S60 Diesel PTC Heater Issue

Sounds similar to a problem I had with my old Renault Megane, although it was a petrol engine. Cold air blowing when it should be warm, like the heater's on strike? Any chance it's something like a blown fuse or a relay switch sticking before you go ripping things apart?

I've already checked the usual suspects; fuses and relays are fine. My suspicion is that the heating element within the PTC heater itself has failed. Did your Renault exhibit the same error code situation?

Ah, you've gone deeper than I did! On the Megane, the diagnostics were as clear as mud. I ended up taking it to a garage where they confirmed the auxiliary heater was toast. Best to get it checked out, it sounds like you know what you are talking about.

Thanks for confirming my suspicions. It seems a trip to the workshop is unavoidable. Just got a quote - looks like around 350€ to sort it all out. I'll post again when it’s fixed.