Heater not turning Off
11-07-2023, 04:55 AM
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w212
Heater not turning Off
Hi Guys thanks for the ad. i have 2009 e220 the heater motor won't turn off even with the key out of the ignition, i have replaced the resistor but still won't turn off any ideas TIA
11-07-2023, 02:28 PM
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2017 GLE350 4MATIC
Welcome! Please post a photo of the E-Class.
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CaliBenzDriver (11-08-2023)
11-08-2023, 12:01 PM
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MY'14 W212 M276 3.5NA @60kMi
sensor glitches
You can/should read data with a scanner or simply go ahead and take 5mn chance to solder it for free - You be the judge where you take shortcuts. Solderless HVAC AAC Module can comand stupid actions too - Scanner let's you make better educated guess so it pays for itself.
If your troubleshooting does not restore functionality, this is a LIN module... it is directly sensitive to voltage glitches - Then you can direct your attention to cleaning the painted GND Posts located at front L+R footwells. Of course youll need to power down the vehicle which will effectively also reboot all its sleepless modules that have soft-crashed after prolonged service.
I recommend you ensure your main battery condition is in good repair.
FLOAT it with a CTEK using regular NON -AGM Setting to preserve your car electronics from seeing unusual higher voltage (RTFM: Read the CTEK manual).
Enjoy
Last edited by CaliBenzDriver; 11-08-2023 at 06:30 PM.
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pierrejoliat (11-10-2023)
