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Old Aug 9, 2022 | 07:10 PM
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fedspunisher's Avatar
fedspunisher
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Slow Cooling

So, the last week or so the AC in my 2004 Excursion has seems weak and at times slow to start cooling. It was 90 out on Friday and I had front and rear ac on max temp turned down as cold as it would go and even by the time we got to our destination, 30 minutes later, it was still not what I would call comfortable in the vehicle. Then on Sunday it was in the mid 80's and it took a good 5 minutes of driving before the air coming out of the vent even felt cool.

I hooked up the gauges this evening and here is what I saw. 90 degrees 42% humidity.

After idling for a couple minutes.
LOW 45 HIGH 395

1500rpm
LOW 30 HIGH 300

2000rpm
LOW 40 HIGH 360

1500rpm
LOW 50 HIGH 250

Static
105

Everything was brand new spring 2021. Would too much oil in the system cause these symptoms?
 
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Old Aug 9, 2022 | 07:40 PM
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Check your engine cooling fan, make sure the condenser is clean.

Symptoms suggest insufficient heat rejection.

 
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Old Aug 10, 2022 | 10:42 AM
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fedspunisher
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Originally Posted by projectSHO89
Check your engine cooling fan, make sure the condenser is clean.

Symptoms suggest insufficient heat rejection.
I checked the evaporator and it looks clean.

A few bugs in the condenser so I will hose that down tonight.

I do not know if the fan is the issue since I was running 60mph on the 30 minute trip?

Any good way to DIY diagnose?
 
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