Description

Overview

Run Stop Speed Control Solenoid 12V Thermo King controls run-stop and speed-change movement on older trailer refrigeration units that use a plunger-style actuator. When the original solenoid becomes weak or sticky, the linkage may stop moving cleanly, so the unit can struggle to change operating mode as intended. Because this part works through the external control linkage, accurate pull and return movement matter during normal operation. Therefore, replacing a worn solenoid can help restore more reliable speed control and run-stop response.

Features

• 12V run-stop speed control solenoid for Thermo King trailer units
• Suits T-Series, SB-III, TS and SB applications
• Also described as a damper solenoid or run-stop speed control solenoid
• Helps replace a worn or sticking actuator that no longer pulls the linkage cleanly

Specifications and Materials

Run Stop Speed Control Solenoid 12V Thermo King is a 12V replacement electrical actuator for units that rely on an external plunger to change operating state. It suits Thermo King T-Series, SB-III, TS and SB applications, so correct mounting position, linkage travel and wiring polarity all matter during installation. In other words, this is not just a generic solenoid. Instead, it is a control component that needs to match the existing bracket and movement range properly. Part number: TK-44-2823-AM.

See the Thermo King operator manual for start-stop and high speed control guidance

Compatibility and Fitment

First, match the unit family, voltage, mounting style and plunger travel before ordering. It suits Thermo King T-Series, SB-III, TS and SB applications where the run-stop or speed-control linkage is driven by an external solenoid. However, linkage condition also matters, because a bent bracket or worn pivot can make a good solenoid look faulty. 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. 44-2823, 442823, 442-823, 44-1538, 441538, 44-1360, 441360, 44-3736, 443736, 44-1208, 441208, 44-499, 44499, 44-9595, 449595, 44-5768, 445768, 44-2821, 442821, 44-1143, 441143, 44-6325, 446325, 44-1201, 441201, 44-175, 44175, 44-1292, 441292, 44-1364, 441364, 44-6762, 446762, 44-1195, 441195, 44-5178, 445178

Compliance and Safety

Before fitting the solenoid, isolate the battery supply. Then check the linkage by hand before powering the unit again. If the bracket is bent, the pivot is sticky or the adjustment is too tight, the plunger can overload and fail early. For that reason, set the linkage squarely and confirm clean pull-in and return before putting the unit back into service.

Trailer Applications

Run Stop Speed Control Solenoid 12V Thermo King suits older trailer refrigeration units where engine mode or speed is changed through an external actuator rather than an internal motorised control. It is a practical workshop replacement when the original solenoid sticks, chatters, weakens or fails to move the linkage through full travel. As a result, it suits repairs where the control system still works, but the actuator itself no longer responds properly.

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 service parts for electrical and control repairs, so you can source replacement items for older unit systems more easily. Browse Thermo King parts at ICS Trailers for more transport refrigeration replacements.