W124 Heater problem

[Chippydad]

Hi all, got a problem with the heater, its on all the time. Both control wheels are on min. hot air is expelling from the vents.

 

[jberks]

Do a forum search on "duovalve" - more info than you can shake a stick at!

 

[mike65]

Its fixed

http://forums.mercedesclub.org.uk/showthread.php?t=17868

Mike.