Am lost 😤😤

Heaters  are at different temperatures, drivers/passenger side even though set at same temp 

Tried all sorts today, stripped glove box out and knee air bag on drivers side etc to watch all the flaps while doing reset. 
All seem to be working fine

Had all four temp sensors out and checked with multi metre and again all seem fine 

Anyone any idea what could be the cause ? It suddenly happened ( drivers side went cold) 

drivers side is cold or just seems to get hotter and hotter if you seem to go above 20 on dial 🤔

Edited 23 October, 20223 yr by Snapper1725

From what ibe read on here it definitely sounds like a thermostat issue. I'd try swapping passenger for driver and see if the fault moves.

Also is the external stat working OK as apparently this can have an impact on the internal temperature?