Does anybody know what controls the blower motor speed in the 107?
Mine is only running at one speed. I thought it was the regulator
attached to the firewall just to left of the blower motor. However,
when I discoonected the multi-wired plug on the regulator, the blower
kept running, until I disconnected the multi-wired plug behind the
servo. Does anybody happen to know what the voltages on this plug
should be at high and low speed settings, and/or how the regulator
and/or servo figures into the mix? I could use some help!
Your car has the Chrysler designed climate control system. It's
controlled by a small logic board called the "amplifier"; the "servo" is
the valve body for the heater, the vacuum flaps and, I believe the
blower speed too. The amplifier in 123 and 116 models is located behind
the glove box, I don't know about the 107.
If you determine that major repair is necessary you should take a look
at the Digital Climate Control Retrofit Kit sold by
performanceproducts.com. I just installed one last Friday.
Additional thought: I wrote (about servo's functions)
I believe the blower speed too. ( based on the input from the amplifier
as to cabin temperature's deviation from selector setting - the farther
away the higher the blower speed).
Thanks for the info. When everything was working fine, I think the
blower speed only changed in response to the Auto- Lo and Auto-Hi
button in the A;C section of the control panel, not to the cabin
temperature. And I tried replacing the amplifier with two used ones
someone gave me, but the blower motor speed didn't change All three
could have the same problem, but it would be hard to believe. Where is
the cabin temperature sensor and how can I see if that's working?
On Wed, 10 Aug 2005 11:47:10 -0700, "T.G. Lambach"
The outside and inside sensors make a chain whose continuity can be
checked - but I can't tell you where to check it on the servo based
system. M-B has a tester for that system and their trouble shooting
chart refers to that tester.
If your complaint is a single blower speed while on AUTO the choices
seem to be blower's resistance - but then it would have only a single
speed at all times - the amplifier, or the cursed servo.
On the other hand, if it works well enough to keep you warm or cool -
just keep driving until it quits!
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.