So the AC in my 17 expedition is adequate, not what I'd call ice ice cold but it does the job, even more so now that I've tinted the front windows to 20%.
My other vehicle is a 12 focus, and I've asked this question in the focus forum but there didn't seem to be a wealth of knowledge or responses to AC questions over there like there is here. I'm just not sure how to interpret my high and low pressure readings
My AC will get bone chillingly cold when it is above 90 but is mediocre below that temp and seems to cycle between vent and AC when outside temp is below 90 as well, even when set on max AC setting. It uses a constant AC pump so you only hear it engage once when turned on and the compressor clutch remains engaged at all times (there's a name for this type of compressor but I don't recall off hand). Anyway, my low side pressure never goes above 32 and the high side pressure is 220 which seems to indicate proper fill. However I have added refrigerant when I bought the car and the AC got noticeable colder but with no change in pressures or cycle time.
If my compressor were going out, would it not be able to maintain the low side pressure high enough (I think for the 90-100 degree temps we've been having it should read 35-40 on the low side)? Wouldn't adding refrigerant always result in a higher low side pressure if the pump was working correctly?
My other vehicle is a 12 focus, and I've asked this question in the focus forum but there didn't seem to be a wealth of knowledge or responses to AC questions over there like there is here. I'm just not sure how to interpret my high and low pressure readings
My AC will get bone chillingly cold when it is above 90 but is mediocre below that temp and seems to cycle between vent and AC when outside temp is below 90 as well, even when set on max AC setting. It uses a constant AC pump so you only hear it engage once when turned on and the compressor clutch remains engaged at all times (there's a name for this type of compressor but I don't recall off hand). Anyway, my low side pressure never goes above 32 and the high side pressure is 220 which seems to indicate proper fill. However I have added refrigerant when I bought the car and the AC got noticeable colder but with no change in pressures or cycle time.
If my compressor were going out, would it not be able to maintain the low side pressure high enough (I think for the 90-100 degree temps we've been having it should read 35-40 on the low side)? Wouldn't adding refrigerant always result in a higher low side pressure if the pump was working correctly?