Vandaag de zilveren bolide weer eens (voor de grap) uitgelezen, de enige foutcode blijft CEM-B10EA14.
Ik vond op een
Engelstalig forum onderstaande teksten, wellicht helpt het iemand:
Probleembeschrijving:
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When starting up, everything works as expected. The blowers push out hot air and the cabin gets up to temp (set at 21-23) in about 10 mins. All as expected.
When the cabin temp is reached, the vents on top of the dash start to pump out cold air (was hot). It appears that the cabin temp then reduces as it definately becomes colder. I can manually reduce the flow of cold air by turning the fan speed down to minimum and manually directing the air, but I still get a cold draft from the dash top vents enough to make it uncomfortabe.
I've run a VIDA diagnostic (I'm no expert in VIDA by the way!!) with the following result (see attachement): -
CEM-B10EA14 - Positive Temperature Coefficient heater - General Electrical Failures - short circuit to open or ground
I know my car has the PTC heater fitted (as confirmed by VIDA), but I thought this was used to supplement the car heating from cold, as it's effectively a high kW heating element. Therefore I can't understand why I'm getting the issue I am. I would have though that if the PTC heater is faulty I would get slow initial heating follwed by normal heating once the conventional system is up to temperature but this is not the case. Once my cabin is up to the set temp., then it starts to blow cold.
This PTC element is buried in the dash (item 29 on attached pic), but I don't know if the error code relates to this or the CEM itself. VIDA gives no instruction on replacing the PTC element either.
I've seen this issue on a couple of older threads on other forums, but not with any resolution.
I have the option to recalibrate the CC, but VIDA doesnt show this as being an issue.
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Well it seems like I've sorted this issue, so would like to close it off and document for those who may have a similar problem down the line.
I went through the summer without fixing it as a lack of heating wasn't an issue! Lived with it until Christmas, but then it seemed to get worse. Freezing cold air delivered from dashtop and windscreen vents only tempered by switching to 23 degree manual heat from dash vents.
As the cabin temperature sensor in the centre console is an easy change, I decided to do this first. Not sure it was the problem, but a 2nd hand part from eBay was only £10, so nothing to lose (FoMoCo part 6G9N-19C734-AB used on lots of Volvos, Fords and Land Rovers).
I had a small rattle/buzzing from the bottom of the centre console, so decided to fix this at the same time.
When changing the temp sensor, I noticed the original part had a rattle when shaken, which was not there on the replacement. Could this be my mystery noise?
Anyway, temp sensor changed and reassembled and the rattle has gone. Test of the CC and all is working as expected. CC now set at a sensible self-regulating 20 and very comfortable.
Original fault code also disapeared from VIDA: - CEM-B10EA14 - Positive Temperature Coefficient heater - General Electrical
Fantastic result!! Thanks to all that helped.
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