Air con only blowing red hot air

Mar 17, 2020 | 04:05 PM

quattrogmbh

Thread Starter

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Joined: Oct 2009

Posts: 85

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various

Air con only blowing red hot air

Anyone had an issue where the air con blows red hot no matter what the climate control temperature is set to?

Mar 17, 2020 | 06:02 PM

Wiggis

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Joined: May 2016

Posts: 130

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From: Oxford, UK

GLC63S, A35 AMG

Yes. It's a relatively common fault. It's the overhead control panel (the unit with the light switches on it). If you give it a gentle tap with the palm of the hand, it should start working again - however, Mercedes will need to replace the unit. The good news is that it's a 10 minute job. The bad news is that the part was (not sure if it still is) on back order ......

Jun 24, 2020 | 09:57 AM

user 75435784

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Joined: Jun 2020

Posts: 14

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GLE300d

I’m glad I’m not going crazy. Just had this happen over the last few days. I’ll try the palm tap on the roof controls and see how I go.

How hard should I tap?