Four Seasons 37838 Engine Cooling Fan Temperature Switch

Reliable Engine Cooling Fan Temperature Switch for BMW Models

The Four Seasons Temperature Switch part number 37838 is designed to maintain optimal engine temperature by controlling the cooling fan operation. Specifically engineered for BMW 318i, 318ti, and Z3 models, this radiator-mounted temperature switch ensures precise fan activation at the correct temperature thresholds.

Key Features of Four Seasons Temperature Switch 37838

• Compatible with BMW 318i, 318ti, and Z3 models
• Engine cooling fan temperature switch with a rectangular male connector
• Three-terminal design for reliable electrical connection
• Male fitting with M14 x 1.50 thread size for secure radiator mounting
• Fan activation temperature range between 176°F and 190°F
• Designed to open the fan circuit at specified temperature
• Meets or exceeds OEM specifications for performance and durability

Detailed Description of the Four Seasons Temperature Switch

This engine cooling fan temperature switch from Four Seasons is part of the Temperature Switch product line, which focuses on precise temperature control components for vehicle cooling systems. The switch features a rectangular male connector with three terminals, ensuring a stable and secure electrical connection. It mounts directly to the radiator using a male fitting with an M14 x 1.50 thread, providing a reliable and leak-free installation point. The switch operates by opening the fan circuit when the engine coolant temperature reaches between 176°F and 190°F, helping to regulate engine temperature and prevent overheating.

Common Applications and Issues Addressed

• Prevents engine overheating by activating the cooling fan at the correct temperature
• Ensures proper fan operation in BMW 318i, 318ti, and Z3 cooling systems
• Replaces faulty or worn temperature switches causing inconsistent fan behavior
• Helps maintain optimal engine performance and fuel efficiency
• Addresses radiator fan circuit failures related to temperature sensing

Installation Notes and Tips

When installing the Four Seasons Temperature Switch 37838, ensure the radiator is cool and depressurized before removal of the old switch. The M14 x 1.50 threaded fitting requires proper torque to avoid leaks but avoid overtightening. Confirm the rectangular male connector with three terminals matches the vehicle wiring harness for a secure electrical connection. This switch mounts directly to the radiator, so verify the mounting location and orientation for proper function.

Quality Assurance and Warranty

Four Seasons Temperature Switch 37838 meets or exceeds OEM standards, ensuring reliable performance and durability. The product is manufactured to strict quality controls to provide consistent operation in demanding engine cooling environments. Warranty coverage details should be confirmed with the supplier or manufacturer.