-pressure problem. Also inspect the connector and harness, because a damaged lead can mimic a faulty switch.

Trailer Applications

Thermo King High Pressure Switch fits common service work on TS-500 and TS-600 truck units, Spectrum TS systems and related MD or RD platforms that use an HPCO switch with a flying lead. It is commonly replaced during high pressure fault tracing, harness repair and switch renewal after repeated shutdown alarms.

Cross-reference and Suitability

This part cross-references to or suits the following equivalent part numbers and compatible alternatives:

Why Choose ICS Trailers

ICS Trailers stocks Thermo King electrical and control parts for older refrigeration fleets, so you can order switch, sensor and valve service items together when the job calls for more than one replacement.

Browse Electrical parts at ICS Trailers