Maradyne® MFA100 - Wire Harness with Adjustable Radiator Temperature Switch and Relay

Maradyne Performance Engine Cooling
Maradyne® - Wire Harness with Adjustable Radiator Temperature Switch and RelayMaradyne® - Wire Harness with Adjustable Radiator Temperature Switch and RelayMaradyne Authorized Dealer
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Universal Fit
Fitment Notes:
  • Not Vehicle Specific
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Product Details

Universal Wire Harness with Adjustable Radiator Temperature Switch and Relay (MFA100) by Maradyne®. This wiring harness kit operates an electric radiator fan depending on engine water temperature. Kit includes heavy gauge wire harness, relay, weatherproof fuse holder, fuse, electrical connectors and adjustable temperature switch. The fan ON temperature is adjustable from 32°F to 240°F, and will go back off when the temperature has dropped approximately 20°F from the ON point.



  • Includes connectors to connect to fan
  • Inline fuseholder and fuse
  • All wires precrimped
  • ON temperature adjustable from 32°F to 240°F
  • Probe installs in radiator core near inlet port

Wiring an electrically-operated fan into your vehicle is simple with the use of Maradyne’s prewired kits. Start by wiring the lead from the fuseholder to the battery directly. This bypasses the vehicle’s electrical system, so you don’t have to decide which fuse has enough extra capacity to power your fans, and then splice into the underhood wiring loom to access that circuit. These harnesses have a connector to mate with the connector on the fan, so all you need to connect next is the thermostat, A/C compressor, or other switch, and a suitable ground connection. The relay-style harness comes supplied with a 30-Amp fuse; this should be replaced with a smaller one rated approximately 25-50% higher than the fan’s current rating. The appropriate fuse rating is included in the fan’s installation instructions.

Brand: Maradyne       Part Number: MFA100
paypal credit Maradyne High Performance Fans

Maradyne® High Performance Fans is a brand name owned by Cleveland OH-based DCM Manufacturing, Inc., a wholly owned subsidiary of Dreison International, Inc., which manufactures and sells air movement and air directional accessories and components serving the High Performance, Off-Road Equipment, Agricultural Machinery, Heavy Duty Truck, Automotive, Bus, RV and Marine and Military markets. Their other brands include SuperTrapp mufflers, Pow-R-Quik starters, Turbo air precleaners, and Air-O-Matic power steering, among others. Family-owned by the Bergers since 1976, the philosophy to produce and distribute a quality product at a fair price backed up with service, is a family tradition that ensures continual growth.

Vehicle FitmentThis part is universal
Year Make Model Fitment Notes
ALL ALL ALL     This part is universal
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