A/C problem with my 1993 Buick Lesabre Limited
Mileage = 180 000
Engine size = 3.8
GM tech = JK
question = When I press on the "Auto" button to turn on the A/C, the Dual Climate
Control system switches to "Econ" mode as well as the temperature on the display
flashes for about 2 minutes after starting the car. Also, when I checked for codes on the
climate control by holding the Off and Warm buttons together, I got " 141 " and " 48 ".
Before when the " auto " feature worked and the display didn't blink, the A/C worked
fine and blew cold air. I noticed that the A/C wasn't blowing enough cold air so freon
was added. Three days later the A/C compressor continued to work in the "Auto" mode,
but the air in the car started being warm. When I checked the freon in the system, the
pressure was high and the compressor still worked, but the air was still warm and the
refrigerant lines and condenser were warm. Since the pressure was high, I properly
removed some freon from the system to lower the pressure. Then when I added a bit
more freon to get back to the normal pressure level i!
In the system, the A/C compressor stopped working and the " Auto" mode is disabled.
Also, I noticed that when I added freon, the lower part of the refrigerant line was cold,
but the upper part of the line towards the condenser was warm, as if it was plugged and
didn't want to recirculate. I checked the compressor by adding a small amount of
voltage to the A/C compressor relay, and the A/C compressor does work. It just doesn't
automatically because now the "Auto" button is disabled, and it automatically switches
to "Econ". Would it be possible that there might be a " clog " in the system not letting
the freon recirculate? What is wrong with the A/C system?
JK:
You may have more than one problem.
First things first. Evacuate the freon and add the proper amount. If the amount removed
was less than the correct amount, add dye and freon and check for leaks.
After the charge is correct, disconnect the battery to clear any codes in the controller
and check the function. If charge was good to begin with, you might have a restricted
orifice tube.
If still switching to ECON by itself, you may have a faulty control head.
Mileage = 180 000
Engine size = 3.8
GM tech = JK
question = When I press on the "Auto" button to turn on the A/C, the Dual Climate
Control system switches to "Econ" mode as well as the temperature on the display
flashes for about 2 minutes after starting the car. Also, when I checked for codes on the
climate control by holding the Off and Warm buttons together, I got " 141 " and " 48 ".
Before when the " auto " feature worked and the display didn't blink, the A/C worked
fine and blew cold air. I noticed that the A/C wasn't blowing enough cold air so freon
was added. Three days later the A/C compressor continued to work in the "Auto" mode,
but the air in the car started being warm. When I checked the freon in the system, the
pressure was high and the compressor still worked, but the air was still warm and the
refrigerant lines and condenser were warm. Since the pressure was high, I properly
removed some freon from the system to lower the pressure. Then when I added a bit
more freon to get back to the normal pressure level i!
In the system, the A/C compressor stopped working and the " Auto" mode is disabled.
Also, I noticed that when I added freon, the lower part of the refrigerant line was cold,
but the upper part of the line towards the condenser was warm, as if it was plugged and
didn't want to recirculate. I checked the compressor by adding a small amount of
voltage to the A/C compressor relay, and the A/C compressor does work. It just doesn't
automatically because now the "Auto" button is disabled, and it automatically switches
to "Econ". Would it be possible that there might be a " clog " in the system not letting
the freon recirculate? What is wrong with the A/C system?
JK:
You may have more than one problem.
First things first. Evacuate the freon and add the proper amount. If the amount removed
was less than the correct amount, add dye and freon and check for leaks.
After the charge is correct, disconnect the battery to clear any codes in the controller
and check the function. If charge was good to begin with, you might have a restricted
orifice tube.
If still switching to ECON by itself, you may have a faulty control head.
