My W124 E220 seems to have A/C trouble since past 15 days. Sometimes A/C does not blow cold when switched on, it automatically starts blowing cold after sometime(If I press defogger button, A/C seems blow cold air bit earlier), but the temperature control does not work when this happens. Irrespective of temperature control position it keep blowing cold air, if i set the temperature setting to full hot with a click it starts blowing hot.

What should I check?


Thanks