Heating air conditioning in the Peugeot 207 Diesel - experiences and solutions

I once had a similar problem with my 2012 petrol Peugeot 208. In summer, the A/C went crazy and switched to heating instead of cooling. The cause was not the engine fan speed sensor, but the control unit - it was completely defective. It was a serious problem, but fortunately it was easy to fix. All in all, not a horror trip to the mechanic, more of a routine job. I had the control unit replaced and everything has been running like clockwork ever since. So, no need to panic, sometimes it's not the obvious things. Good luck, buddy!

(Translated from German)

Hey, thanks for the quick reply! Okay, that sounds more or less bearable, at least not a total disaster. Do you remember how much you paid to replace the control unit? And has there been any follow-up since then or is everything still running smoothly? It would be great to hear a bit more about it!

(Translated from German)

Hello again! Yes, you can believe it, the repair of the control unit cost a grand. It was a lot of money, but everything has been running perfectly since then. And no, there hasn't been any replay since. As you suspected, the engine fan speed sensor was also out of order. But after a visit to the mechanic, that was also fixed. Now I'm happy with my rolling sauna again! So, don't worry, I'm sure everything will be fine again!

(Translated from German)

Wow, thanks for all the info. A thousand sounds a bit harsh at first, but if the car runs again afterwards, that's okay. I think I'll start my own trip to the mechanic tomorrow. Your story gives me hope that there's nothing worse in store for me. I'll go to the mechanic of my choice and see if the control unit or the speed sensor is also faulty. Good to know that at least one of these solutions could be the key to fixing the problem. Thanks mate, that really helps!

(Translated from German)