Anybody any ideas re lack of heat coming through the vents - did have an issue with oil cooler recently with oil going into water header tank .my mechanic changed the oil cooler so now water is clean but can still see evidence of oil in tank stuck to sides ,I did wonder wether oil had coated something preventing heat getting through somehow. My mechanic did mention some washing powder could be added to water and circulate it for a while to remove oily residue then flush the system .Temp guage seems to get to right place around the halfway mark .Any advice accepted 

I assume as the heat is created electronically, could an element have gone, simple as that?  Or some part of the circuit?

1 hour ago, JamieH86 said:

I assume as the heat is created electronically, could an element have gone, simple as that?  Or some part of the circuit?

No, the heat is taken from the coolant by a heat exchanger.

 

On 10/07/2024 at 21:30, davidbird said:

I did wonder whether oil had coated something preventing heat getting through somehow

I agree that the likely cause is oil in the heater matrix but don't rule out a failure of a flap servo in the heater unit.

Search for climatronic (if you have it) test. This is done by pressing several of the buttons on the panel to initiate a full test and reset of the unit. It should also report a failed part as a code number. The buttons to press vary between models and years.

Have you tried manually changing the settings? air distribution? temperature setting? recirculation etc? This may pick up a failed function.