Air Con Problems

Maddog691

New Member
Joined
Jun 8, 2008
Messages
4
Reaction score
0
Hi,

I have a 1998 E300 Turbodiesel with an Air Con issue.
When the car is used for the first time of the day, the air con works fine and will do so for the rest of the day providing the engine is not switched off.
However, as soon as the engine is switched off, be it after 1 min or 5 hours, the car only blows warm & will do so on all subsequent starts all day long, changing the position of the temp selector has no effect. Occasionally, the passenger vent will operate correctly and blow cold, but this is a random event.
During the fault, the car temperature is correct, the water levels are good and no other problems seem to be happening.
Can anyone help me out on this one, even a good direction to head in would be a start.
 

dave.robbo

Senior Member
Joined
May 24, 2008
Messages
311
Reaction score
2
Age
54
Location
Gloucester
Your Mercedes
2004 SLK 350 R171
I think if it was mine, I'd book an appointment with a local air con specialist, to get them to do a check/service on the system..
 

brandwooddixon

Senior Member
Joined
Jul 31, 2006
Messages
4,367
Reaction score
1,212
Location
Wolverhampton
Your Mercedes
S63 Coupe 2014
It could be a problem with the duovalves, which control the airflow mixture to the interior. They tend to stick with age, leaving you with only one temperature. A light tap will confirm this. There are threads on here regarding this issue.
 
OP
M

Maddog691

New Member
Joined
Jun 8, 2008
Messages
4
Reaction score
0
  • Thread Starter
  • Thread starter
  • #4
Thanks for the tips Chris & Dave. Where would a light tap need to be applied Chris?
 

BlackC55

Senior Member
Joined
Feb 23, 2007
Messages
2,488
Reaction score
0
Location
South coast
Your Mercedes
C43
Look under the bonnet near the brake fluid resevoir and there is a valve with coolant pipes attached to it. That is the duo-valve
 


As a member of ourMercedes Owners' club, you will enjoy numerous savings on an expanding range of services including, Insurance, Parts and Servicing, RAC Membership plus much more.MBOmembers can save around £200.00 a year. You can join from as little as £30.00 and start to enjoy these savings immediately. You receive our monthly magazine and free classified ads when you decide to trade up a model.
Top Bottom