Mercedes C220cdi w203 heater problem solved

[Yuri84]

Ater i replaced top unit,then it does not matter if door is open or closed,i can control what temp i get from the vents.
Actually its how i found out that ac unit works and i can control temp. My mate was having a look inside the car and i told him my heater/ac unit is playing up and cant control temp. He then tried and it was working great,so i thought maybe it fixed itself,but after i closed door and drove off i straight away felt that temp is back to square one. I poped to one garage,a guy i know runs it and he was workin in mercedes for ages. I told him whats up and he said that i should replace that thing with lights up top,by rear view mirror. So i did it and it worked great and still does after car was sold.
I think that switch on the door kinda dissables that top lighting unit when door is opened in and turns another thermometer on somewhere in the car. That is only my opinion though.

 

[Yuri84]

Wow £700. I want a car for that.

Well I got it up to temp and if I open the door it makes no difference. Wonder why the door is in circuit?

Once the engine is hot and if it’s on climate control auto. On the lowest setting it’s full speed cold. Every setting above that is full speed hot. Until the engine is up to temp it’s more or less as it should be.

I already have the lower control and can get the top for £20. I don’t mind spending that but have a horrid feeling a flap is stuck.
I assumed when I blew the dust out it damaged something but I had a look inside of the lower control if very robust bad dont think that would hurt it.

you was lucky you found the answer on yours.

Thanks Ken

Yep,i thought that too. We only paid 1600 for the car and it was couple years ago.

 

[Petrol Pete]

Or maybe the door opening switches on the light in the unit and if the unit is faulty it does not like the light being activated ☢ ?

I know two different Yuri's . One is a big Russian (who lives between homes in Ireland and Russia) and the other one is a White Jamaican Jew who lives in Jamaica.

Can't say I know a Yuri who lives in the UK

 

[Yuri84]

I am big Russian/Lithuanian bloke and live in Hereford in UK.

 

[Petrol Pete]

I am big Russian/Lithuanian bloke and live in Hereford in UK.

OK, so now I know 3 Yuri's !