Description

Overview

Carrier Thermostat 82°C 43.8mm is an engine coolant thermostat for compatible Carrier transport refrigeration setups using the CT 4.134 (D2203) engine platform. It regulates coolant flow as the engine warms, helping the system reach operating temperature correctly and maintain stable running temperature. If the thermostat sticks open or closed, warm-up and cooling performance can both suffer, so matching the correct replacement is important.

Features

• 82°C opening temperature
• 43.8mm diameter for fitment matching
• Suits CT 4.134 (D2203) engine applications
• Used on common Carrier Supra and Vector systems

Specifications and Materials

Part number: CA-25-37559-01-AM.

Component type: engine coolant thermostat.

Opening temperature: 82°C.

Diameter: 43.8mm.

Engine coverage: CT 4.134 (D2203).

See the MAHLE thermostat technical guide for general thermostat operating principles and service guidance.

Compatibility and Fitment

Match the thermostat diameter and temperature rating before ordering, as similar CT engine variants can use different housings. Inspect the housing sealing face and bleed points during replacement to avoid air locks and unstable temperature control.

Cross-reference numbers: 25-37559-01, 253755901, 25-15003-03, 251500303, 25-37558-00, 253755800, CA-25-37558-00-AM, CA253755800AM.

Compliance and Safety

Let the cooling system cool before opening the circuit, as hot coolant and pressure can cause injury. Replace coolant as required, fit a new gasket if used by the housing, and check for leaks after warm-up.

Trailer Applications

This thermostat suits transport refrigeration applications using CT 4.134 (D2203) engines in Carrier Supra and Vector systems where the 82°C rating and 43.8mm diameter match the installed part. Confirm the engine identification and thermostat seating diameter before ordering, especially on units with previous repairs.

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 gives you clear cross-reference and fitment detail for transport refrigeration parts, making it easier to match the right cooling-system component. Browse Carrier parts at ICS Trailers for more transport refrigeration spares.