02 s type 4.0 AC temp at idle isn't good
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Junior Member
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From: GA
02 s type 4.0 AC temp at idle isn't good
Recently I replaced the condensor compressor and dryer (4 seasons) after determining the compressor failed. Evac and recharged system and all seemed to be working great.
This is my wife's daily driver. She told the air gets warm when she comes to a stop. She's right as always.
I read the climate control system posted here and went through the testing to see if the dccv was working properly and seams to be. I use both a temp gun and my hvac multi meter that has a temp prob to check the blowing temps out of all the vents in the dash
Car is fully warmed up and set to Low and dash vents.
My car ext temp reads 86 in the am , I rev up to 1500 rpm and ac blowing temps are upper 50s. I rev 2000 rpm and goes down a little more to mid 50s. This is really good
At idle 600 + rpm and blowing temps creep to 80s. Passenger vents a little higher.
the car has an electric fan only and I'm wondering how to check it. I see it turning but dont know if it adjust speeds for coolant temps and ac commands.
I also realize it may need a little more freon but I want to know if the fan is variable speed.
Any and all suggestions are greatly appreciated.
This is my wife's daily driver. She told the air gets warm when she comes to a stop. She's right as always.
I read the climate control system posted here and went through the testing to see if the dccv was working properly and seams to be. I use both a temp gun and my hvac multi meter that has a temp prob to check the blowing temps out of all the vents in the dash
Car is fully warmed up and set to Low and dash vents.
My car ext temp reads 86 in the am , I rev up to 1500 rpm and ac blowing temps are upper 50s. I rev 2000 rpm and goes down a little more to mid 50s. This is really good
At idle 600 + rpm and blowing temps creep to 80s. Passenger vents a little higher.
the car has an electric fan only and I'm wondering how to check it. I see it turning but dont know if it adjust speeds for coolant temps and ac commands.
I also realize it may need a little more freon but I want to know if the fan is variable speed.
Any and all suggestions are greatly appreciated.
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Joined: Oct 2012
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From: Oregon
No, you should see much cooler than that. When everything is perfect, you should see around 38F. At idle, when not moving, the temp might creep up to about 45F max. The mid 50s is too high.
How long has it been since you did all that work? I wonder if you've lost some refrigerant since then. Maybe one of the new connections isn't sealing properly.
Do you have a refrigerant sniffer? Mine set me back about $25 on Amazon, IIRC. It works great for finding leaks.
As far as the fan operation, here's an easy method to check. And yes, the fan is variable speed. Find a deserted road where you can drive at approximately 30-40 MPH for a few minutes. You want to find the sweet spot where the engine is close to idle speed but you have good forward velocity to ensure plenty of ram airflow through the condenser. If AC performance is now good at idle RPM, you'd know the fan is not drawing enough air through the condenser when the car is stationary.
Last edited by kr98664; Jun 20, 2018 at 02:19 PM.
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Junior Member
Joined: Dec 2016
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From: GA
A month or so since the repair.
Great idea for checking the fan air flow. I can hear a slight increase when the ac is turned on along with the ac clutch engaging.
I've never really researched what the air temps blowing are before but I tested my other vehicles and your right at idle it's upper 40 and drops when driving and higher rpms.
Gonna check the pressures and look for leaks. This thing isn't real clean underneath yet.
Thanks
Great idea for checking the fan air flow. I can hear a slight increase when the ac is turned on along with the ac clutch engaging.
I've never really researched what the air temps blowing are before but I tested my other vehicles and your right at idle it's upper 40 and drops when driving and higher rpms.
Gonna check the pressures and look for leaks. This thing isn't real clean underneath yet.
Thanks
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Joined: May 2009
Posts: 12,134
Likes: 3,383
From: home
Just a comment on finding leaks?
Our Jaguars come with UV dye in the refrigerant from the factory.
This means a small black light flashlight will show up leaks anywhere the oil is. Won't find leaks hidden from view but it's cheap and quick for a lot of under hood connections.
I have one of these in addition to a sniffer as Karl said they are also pretty cheap these days.
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Our Jaguars come with UV dye in the refrigerant from the factory.
This means a small black light flashlight will show up leaks anywhere the oil is. Won't find leaks hidden from view but it's cheap and quick for a lot of under hood connections.
I have one of these in addition to a sniffer as Karl said they are also pretty cheap these days.
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.
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