valentinameyer1
Mercedes CLA Hybrid AC problem
Summary of the thread
The 2023 Mercedes CLA Hybrid experienced an AC malfunction, with diagnostics indicating an electrical issue, possibly due to undervoltage. Potential causes included a bad pressure sensor or AC relay. Further investigation confirmed that a faulty relay switch was causing the HVAC system to shut down. Replacing the AC relay resolved the problem.
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4 comment(s)
valentinameyer1 (community.author)
Thanks for the response Can you share more about your experience Did you have the same symptoms Do you recall any diagnostic codes or details about the AC relay replacement
leahoffmann1
I wish I had more details Honestly, I just remember being hot and bothered and taking it straight to the shop They said something about the relay switch needing to be replaced It was all very confusing If it's the same for you, I'd say just take it in Better to be safe than sorry
valentinameyer1 (community.author)
I appreciate your input Further diagnostics confirmed undervoltage leading to AC compressor shutdown The issue was a faulty relay switch impacting the HVAC system I replaced the AC relay, and that fixed it The total cost was 240€ Thanks again for your insights
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MERCEDES
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CLA
leahoffmann1
Oh no, that sounds frustrating I have a CLA, and I had a similar problem with my air conditioning I know next to nothing about cars, but I remember the mechanic mentioning something about the AC relay Could that be it Did you check the pressure sensor