1999 GMC Jimmy climate control problem

Moejoelee · 04-11-2009, 04:31 PM

Hello, I had a problem with the climate control blowing continuos hot air. I changed the temperature door motor and the electronic climate control unit. I now have the ability of temperature change from warm air to, well lets say ROOM temperature, but NO COLD AIR!!!! A/C compressor is in fact working as the line coming from the compressor and by the firewall/passenger side are COLD, but the air coming from the vents are like I said "room temperature" not A/C COLD. What else is there to fix????? Oh !!!! and resetting the ECC did not help!!!

MT-2500 · 04-11-2009, 05:47 PM

Quote:

Originally Posted by Moejoelee

Hello, I had a problem with the climate control blowing continuos hot air. I changed the temperature door motor and the electronic climate control unit. I now have the ability of temperature change from warm air to, well lets say ROOM temperature, but NO COLD AIR!!!! A/C compressor is in fact working as the line coming from the compressor and by the firewall/passenger side are COLD, but the air coming from the vents are like I said "room temperature" not A/C COLD. What else is there to fix????? Oh !!!! and resetting the ECC did not help!!!

What did you or how did you reset it?
Like
Recalibrate it?
Key off remove.
RDO/BATT fuse for over a minute.
Plug fuse back in and turn key on and see if temptmotor swings full hot and the full cold.
Did it?
Always confirm good engine vacuum to controls
If all of that does not help pull HAVC codes with a body capable scanner and post back codes.

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