Question-Roland, Thank you for your quick responce to my question dated 5/4/06 reference to 2000 Chrysler Cirrus Heater/Air Conditioner Temp Control Regulator which was very explanitory in regards to control units that have manually operated slider control levers connected to cables that open or close temp control doors but on my 2000 cirrus the heat or cool control and various degrees of either is controled by a rotary multiable electrical contact switch which apparently diverts temp control door.
Have checked owners manuel for fuse pretaining to
this control but have found none. What now ? How to test circuit or temp control door operator ?
thanks again,
Robert Myers
Snail mail Robert Myers
2293 Bruce Dr
Pottstown Pa. 19464
Roland,
Reference to above subject, all functions of the Temperature Control System (blower fan,fresh air,recirculated air,defroster and air conditioning)all apears to work correctly with the exception that the temp control selection switch WILL NOT regulate the hot water flow threw the heater core.When motor is warmed up the heater always puts out very hot air even if the control is set in the air conditioning mode.
When in air conditioning mode the hot air will be cooled very slightly but the cooling effect is not able to compensate for a wide open flow of hot water threw the heater core. (P.S. the motor dose not over heat and runs at normal temp.) I have searched for some form of hot water flow control valve or modulator but cannot find any.
Also I have tried to check out the temp selector switch but am hesitant to attempt to remove control panel from dash board.
Can you give me some guidance to correct this problem?
Thank you,
Robert Myers
Answer -
Hi Robert,
There is no hot water control valve. The system always sends hot water to a heater core and the air temp is controlled by a door that passes the air that has gone thru the AC evaporator coil to the heater core to a lesser, greater, or not at all degree via a temp control door which is operated by the temp control cable attached to the temp control knob. Either the cable has detached or the door lever is broken or some other mechanical issue is preventing that temp door air diverter from by-passing the air around the heater core. I have the repair manual for the '96 Cirrus which shows the set up and how to remove the control from the console and service the cable. I would be pleased to xerox and snail mail it to you. So drop me a postal mailing address if you would like.
Roland
AnswerHi Robert,
I was unaware that you have the ATC type of unit with a digital readout. That was not evidentally available in the '96 model and I am uncertain when they first offered it in the Cirrus.
There is an electric positioner of the blend air door that may be what is your problem. The earlier units had a self-diagnostic capability that recorded faults as coded two digit numbers. Here is how you could get them in the mid-'90s:
Have the engine idling and set the temperature on the panel to 75 degrees, then push in and hold the Floor, Mix, and Defrost buttons all at the same time until the display section blinks, then release the buttons.
The control display will continue to blink, and then show two-digit trouble code numbers if any are present, they range from # 23 to # 36.
Only one code can be displayed at a time, but pressing and releasing the Panel button will display the next code if present. If no more codes are present the display will return to normal.
Write back with the code #'s if any and I can decode them.
You might also get the code deciphered at
www.allpar.com/fix/codes_climate.html
I have the manual for the '94 LH model ATC unit, but I can't be sure it will apply to your system.
So let me know what you find out and I can xerox and snail mail you the pages from that earlier manual. It could either be the positioner or the feedback loop.
Roland
