W210 A/C problems - PeachParts Mercedes-Benz Forum

tjts1 · #1 05-21-2018, 09:56 AM

Quote:

Originally Posted by kendogg

Tjts1, I've seen that on other cars with dual climate control, low refrigerant causing air to be cold on one side, not on the other. I don't think that's my issue here. I don't remember how much refrigerant I put in, but I typed into the machine however much the sticker said.

When was the machine last calibrated?

Are you getting any hissing sound from the center dash when the AC is on? My expansion valve hisses very loudly when it's low on refrigerant. I think gauges and TP chart is more reliable way of charging the AC. On the w210 when refrigerant is low, it's always the driver's side that runs hot.

kendogg · #2 05-21-2018, 11:30 AM

Quote:

Originally Posted by tjts1

When was the machine last calibrated?

Are you getting any hissing sound from the center dash when the AC is on? My expansion valve hisses very loudly when it's low on refrigerant. I think gauges and TP chart is more reliable way of charging the AC. On the w210 when refrigerant is low, it's always the driver's side that runs hot.

No idea on calibration. Sitting here fully charged, with questionable fans, I'm seeing ~40 psi low, ~240-280 psi high. Hence why I was looking into fan issues first. I don't notice any hissing sound, no.