Had my '93 850 checked recently for problems with the climate module...
1. fan doesn't blow unless on a higher setting (blower issue?)
2. vents won't respond to dial (air blows moderately from all directions, will not concentrate to defrost/floor)

Error codes as follows:

132 Driver’s side air duct temperature sensor open circuit or
shorted to 12 volts
141 Faulty signal from driver’s side temperature selector switch
211 Driver’s side damper motor position sensor open circuit or
shorted to 12 volts
231 Ventilation damper motor position sensor open circuit or
shorted to 12 volts
233 Floor/defrost damper motor position sensor open circuit or
shorted to 12 volts
324 Floor/defrost damper motor active too long
416 No control voltage at passenger’s side interior temperature
sensor inlet fan
417 Passenger’s side interior temperature inlet fan seized
418 No control signal to blower fan power stage
419 Faulty diagnostic signal from blower fan power stage

Any thoughts/experience on the most cost efficient way to rectify this matter?!
Many thanks!

 

To me (Electrical/electronics Engineer)it seems like you have an open ground on your climate control circuit. All signal lines are being pulled up which is common for microprossesor( or MCU) input circuits that have lost ground. Code 324 is occuring only because there is a time out in the control circuit that the MCU is sensing and creating a code.

Any way there are many indicators to an open ground or 0vdc

Hope this helps

Bob

 

I have to agree with Bob. The system is reporting an error with every componet in your climate control system. A missing ground is the only thing that could cause all of that at once. It might not be missing but a weak or bad ground connection is the same as missing. Good luck