AC get warm when not moving
07-12-2019, 02:37 AM
#12
It's obviously still relevant for the thousands with these trucks since it was a first Google search result and this post is apparently full of misinformation.
I literally just hopped into a 130k bone stock 2008 5.4L today, total strangers too as a matter of fact lol. I Have to get to the bottom of this problem. AND his was ice friggin cold as long as I wanted to sit there with it running. Same exact setup as my truck, no electric fan added.. This is AZ it's 114 today. Ford wouldn't sell a single truck in most of AZ if someone hopped in for a test drive and experienced that so don't tell me it's all due to a design problem, every truck would be that way if it was. I feel virtually the same amount of airflow at idle on the Ford as my 1999 suburban. Actually any vehicles fan is spinning at the same rate at idle regardless as long as the clutch is locked up. Find me a newer post with better information and don't bash someone for bringing up a still relevant problem people are facing without taking shortcuts to fix it.
I literally just hopped into a 130k bone stock 2008 5.4L today, total strangers too as a matter of fact lol. I Have to get to the bottom of this problem. AND his was ice friggin cold as long as I wanted to sit there with it running. Same exact setup as my truck, no electric fan added.. This is AZ it's 114 today. Ford wouldn't sell a single truck in most of AZ if someone hopped in for a test drive and experienced that so don't tell me it's all due to a design problem, every truck would be that way if it was. I feel virtually the same amount of airflow at idle on the Ford as my 1999 suburban. Actually any vehicles fan is spinning at the same rate at idle regardless as long as the clutch is locked up. Find me a newer post with better information and don't bash someone for bringing up a still relevant problem people are facing without taking shortcuts to fix it.
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nathan3306 (07-23-2019)
07-16-2019, 08:59 PM
#13
Senior Member
Assuming the system is working properly and the charge level is correct, lack of airflow through the condenser is the culprit. My Son's '05 (previously my truck) was experiencing poor A/C performance at idle in traffic (hot days of course). We installed a 12" Flex-a-Lite pusher fan in front of the condenser and triggered it from the compressor wire, via a relay. A/C performance at idle is markedly improved now.
07-22-2019, 08:56 PM
#14
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I have a question for the OP. Have you disabled any of your CEL functionality? I do know if you have an issue with your Cylinder Head Temperature sensor (CHT), the PCM will disable some systems (inlcuding the A/C). I had a bad cable on mine and everytime I stopped, the vibration in the act of stopping would cause the issue and the A/C would turn warm... Just saying, it may be something like that and if you aren't seeing a CEL b/c it's disabled - then you'd probably never know... My A/C blows COLD at idle...
I need to check my engine wire harness very closely for about the same issue.
Thank you for giving me the good starting point.
07-22-2019, 10:30 PM
#15
Senior Member
It's obviously still relevant for the thousands with these trucks since it was a first Google search result and this post is apparently full of misinformation.
I literally just hopped into a 130k bone stock 2008 5.4L today, total strangers too as a matter of fact lol. I Have to get to the bottom of this problem. AND his was ice friggin cold as long as I wanted to sit there with it running. Same exact setup as my truck, no electric fan added.. This is AZ it's 114 today. Ford wouldn't sell a single truck in most of AZ if someone hopped in for a test drive and experienced that so don't tell me it's all due to a design problem, every truck would be that way if it was. I feel virtually the same amount of airflow at idle on the Ford as my 1999 suburban. Actually any vehicles fan is spinning at the same rate at idle regardless as long as the clutch is locked up. Find me a newer post with better information and don't bash someone for bringing up a still relevant problem people are facing without taking shortcuts to fix it.
I literally just hopped into a 130k bone stock 2008 5.4L today, total strangers too as a matter of fact lol. I Have to get to the bottom of this problem. AND his was ice friggin cold as long as I wanted to sit there with it running. Same exact setup as my truck, no electric fan added.. This is AZ it's 114 today. Ford wouldn't sell a single truck in most of AZ if someone hopped in for a test drive and experienced that so don't tell me it's all due to a design problem, every truck would be that way if it was. I feel virtually the same amount of airflow at idle on the Ford as my 1999 suburban. Actually any vehicles fan is spinning at the same rate at idle regardless as long as the clutch is locked up. Find me a newer post with better information and don't bash someone for bringing up a still relevant problem people are facing without taking shortcuts to fix it.
Might want to work on both your stunning personality and your information processing skills....
One common contributor to this is a bad fan clutch, an efan swap eliminates the issue.
07-13-2020, 01:25 AM
#16
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Hi Perry b-
how did you mount the 12” fan? Any issues with blocking airflow to radiator (some people mentioned that as an issue in another forum but I am not sure why it would)?
how did you mount the 12” fan? Any issues with blocking airflow to radiator (some people mentioned that as an issue in another forum but I am not sure why it would)?
Assuming the system is working properly and the charge level is correct, lack of airflow through the condenser is the culprit. My Son's '05 (previously my truck) was experiencing poor A/C performance at idle in traffic (hot days of course). We installed a 12" Flex-a-Lite pusher fan in front of the condenser and triggered it from the compressor wire, via a relay. A/C performance at idle is markedly improved now.