Seat Leon Hybrid Solar Sensor Issue

That's interesting. A faulty HVAC sensor could definitely cause the heating issues you're experiencing, especially on a hybrid. Have you checked the sensor's wiring for any obvious damage or corrosion? Where is the solar sensor located in the Leon? Is it on the dashboard?

Thanks for the quick reply! I haven't checked the wiring myself because I wasn't sure where to start looking, and honestly, I'm not that confident poking around with the electrics. You mentioned the location of the solar sensor. Exactly where on the dashboard should I be looking? Any tips on how to visually inspect the wiring without causing more problems?

Okay, if the error code specifically points to the solar sensor and you're experiencing low heating, it's very likely the root cause. Given your lack of experience with electrics, and considering the repair cost of 95€, my advice is to take it to a workshop. They'll have the necessary tools and expertise to properly diagnose and repair the connection or replace the solar sensor if needed.

I took the Leon to the workshop. It was indeed a faulty connection to the solar sensor, just like the error code suggested. They cleaned the contacts and secured the plug. Everything works perfectly now, and the heating is blasting hot air again. The whole thing cost me 95€, including the error diagnostics and repair. Thanks again for your help!