A/C not cool enough after compressor kit replacement
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Junior Member
Joined: Dec 2014
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From: Dallas, Tx.
A/C not cool enough after compressor kit replacement
Hello All,
A while ago, my A/C compressor locked up and I replaced it with a UAC kit (compressor, condenser, drier and expansion valve). I have the Mazda Service Manual and I replaced the components as dictated by the procedures in the manual. A/C lines were flushed and blown dry, new seals installed, AC oil came in the correct amount in the new compressor, and system evacuated to 28mmHG and charged to 24PSI Low, 250PSI High (near 100F degree temps) at 1500 RPM. As far as I can tell the 22PSI is about 95F degrees per the manual and I was definitely hotter than that. Hard to read the graph in the manual, but graph goes higher than 22 at near 100F degree temps.
Problem is,I can only get about 70F degrees at the AC ventilation ports. All temps, etc. taken while car is in the driveway with the radiator fan running.
Driving it, I can get the AC vent temp down to about 65, but no more.
I am thinking that one of the new components is faulty and leaning towards either the compressor or expansion valve.
Anyone experience something like this or have an idea of where to look for the issue?
Thanks in advance.
Car is 2006 Mazda3 S 2.3L A/T
A while ago, my A/C compressor locked up and I replaced it with a UAC kit (compressor, condenser, drier and expansion valve). I have the Mazda Service Manual and I replaced the components as dictated by the procedures in the manual. A/C lines were flushed and blown dry, new seals installed, AC oil came in the correct amount in the new compressor, and system evacuated to 28mmHG and charged to 24PSI Low, 250PSI High (near 100F degree temps) at 1500 RPM. As far as I can tell the 22PSI is about 95F degrees per the manual and I was definitely hotter than that. Hard to read the graph in the manual, but graph goes higher than 22 at near 100F degree temps.
Problem is,I can only get about 70F degrees at the AC ventilation ports. All temps, etc. taken while car is in the driveway with the radiator fan running.
Driving it, I can get the AC vent temp down to about 65, but no more.
I am thinking that one of the new components is faulty and leaning towards either the compressor or expansion valve.
Anyone experience something like this or have an idea of where to look for the issue?
Thanks in advance.
Car is 2006 Mazda3 S 2.3L A/T
Last edited by mizzleman; Jul 1, 2024 at 10:53 PM.
Thread Starter
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Junior Member
Joined: Dec 2014
Posts: 2
Likes: 0
From: Dallas, Tx.
Unfortunately, I do not have a scale or any other way to measure the refrigerant charge. I did this work ago and don't remember the rough amount of 12 oz cans I used.
I was going under the assumption that if the high and low pressures were within specification, then the refrigerant is in range.
Lately, I've been entertaining the idea that, if there is a problem, the pressures could still be in range but not have the correct amount of refrigerant.
I do not have a recovery/restore machine. So I may find someone and have them recover the refrigerant and find out much is in the system and go from there.
I was going under the assumption that if the high and low pressures were within specification, then the refrigerant is in range.
Lately, I've been entertaining the idea that, if there is a problem, the pressures could still be in range but not have the correct amount of refrigerant.
I do not have a recovery/restore machine. So I may find someone and have them recover the refrigerant and find out much is in the system and go from there.
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