When reliable cooling system management is essential, the Maradyne MFA109 Temperature Switch delivers automatic fan operation designed for fuel-injected engines. Engineered to activate at 195°F and deactivate at 175°F, this temperature switch helps maintain optimal engine temperatures while ensuring your electric fan operates only when needed.

Built for dependable performance, the MFA109 automatically engages the cooling fan as temperatures rise and shuts it off once sufficient cooling has been achieved. This helps reduce electrical demand, minimize fan wear, and support efficient engine operation in a wide range of driving conditions.

Whether you're upgrading a performance vehicle, maintaining a daily driver, or completing a custom cooling system installation, the MFA109 provides the dependable temperature control trusted by enthusiasts and professionals alike.

Accuracy. Reliability. Cooling Control.

Key Features

For fuel-injected engines
3/8" NPT thread size
Activates cooling fan at 195°F
Deactivates cooling fan at 175°F
Helps maintain consistent engine operating temperatures
Ideal for automatic electric fan control systems
Direct replacement for Maradyne MFA103
Reliable thermal switching for street, performance, and custom applications

CA Prop 65

Maradyne MFA109 Specifications

KEY SPECS
MFG. Part #	MFA109
Brand	Maradyne
Temp. Range	195°F on / 175°F off
Thread Pitch	3/8 in NPT
Material Type	Brass

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