93 cad. sedan de ville the climate controll reads only a ( d )nothing else and none of the other buttons will work / off ,out side tem. , econ ect. and the a/c is running. also which buttons do you use to access the engine codes ? by the way i try unhooking the battery to reset ! didn't work . thanks rusty.
I've not done this for the reason you speak of, but I was told to disconnect the battery from both terminals and hook the 2 cables together and leave it that way for 30 minutes making the computer forget what it was doing. Reconnect the battery and find if it worked for you. There's no power anywhere when the battery is disconnected, so no harm is done. This method turned out my ABS light when nothing else worked after repairs were done.
SOURCE: the climate control system will not work in Auto
Your A/C system has lost its refrigerant, and will automatically go into "ECON" at that time. System will have to be leak tested , repaired, and recharged. Hope this helps.
SOURCE: 1992 SEDAN DE VILLE CAD...AC BLOWER MOTOR FAN HAS
Since replacing anything could cost hundreds of dollors, would you really replace it from a suggestion or would you prefer to get it diagnosed properly. It gets expensive when you just throw parts at a car. This really need to be diagnosed properly ( hands on with the proper equipment).
Testimonial: "thank you"
SOURCE: have codea 12-19-30-41-52-91 f10-32 please help
ECM Trouble Codes
12-Distributor signal fault
19-Fuel pump circuit fault (short)
30-Idle speed control (isc) motor rpm out of range
41-Camshaft position sensor (CMP) or circuit fault
52-Electric control module (ECM) reset
91-Park neutral position switch or coicuit fault
BCM Trouble Codes
10-Outside temperature sensor or circuit fault
32-Electronic control module (ECM) to Body control module (BCM) fault loss of communcation
Source: Haynes repair manual
SOURCE: 1991 Buick Park Ave. climate control stopped
Check to make sure that you have enought freon to engage the compressor, then you will need a flow chart to take you through the rest of the steps necessary to diagnos this problem. The Electrical system manual for Buick is the only one that will have the proper information for you to walk through the steps to dead head it. There is a HVAC programer that is behind the floor heater duck work. It has a numbering system that goes from (2) rows of pins that go 1-16 for terminals.On terminal 5-7 with ignition in run position, you need bat. votage. Terminal 10 & 11 you need 4-5 volts. Neither 10 or 11 should be unplugged just yet since 10 feeds 11 pin. If there isn't any voltage at these pins, check for corrosion on the pins theirself, or for the pin that it may have slipped back out of the connector. Good luck.
SOURCE: I have a 1996 Cadillac Sedan DeVille. This spring...
If the a/c does not engage as a result of the electronic control system in your 1996 Cadillac, the climate control system may need to be replaced.
However, if the problem is being caused by low charge of R134a in the system, have the system charged before changing that electronic part.
I have never seen a Cadillac Climate Control System do this, which leads me to believe that it may be more electronic than refrigerant pressure related.
If the refrigerant pressure was low in the system, the climate control system should still stay on 'auto' mode, I think, and simply blow warm air.
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