As per the title - my radiator cooling fans dont work as they should and I cant figure out why. Generally speaking whenever the AC is off, the fans dont spin at all, and I have see the temperatures rise and rise. It has on an occasion led to damage - new Gearbox oil cooler, and even caused a blown head gasket due to overheating. I used VCDS - No codes related to anything about cooling or fans etc
I used OBDEleven and noticed temps hitting 100 and still the fans were not spinning more than 10% speed. The screenshots are attached.
AC Off and at 96'C only one fan runs fairly slow
AC Off and at 99'C only one fan runs fairly slow also, I know from experience it will only climb up to 100+ and the fans wont kick in
A/C On - both fans run at medium speed - provided some cooling and temps started lowering...
The weird thing is, despite the fan activation above, When the A/C is switched off, only one fan spins and that too at slow speed. However when the AC is on, they spin at around 40-50% speed.
I then ran an output test on the fans, and they ramped up to 100% speed - this was a surprise to me as I have never seen them work so fast.
So I am now confused as I thought the issue was with my Cooling fan control modules, but in the output test they worked... Could it be something else?
(For reference the Thermostat and water pump were switched out for brand new 6 months ago)
can anyone advise?
I used OBDEleven and noticed temps hitting 100 and still the fans were not spinning more than 10% speed. The screenshots are attached.
AC Off and at 96'C only one fan runs fairly slow
AC Off and at 99'C only one fan runs fairly slow also, I know from experience it will only climb up to 100+ and the fans wont kick in
A/C On - both fans run at medium speed - provided some cooling and temps started lowering...
The weird thing is, despite the fan activation above, When the A/C is switched off, only one fan spins and that too at slow speed. However when the AC is on, they spin at around 40-50% speed.
I then ran an output test on the fans, and they ramped up to 100% speed - this was a surprise to me as I have never seen them work so fast.
So I am now confused as I thought the issue was with my Cooling fan control modules, but in the output test they worked... Could it be something else?
(For reference the Thermostat and water pump were switched out for brand new 6 months ago)
can anyone advise?