My heater blowing cold air n a/ c not very cold had freon ckd n its ful

Tiny
SLAMMINS
  • MEMBER
  • 2002 MERCEDES BENZ 230TE
  • 290,000 MILES
My main concern is heater blowing cold air I'm in Tn. And its already cold out what causes that? Fan working great this summer my air never really got cold either had freon ckd n it was ok o please reply asap as I'm freezing to n from work
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Tuesday, October 22nd, 2013 AT 3:38 PM

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Tiny
TY ANDERSON
  • MECHANIC
  • 684 POSTS
First I would check the cabin air filter for restriction. If this filter is not restricted. I would suspect one of the doors that controls the temperature. For example if the temperature blend door is open half way (or broken preventing the stepper motor that controls the door from moving the door) it's not going to blow very cold or very hot because both hot and cold temperatures are mixing.
Have the climate control module scanned for fault codes. This will give you a starting point if there is a malfunction detected within the climate control.
Let me know what you find. TY
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Sunday, October 27th, 2013 AT 2:21 AM

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