1998 Cadillac DeVille Q&A
1998 Cadillac DeVille Question: Air conditioning blower problem
The air distribution on your Deville is vacuum controlled. Before replacing any parts make sure all of the vacuum hoses under the hood are properly connected with no vacuum leaks. Also make sure the vacuum reservoir and check valve are not leaking. If everything under the hood is ok the programmer controls the vacuum inside the car, that could be at fault also. As you can see, there are a lot if things to check before replace the "up-down valve", as it is correctly called. - Russ
my air condition is not working at all not even the heater. no cold or hot air coming out.no wind at all coming out of vents when air condition is on
fine. Now no cold air. compressor and blower on but no cold air. Notice it is making a squealing noise when I turn it on. Is there a belt that runs the system.