red-oak said:
I have two problems one I can't get the codes to come up the other is service A/C came on and blowing warm air. When I push the off and warmer on the electronic climate controller and hold them it will flash lighting every thing in the display then gives me three dash lines (---) and in the upper dash the service lights lite but shows 0 in the mph screen. I put a set of gauges on the low side of the A/C and have 100 psi and when I bought this car they switched it to 134 coolant when I push auto on the climate control is goes to econo and the service A/C comes on for a min then goes back off still blowing warm air
Codes will read out on the fuel data center screen which is behind the left hand side of the steering wheel. The electronic climate control is used to monitor the car while running. Various lights correspond to various parameters. For example the Econ light if illuminated means the car is running rich, if it's off it means it's running lean. All lights in the ECC have a meaning.
After you press off and warmer look at the fuel data center and get ready to write down the codes if any.
As far as the Ac, you'll probably throw an F47 for low refrigerant. That is why the Ac switches from auto to Econ. It is by design to shut the compressor off so it doesn't burn out when low on refrigerant. (Thank you Cadillac engineers)
Check those codes again and look at the FDC and let us know.
If your low on freon chances are you have a leak and need to fix it. I had similar Ac symptoms and rolled the dice to recharge with R12 and hope it won't leak. So far so good.
R134A molecules are physically smaller than the R12 and will have more of an ability to leak from your existing system