Question about 1996 Cadillac DeVille
As you have charged the system with 134a refrigerant.But did you checked for any leakage of refrigerant in the system. Ac stops running on hot conditions this indicates few possibilities. Check the refrigerant level in the compressor of car ac.If its low then car will compressor will overheat and stops running. Also check the coolant level.If its low then it needs to be full.Also check if there any leak of the coolant.Get the ac pressure test done.It can be done at any local car garage.This will confirm whether there is refrigerant or coolant leak in the system causing the ac to stop after sometime.If coolant and refrigerant all checked OK.Then the thermostat needs to be checked.When the car temperature reaches certain temp the cooling fan turn on and cools the thermostat.But if the cooling fan stopping after ac turns off then thermostat needs to be checked.Also connect the fan connections to car battery and check if the fan is running directly.Check the voltage at fan terminals.It should show exact 12 volt.If less then that then fan is faulty and needs replacement.If fan tested OK then thermostat needs to be checked and replaced.Also check the coolant temperature sensor.If this sensor is not working then this will make the vehicle overheat and this will stop the ac and it stops running.---------- Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.
Posted on Aug 07, 2010
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Posted on Jan 02, 2017
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There's not really a diagram for the actual removal and installation. A good repair manual might list steps like these: First, your system needs to be purged of the freon. Next, unplug the AC clutch/pulley assembly at the front of the compressor. Remove the belt, then the AC lines on the compressor (usually in the back), then unbolt the AC from any mounting bracket(s) and remove. To avoid having to press on and off the clutch/pulley assembly you might want to make sure you're buying a complete compressor assembly. Read and follow those directions concerning oil for the compressor. After installing the new AC, reconnect the lines with new "O" rings. Most if not all compressor manufacturers will not honor any warranty unless you change out your orifice tube (also called an expansion valve) and accumulator (aka the dryer) at the same time. Recharge the system with the appropriate amount and type of freon, most likely R-134a.
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