Mazda MPV fan

zak1998, Nov 19, 10:49pm
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 19, 11:12pm
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 19, 11:12pm
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 19, 11:18pm
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 19, 11:24pm
radiator fan often run constant if the aircon is on. otherwiseonly when reaching above running themperature stops when it coooled below.

zak1998, Nov 19, 11:59pm
It's a 2005 model

zak1998, Nov 19, 11:59pm
It's a 2005 model it runs even when the engine is off with key set just before you start it

mugenb20b, Nov 20, 1:09am
Is the A/C on!

zak1998, Nov 20, 2:56am
no everthing is off fan still goes and the engine is cold

blue35, Nov 20, 3:39am
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, 3:50am
Yes Only just got the car