cannot refill freon
My 87 300SDL is at the garage getting AC looked at. Mechanic states that freon was empty so he is trying to charge system. So he purges the system and added freon but it would only allow him to fill it to half. Compressor still has not started. And it is blowing out hot air from vents. He is going to put a hot wire from the battery to the compressor to see if he can get it to start. The CCU is another rebuild so I did not even pull the Klima to test to see if there was a signal coming from the CCU. But what is the issue related to the excess pressure where the mechanic cannot fill the sytem completely?
Thanks
A
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1987 300SDL
187,000 miles
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