Mazda MPV fan

zak1998, Nov 20, 3:49pm
Can anyone help does the radiator fan run all the time or should it shut off and on. Only it's a new car and my Honda before use to come on and off.

saxman99, Nov 20, 4:12pm
I'm *pretty* sure it should only come on when engine is hot. And then switch in and out as necessary. Your thermo switch might be faulty.

blue35, Nov 20, 4:12pm
It should come on and off as required by the engine temp. Is the air con on! If it is, this can activate the radiator fans.

cpnnz, Nov 20, 4:18pm
2002-on model! most likely needs a fan control unit. small ecu that is mounted behind the radiator on the fan shroud near the battery. I have changed a couple of these which had the cooling fan coming on very early from cold, and not shutting off.

intrade, Nov 20, 4:24pm
radiator fan often run constant if the aircon is on. otherwiseonly when reaching above running themperature stops when it coooled below.

zak1998, Nov 20, 4:59pm
It's a 2005 model

zak1998, Nov 20, 4:59pm
It's a 2005 model it runs even when the engine is off with key set just before you start it

mugenb20b, Nov 20, 6:09pm
Is the A/C on!

zak1998, Nov 20, 7:56pm
no everthing is off fan still goes and the engine is cold

blue35, Nov 20, 8:39pm
Either a faulty sensor etc, or someone has hard wired it to always operate, for whatever reason ( they knew it was faulty or it is overheating), get it checked out professionally.

zak1998, Nov 20, 8:50pm
Yes Only just got the car