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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 06-18-2015
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I am: Bryan Gehlbach
Join Date: Mar 2008
Location: Elizabeth, IN
Vehicle: 2002 Ford Ranger FX4
Drive Type: 4x4
Engine: 4.0
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02 A/C issues

On my 02 ranger the a/c is blowing hot. I took it to a friend who has a vacuum and recharging machine I pulled a vacuum on it and did a leak test, it passed with flying colors. He put gauges on it and put some refrigerant in and it started blowing cooler air but not really cold because he only had one can. So I was leaving today to go get some refrigerant at the store, got in my truck and its blowing heat.....again. I hooked the small gauge that came with my last cans and its in the red like its over pressurized. What is going on? It was perfect yesterday.

2002 Ranger FX4 - Daily driver
1989 Mustang GT - My Baby
Cracked Head Every Valve Rattles Oil Leaks Engine Ticks
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Old 06-18-2015
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I am: Ron Dean
Join Date: Jan 2014
Location: Vancouver, BC
Vehicle: 1994 Ford Ranger
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There may have been another issue if your AC suddenly start blowing warmer, if it was a gradual warming over quite a few months that would mean time to recharge, sudden change usually means a part issue.

Good read here: AGCO Automotive Repair Service - Baton Rouge, LA - Detailed Auto Topics - Automotive Air Conditioner Problems, Part II
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