Porsche 944 Turbo Thermo Fan Switch

The whole job of it is to essentially go off of the cooling temperature.

Porsche 944 turbo thermo fan switch.

You can check this with a test light to check power. When the ignition is turned on the cooling fan relay is energized closing a contact to short out the slow speed resistor. Diagram ref no 5. If you do and the fans do not cycle replace the switch.

At that point it should cool down. At a specific temperature let s say a low temp switch at say 75 the circuit completes and it allows the fans to kick on. If the cooling fan does not operate when the car heats the thermo switch is bad. On the normally aspirated porsche 944s the switch is relatively simple to change out but on the turbo there is a fair amount of work to get to it.

2 pole switch not suitable for 944 turbo or 944 s2 3 0l or 968 the switching temperatures for this switch are 87 c 92 c prone to failing with age these fan switches located in the main cooling radiator control the switching on and off of the cooling fans after the. Porsche 944 1985 91 turbo and cars with air con porsche 968 1992 95 click zoom in for large parts diagram. For an early model 944 cooling fan circuit diagram no ac click here. Definitely sounds to me like a faulty thermo fan switch.

Thermofan switch closed the cooling fan will run in fast speed. Hi there i think that the first paragraph of this article may be somewhat incorrect for a 944 turbo. Porsche 944 924s thermos fan switch replacement duration. General fitment 924 1986 88 944 1985 88 944 1982 85.

Timothy schrock 457 views. The thermoswitch that regulates the radiator fans is mounted on the. Porsche 924 turbo 5 cylinder turbo restomod duration. If the high temperature condition still exists i e.

3 pin general for cars with aircon option m573 or or fits. As far as i can tell this switch has nothing to do with the cooling radiator fan operation. The auxiliary fan switch is located on the left side of the radiator near the top of the radiator and just below the coolant hose.