Speedmaster PCE184.1004 200/185 Degrees 3/8" NPT Thermostatic Fan Control Sending Unit

The Speedmaster PCE184.1004 is a thermostatic fan control sending unit designed to regulate engine cooling fans based on coolant temperature. This 3/8" NPT-threaded switch activates at 200 degrees and deactivates at 185 degrees, making it ideal for automotive and hot rod cooling systems where precise fan engagement is critical. The temperature differential ensures the fan doesn't cycle excessively while maintaining engine operating temperature within the optimal range.

This sending unit mounts directly into the engine block or radiator via its 3/8" NPT male connection, providing a compact, straightforward control solution for mechanical and custom cooling setups. The dual-temperature design (on at 200°F, off at 185°F) delivers reliable fan engagement without the need for complex wiring or electronic modules. Commonly used in street rods, classic car restorations, and performance engines, the PCE184.1004 offers dependable thermostatic control for maintaining consistent coolant temperature during driving conditions.

Key Features & Benefits

• Dual-Temperature Rating: Activates at 200 degrees and deactivates at 185 degrees for automatic fan control without cycling.
• 3/8" NPT Connection: Direct thread-in mount to engine block or radiator for secure, leak-free installation.
• Thermostatic Design: Responds to coolant temperature changes to engage or disengage the fan automatically.
• Compact Sending Unit: Minimal profile fits into tight engine compartments on custom and classic builds.

Specifications

Ideal Applications

• Custom hot rod and street rod cooling systems
• Classic and vintage car engine temperature control
• Performance engine coolant management
• Aftermarket radiator and fan setups