elisahunter1
Insignia AC and Temperature Sensor Issue
Summary of the thread
A 2018 Vauxhall Insignia experienced issues with a defective temperature sensor in the heat exchanger, leading to an error message on the speedometer and a non-functional air conditioning system. The problem was suspected to be linked to a faulty air conditioning control unit. After taking the car to a workshop, it was confirmed that the control unit was indeed the cause of the sensor malfunction, and repairs were carried out.
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4 comment(s)
elisahunter1 (community.author)
Sensor calibration hasn't been checked yet. The temperature gauge appears normal. However, could an incorrect sensor reading truly disable the entire air conditioning system? It seems like an overly sensitive fail-safe.
ClaudiSchnei
That's exactly what happened with my Peugeot. The faulty sensor sent bad data which messed with the ECU. Honestly, if the gauge is otherwise fine, I’d just get it checked at a workshop. Could be a quick fix, or something more serious regarding the cooling system.
elisahunter1 (community.author)
Thanks for the insight. I took it to the workshop. Turns out the air conditioning control unit was indeed the culprit. The defective temperature sensor and repair cost came to 980€ Appreciate the advice!
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VAUXHALL
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INSIGNIA
ClaudiSchnei
Strange. Had a similar issue with my old Peugeot 308, although it was an oxygen sensor. Did you check the sensor calibration? Maybe it's just a software glitch. Is the temperature gauge reading normally otherwise?