PeachParts Mercedes-Benz Forum - View Single Post - All of the AC facts in one place.. Divine intervention needed???

stevebfl · #13 08-02-2003, 03:09 PM

Well I disagree.

The pressures don't look like a system that is overcharged. The high side is low if anything. The problem might not be refrigeration, but the low side ain't all that great.

It absolutely doesn't look like a restricted system as the low side would at least look better if there was a restriction.

There is a possibility of a too open expansion valve but the calibration for 134 should restrict the flow if anything, not open it.

The 126 car can be one of the worst for internal airflow blockages through the evaporator and the lack of control by the recirc doors will kill 10-15degrees of duct temp. The recirc is two stage. The first stage causes about 70% of the air to be recirc and is set in place whenever the AC is on. Left in the 100% vent condition the air will be 10-15degrees warmer.