Question about 1988 Cadillac Eldorado

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No heat, and it's cold out!

Could be a stupid question, if so I apologize----last week I get a sudden warning on the little computer screen my a/c refrigerant is low, then immediately afterward it says "compressor off". Local mechanic says evaporator core needs replaced.....

I can live without a/c during the winter, but the hvac controls won't let me just turn on the heat, every time I touch anything it says "low refrigerant/compressor off". The only time heat will come through is if I select defroster, then drive the car down the interstate. Then warm air will blow in through the defroster vents by the windshield, but not very hard and not very warm.......ugh, what can I do? Is there a way to get the heat on without spending big $$ fixing the a/c right now?

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  • Richard Scordino May 11, 2010

    There likely is an easier way to do this but if you jump across the high and low pressure cut-off switches in the a/c lines and unplug the compressor it might work. But, you may need to connect the compressor leads to a "dummy load" with the same resistance as the compressor clutch coil to completely fool the computer into thinking the system is working.



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You have the same problem as i do. You have a leak on the heating side of your climate a/c works fine all summer and then when I turned on the heat the comp. said low refridge/ comp off. You will have to get the system recharged and then have a mechanic find the leak.if you dont use the heat it will not leak and your A/C will always work.

Posted on Jan 21, 2010

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Sounds like it is low on freon , R12 if it has not been converter to 134a , if it is R12 THIS REFRIGERANT IS NOW VERY EXPENSIVE ,and you might want to consier convertion kit , but now back to recharge ,it is tricky but can be done get a recharge kit of proper refrigerant hook to low presure side fill tap turn upside-down to release liquid and open valve with the car off and motor not running turn all the controls to ac high position with the motor still not running remove the neg side of battery terminal for at least 2 minutes ( now you have to be quick with this next step ) have someone in the car ready to start it on your command , hold the refrigerant can upside down and replace the negitive terminal to start the car ( you must be quick with this step )you should see the ac compressor start to turn the clutch portion on front of course the pulley always turns , what you are trying to do is get some charge into the system before the computer gets the signal from the low presure switch to turn the compressor off , repeat this processor until the compressor continues to run add the remainder on the can of refrig to system and if the compressor continues to run add another , unless you have a large leak this should get you through the winter with heat this works in many cases ,good luck

Posted on Dec 31, 2009


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