So I can hear an electric motor or fan running at odd times while the car is parked and not running. It wears down the battery so the car wont start. The AC needs a new pump and the heater defroster doesnt work either, but will come on sometimes. it doesn't show on the diagnostics computer.
If its under the hood then it is your cooling fans
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SOURCE: 2003 cadillac cts
That's what was finally found by our Cadillac dealer as well. They charged us too much, though.
SOURCE: 88 cadillac deville, ac blower fan wont shut off,
Ralph,
Most common cause of this is the blower fan (proper name for the fan you refer to) continuing to run is a shorted out Electronic Climate Control Module. This solid state device replaces the older style fan speed resistor block (at about 4 times the price) This unit is found on the top of the HVAC box under the hood. (HVAC means heating, ventilation and air conditioning) The HVAC box is found on the passenger side of the firewall. Look behind the A/C's accumulator. It will have an electrical wiring plug on top of it. It will be fastened to the HVAC box with a few 7mm hex head screws. Very easy to change.
FYI, do yourself a favor and replace the blower fan motor at the same time. The Electronic Climate Control Module usually fails because the motor is drawing to many amps of current. This is because it's bushings are worn out or the brushes are worn out.
This is very common on Cadillacs and Buicks.
Charlie
PS Not sure why car won't start. Either you drained the battery or blew a fuse which controls starting the engine. Need more info regarding the "no start" condition.
SOURCE: '99 cadillac eldorado, Northstar engine w/AC problem
Have you unhooked the battery since you put the freon in? If not, do it.
SOURCE: 1991 cadillac deville NO HEAT
I had the same problem in my 1991 caddy, and turned out to be the blend door. It is located in back of the glove compartment. There are two kinds, the automatic blend doors and the manuel ones. Since the temperature is automatic and programmed to stay where it is set, it would be an "automatic blend door". Not a hard fix...
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