Mugwump
New Member
Hi all
I'm not sure if this really belongs in Servicing, Interior or whatever.
Feel free to lambast me if I've put it in the wrong place.
On my W245, the air conditioning seems to pick hot days to blow hot, cold days to blow cold etc.
If I set the temp to min, it always blows cold, and if I turn it right up, it will blow hot.
But if I set it to a specific temperature, it doesn't seem to want to hold that, it just has a mind of its own.
It's as if it's not getting a valid temperature reading from the cabin air temperature sensor.
Anybody know where the cabin air temp sensor is located, and how easy it is to change?
I've had an hour or so on WIS/ASTA and found it mentioned at N22/7b1 but not much to suggest where this is, or what to do about it.
The sensor is NOT in the dome light assembly.
There is a small grill next to the temperature control knob, I suspect it may be behind that.
But looking at the pics of the control knob assembly on ebay, I don't see it as a changeable unit.
That said, before I try disassembling anything I'd like to try an AC reset, but the videos on the subject refer to buttons that aren't on my unit.
I only have AC, Recirc and Rear Demist buttons, while the videos all say hold Defrost and Recirc.
AC and Recirc together for a while start the flaps moving (I can hear them), but the LEDs don't flash to indicate reset.
Any ideas?
I'm not sure if this really belongs in Servicing, Interior or whatever.
Feel free to lambast me if I've put it in the wrong place.
On my W245, the air conditioning seems to pick hot days to blow hot, cold days to blow cold etc.
If I set the temp to min, it always blows cold, and if I turn it right up, it will blow hot.
But if I set it to a specific temperature, it doesn't seem to want to hold that, it just has a mind of its own.
It's as if it's not getting a valid temperature reading from the cabin air temperature sensor.
Anybody know where the cabin air temp sensor is located, and how easy it is to change?
I've had an hour or so on WIS/ASTA and found it mentioned at N22/7b1 but not much to suggest where this is, or what to do about it.
The sensor is NOT in the dome light assembly.
There is a small grill next to the temperature control knob, I suspect it may be behind that.
But looking at the pics of the control knob assembly on ebay, I don't see it as a changeable unit.
That said, before I try disassembling anything I'd like to try an AC reset, but the videos on the subject refer to buttons that aren't on my unit.
I only have AC, Recirc and Rear Demist buttons, while the videos all say hold Defrost and Recirc.
AC and Recirc together for a while start the flaps moving (I can hear them), but the LEDs don't flash to indicate reset.
Any ideas?