Calorstat TS2601 Engine Cooling Fan Switch

Overview

Calorstat TS2601 is an engine cooling fan switch for radiator-mounted applications. It uses a 95/90 temperature setting and an M14x1.5 thread size, making it a fitment-focused replacement for older Volvo and BMW cooling systems.

Compatible With Volvo 240, 740, 760, 780, 940, and 245/244 applications, plus select BMW 2800, 3.0CS, 320i, 528e, and 733i models. The TS2601 part number is also referenced in cross applications under several interchange numbers.

Key Features

• Engine cooling fan switch with a single-speed operating circuit.
• 95/90 temperature activation range for radiator fan control.
• M14x1.5 thread size for threaded radiator installation.
• Fits radiator-mounted cooling switch applications across Volvo and BMW platforms.
• TS2601 part number for catalog and service matching.

Detailed Description

The Calorstat TS2601 is built for vehicles that use a threaded radiator fan switch to trigger cooling fan operation at a defined temperature. With a 95/90 switch point and one-speed design, it serves as a direct replacement style component for systems that rely on simple on/off fan control. This part number, TS2601, appears in fitment for Volvo 240, 740, 760, 780, 940, 242, 244, 245, and 745 models, along with BMW 2800, 2800CS, 3.0S, 3.0CS, 3.0CSi, 3.0Si, 318i, 320i, 524td, 528e, 528i, 530i, 533i, 535i, 633CSi, 635CSi, and 733i applications.

This part cross-references Hayden 5064 for the same application.

What It Is Used For

• Cooling fan not switching on at the correct temperature.
• Fan cycling issues caused by a worn radiator temperature switch.
• Restoring radiator-based fan control on older cooling systems.
• Replacing a failed threaded fan switch with the correct thread size.

Installation Notes and Tips

Install in radiator-mounted threaded switch locations only where the vehicle uses an M14x1.5 fan switch. Verify the temperature specification and connector style against the original part before installation. The fitment notes indicate radiator location for Volvo applications and OE-supplier-related fitment notes for several BMW models.

Quality Assurance

Calorstat TS2601 is cataloged for direct fitment matching across the listed applications and is supported by interchange references for service lookup. The TS2601 part number is useful when matching replacement cooling fan switches for older Volvo and BMW vehicles.