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chillyphil · 7th June 2019, 02:57

Hi All,

Many thanks for all the above advice, it's very informative.

The fan cycles on and off on demist and air con calls.

I didn't realise this was an issue so didn't mention it.

I assumed a 3 speed fan because there is no visible resistor, however, I have recently seen a picture comparing 2 and 3 speed fans.
My fan does have the moulding with 2 screw holes at around 2 o'clock where a resistor could fit, the picture I've seen of a 3 speed fan doesn't have these holes.

So it may be a 2 speed with the resistor either missing or mounted elsewhere.

There does not appear to be any sign of coolant loss from the V.

I think that covers all the above questions.

Soooooo.....

I guess that means a couple of things.

I may have a dodgy sensor in the V (although if that was the case, does that mean I would not get an accurate temperature from the ECM?).

I may have a dodgy, or missing resistor, or a dodgy fan?

Should I change the sensor?

And/or

Replace the resistor (assuming I find a 2 speed fan when the bumpers off?)

And/or

Replace the whole fan assembly.

Could I have everyone's views on which of the above, and in which order?

7th June 2019, 02:57	#59
chillyphil Gets stuck in MGZT-T Join Date: Oct 2014 Location: Paignton Posts: 618 Thanks: 278 Thanked 90 Times in 72 Posts	Hi All, Many thanks for all the above advice, it's very informative. The fan cycles on and off on demist and air con calls. I didn't realise this was an issue so didn't mention it. I assumed a 3 speed fan because there is no visible resistor, however, I have recently seen a picture comparing 2 and 3 speed fans. My fan does have the moulding with 2 screw holes at around 2 o'clock where a resistor could fit, the picture I've seen of a 3 speed fan doesn't have these holes. So it may be a 2 speed with the resistor either missing or mounted elsewhere. There does not appear to be any sign of coolant loss from the V. I think that covers all the above questions. Soooooo..... I guess that means a couple of things. I may have a dodgy sensor in the V (although if that was the case, does that mean I would not get an accurate temperature from the ECM?). I may have a dodgy, or missing resistor, or a dodgy fan? Should I change the sensor? And/or Replace the resistor (assuming I find a 2 speed fan when the bumpers off?) And/or Replace the whole fan assembly. Could I have everyone's views on which of the above, and in which order?