1994 C280 auto climate control problem
unit will not work in auto mode. will put out hot air only on HI setting. otherwise puts out cool air on other pre set temps such as 74 degrees. inside senser replaced by local expert(sic) after he claims he diagnosed the problem, said it could take many hundreds of dollars to diagnose further. local cooling shop traced the problem to either the control valve or a pump but they said they could go no further.
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