Hi,

I recently upgraded my MK4 Fabia SE L to a MK4 75 plate Monte Carlo. I've got an upcomming appointment at the dealership due to a loud ratlling noise coming from the passenger side a-pillar (potentially could be a common fault according to some Fabia Facebook groups). Anyway, over the last few days I've noticed that the dashboard has been becoming rather hot whilst driving - so much so that its giving off a warm plastic smell. At first I didn't understand why, as the air-con unit was switched off. However, after some messing around with the settings on the AC unit, I noticed that if I set the AC to lets say a warm/hot temperature and then turned it off with the off button, warm/hot air would still come out of the blowers (either the windscreen, or front blowers depending on the setting chosen) whilst driving - albeit with not much "power" from the blowers themselves. If I turned the AC unit back on, but then lowered the temp to less than 18 degrees/cooler temperature and turned if off again, the issue wouldn't happen and no air would come out from the blowers even when driving. I've never come across this before, so I'm guessing it is some kind of fault. I'll bring it up with the dealership next week, but just wondering if anyone else has had the same issue before?

Cheers,

Edited 14 October, 202514 Oct by JA1991

Do you let the cabin / car interior get to the temperature you are requesting.

As in giving the heating / climate control, AC on or off the time to get to the requested temperature.

Yeah, I let it get to temperature before I turn it off. But it's like the heating element stays active even though the AC is switched completely off. Another example is if I leave it on say 21 degrees, turn the AC off, then come to use the car the next day (but don't turn the AC on), the dashboard will still warm up and warm air would still come out of the blowers but without the fan element? If that makes sense?

It makes most sense when there is given what the outside / ambient temp is, and what the cars interior temp is.

Then that gives an idea about what cooling or heating is being requested.

But surely if it's switched off, nothing should be coming out of the vents?

@JA1991 Are you turning off the blower totally.

Are you closing the vents to incoming air from outside.

Is everything off, everything closed?

I would think that turning the temperature up in an ice car allows coolant flow from the engine into the heater element if you turn it to cold it physically shuts it off, coolant just runs round the engine.

So if you set it on then turn the fan off heat will radiate anyway. When set to cold it's shut off so airflow would be ambient and less noticeable.