Model: D20 Pickup
Engine Size: 2.4L
Refrigerant Type: 134a
Ambient Temp: 87
Pressure Low: 120
Pressure High: ?
Hi all, Looking for a little help, hoping for good news, ready for not finding it...
Any ideas why the low pressure is that high when the outside temp is only about 87? I had figured the system had just developed a leak and I was going to be lazy and just top it off with a small can to see if it made a difference, but I decided to check the pressure first and wasn't expecting to see it be high like that.
I thought I had some old 134 gauges around, but couldn't find them. So, all I've got handy is one of the interDyamic gauges that attach to a can, so don't have the high side reading. The "low" side is an approximation due to just eyeballing the gap between 100 and 150 lbs on the cheap retail "gauge".
Is it possible that a low liquid level could cause the low side to be that pressure (about 120ish) ? This was taken at idle, engine at temp after 20 min. drive home from work, A/C turned on, high fan, low temp setting, compressor was turning, both tubes quite warm to the touch, but not really HOT. There was a little bit of cool air when I started home, but gradually became hot so I turned it off until I got home.
This little pickup has beeng going great for a long time now, but just the last couple of days (literally - 2 days) the A/C quit working.
It's been quite a while since I've needed to work on an A/C, and I've had lots of many reasons to forget whatever I was lucky enough to have picked up, so...
120 low side with the compressor engaged suggests the compressor is bad, it turns but it won't pump. In that case there would be a similar reading on the high side, basically nothing is moving in the system. You need to use proper gauges to confirm the diagnosis.
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