Urgent Help Needed: Audi A3 (2015) AC and Seat Heating Malfunction

It sounds like your Audi A3 is experiencing an issue that could be electrical or related to the climate control system. Since both the air conditioning and seat heating are affected, the problem might stem from a shared fuse, a faulty control module, or wiring issues. Start by checking the fuse box for blown fuses related to the climate control and seat heating systems. If the fuses are intact, test the air conditioning system for refrigerant levels and compressor function. For the seat heating, verify the seat heater switch and wiring. If no visible issues are found, a diagnostic scan can reveal any fault codes in the climate control system. Visiting a specialist may be necessary for further troubleshooting or repairs.

For the air conditioning issue, start by checking the refrigerant levels. If the refrigerant is low, the air conditioning system won't be able to produce cold air. As for the seat heating, it could be a faulty heating element or a wiring issue. You can use a multimeter to check the continuity of the heating element. If both checks don't reveal the problem, it might be best to take your car to a professional mechanic for a more thorough diagnosis. Please update us on your progress. Do you have any other questions?