Update:

Removed evap temp sensor--Ohms check good, values in line with chart provided in service information.

Reinstalled sensor.

Connected gauges, after 10 minutes and at 2000 rpm windows down doors closed max cold and max blower high side about 19 bar (280 psi), low side about 2 bar (29 psi). OAT about 29c (85F)

Vent air felt cold but I didn't have a thermometer....... Pressue values are in line with performance chart in service information. (high pressure maybe very slightly low, but compressor is original--223,000 miles...) No ice forming on low side plumbing.

Is there something that could cause an intermittant icing condition?

Thanks for reading.

J. M. van Swaay

__________________
1994 E320 Wagon, 230,000 miles
1995 E320 Sedan, 106,000 miles
1994 E500 Sedan, 79,000 miles