Hey All! Bought a 95 Accord. Beautiful one-owner. Drove it home a little over a week ago. As soon as I turned the engine off, the fan started running and did for about 10 minutes. Is this normal? Should I do a flush and get a new thermostat?

Thanks in advance!

 

The passenger side fan will turn on when the car is turned off for a maximum of about 10 minutes if the coolant is over 223 degrees F.

The coolant could be over 223F, so you can flush the system and refill with new coolant. I'd also inspect the fins on the radiator. Dirt/debris can block air flow. You can have corroded/damaged fins. If you opt to change the thermostat, purchase one from the Honda dealership.

The other item is that radiator fan switch b is constantly shorted, so the vehicle's electronics thinks the coolant is over 223F and turns on the fans. You can use a volt meter on temp switch B (near where the upper radiator hose connects to the engine. The switch should read open (infinite resistance) when the engine is cold. Closed or ~zero resistance when the coolant gets hot.

 

Thanks PAhonda!