The Derale 16749 is an adjustable electric fan control kit that lets you set the fan turn-on temperature anywhere from 150°F to 240°F, with turn-off preset 10 degrees below the turn-on point. It controls up to two fans at a combined maximum draw of 25 amps through a heavy-duty 40/60 amp relay. It uses a 3/8" NPT thread-in probe that threads into a water jacket port for direct coolant sensing, and it includes an A/C override circuit.
Specifications:
- Type: adjustable electric fan controller
- Turn-on range: adjustable 150°F to 240°F (turn-off 10°F below turn-on)
- Amp rating: up to 25 A, controls up to 2 fans
- Relay: heavy-duty 40/60 amp relay harness
- Probe: 3/8" NPT thread-in water jacket probe (replacement sensor 16750)
- Included: thread-in probe, relay wire harness, connectors, A/C override
- Note: not compatible with Dodge Viper, Ford Taurus, Ford Contour, or Lincoln Mark VIII OE 2-speed fans
- Part number: 16749
FAQ
What does the Derale 16749 controller do?
It turns up to two cooling fans on and off at a temperature you set between 150°F and 240°F.
What type of probe does it use?
It uses a 3/8" NPT thread-in probe that threads into a water jacket port.
How many fans and how much current can it handle?
It controls up to two fans at a combined 25 amps through a 40/60 amp relay.
Does it include an A/C override?
Yes, an A/C override circuit is included.

