Heater Control

[kenfoxy]

Got this clicking noise behind the dash which goes away if I turn the heater up to 28c (max). From what I have read it could be the servo motor which opens and closes the heater door. If it is, they are quite expensive to replace. Has anyone had this problem?

[kenfoxy]

May be on to something. Removed the glove box lid. There are a number of black boxes (servos) which open and close various doors for the heating and ventilation system. The lowest one I put my hand on as I moved the temperature dial. I could feel the mechanism working. I could also see a white lever behind it which moves up and down with the alteration in temperature. Couldn`t remove the servo to have a look inside so I just sprayed the operating arm as best I could with WD40. The clicking noise has now gone away. For how long I don`t know.

[sjrainsford]

Mine was doing it for a while then stopped. All seems to work correctly in automatic mode though.

[kenfoxy]

I think maybe things get very dry under the dash for all the mechanical gears and operating arms and ventilation doors. If you add in the dry a/c then it, maybe, is not surprising.