What might be the cause of this A/C problem?
My car is just 4 years old - '04 Sable OHV
I'm in the south and it's extremely hot these days.
The A/C is just barely cool and not COLD at all.
I ever rent some cars and I can feel the difference.
I have a mechanic check the pressure of the system
and was told the refrigerant level is OK. I once tried to
charge some R134a into the A/C but almost little into it.
My guess is that:
1) Could the blend door be the perpetrator? I heard that
there are some issues about it. If the blend door is stuck
at some position and cannot be completely shut off, there
will be some hot air leaked from the heat core. Where is
the blend door and how to check its position?
2) The evaporator could be coated with some mold over time
and the heat transfer is affected. How to check that if so?
3) The A/C of Taurus/Sable is like that, don't expect too much.
Thanks for your input.