Run the actual value test through the control head. Pay particular attention to the evap temp sensor. If it reads 150 degrees replace it. if one does this test after the car has sat a while (like overnight) the first 5 or six sensor values shouls all be the same (ambient temp naturally)

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician