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#1
09-27-2006, 05:13 PM
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1998 C230 Air Conditioning help needed
I have a 1998 C230.
My problem occurred a week ago when we were on the highway. My air conditioning stopped cooling. I set the unit a few degrees lower and increased the fan speed. This did not help. I decided to head back home. After I existed the freeway, about 2 miles on surface streets, it began working again, very well. I have used the car twice since then. It seemed a little slow to initially cool, but is working fine. I have not had it back on the highway yet. Any suggestions would be appreciated. P.S. What is a good manual for A/C repair on this car? I bought the Chilton's version, and it very lacking. 
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#2
09-27-2006, 05:36 PM
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Mine did something similar to that yersterday. I had left the setting on 74 from the previous day when I had the AC on (keeps it from getting too cold). The car had been parked in the shade and so was pretty cool inside. I pull out into the sun and the heat goes on!!. So I am driving in the hot sun with the heat on. So I pushed the temp down to 64 but this had no immediate effect, heat still on. So I pushed it down to 55, still heat coming out. Finally I went all the way to LO or whatever it says and it finally started blasting out cold air. My conclusion was that there is a delay in the feedback loop for the temp control. Sounds sort of like what you are describing.
Mike
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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine) 1988 F150 144,000 miles (leaks all the colors of the rainbow) Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra
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#3
09-28-2006, 08:07 AM
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The heater valve (mono) is the most likely problem.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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