My heater seems to be stuck in the on position. I only get heat out of the vents and when i select cold air on the thermostat...nothing. My A/C won't turn on either, i can't get the compressor to turn on. It seems my whole climate control system is pretty dodgy. I don't think the vents open and close either when i press the different buttons to select the different vents. Should i just replace the climate control system or is there an easier way to fix these problems? This is out of a 1986 190E 2.3L 8V. Thankyou for your help!!!

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George Carstens