Jumpy Defrost Issue

I had similar defrosting and heating issues with my Jumpy. I also suspected the air distribution flap. Did you check if the air circulation flap is working?

I haven't checked the air circulation flap. Is it easily accessible, and could a faulty one really cause the same symptoms as a faulty defrost air distribution flap?

In my case, the defrost air distribution flap was the issue. The air circulation flap can affect HVAC performance, but your symptoms point more to the defrost flap. I'd advise a workshop check for accurate diagnosis.

Took it to a workshop, and it was the defrost air distribution flap! Defective cable connection. Repair cost 95€, but my Jumpy is toasty now!