AboutDennis W Expertise I am a retired Ford master tech specializing in electrical, climate control, emissions, driveability, chassis, brakes, and any light repairs. Currently employed by an independent shop that appreciates my knowledge and abilities.
Cannot answer transmission or parts questions, these are not areas of my expertise.
Experience 32 years of auto repair, diagnosis, and emissions testing, in service staions, independent garages, and 20 years with Ford dealers.
Organizations National Street Rod Association (NSRA)
International Automotive Technicians Network (IATN)
www.blueovaltechs.com
IAMAW (retired)
National Street Rod Association
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Education/Credentials Riverside City College Automotive technology program
Ford Master Tech Certified Engine and Chassis Master (Over 500 hours)
ASE Certified in 7 categories
6 years training in Union 76 Pro-tech program
Awards and Honors 4-time Technician of the Year at Almaden Lincoln Mercury
Ford Master Tech
Union 76 Pro-tech Master tech
Question 96 E350 15 pass clubwagon, 138K miles on 5.8L v8 gas engine.
Air still blow, but not cool, just a little below the outside temp. Checked freon pressure normal. But noticed that the compressor only keep running 3-5 minutes. after than it running 5-10 seconds with 5-10 second idle, not sure if that's normal. If not, is it a compressor problem or the controller circuit problem.
Thanks for any suggestion,
Joe
Answer A vehicle ac system canhave what looks like normal pressures and still be low on freon. The only true method to know if the system is at the correct charge is to evacuate and recharge. Your van most likely has rear ac, which takes more freon than a front system alone.
Check the ac hoses, see if you have an area that is freezing up. Check the cycling switch, they will sometimes cycle too fast when failing. Normal high and low pressures depend a lot on ambient air temp and humidity. Just because the pressures look normal does not necessarily mean it is charged correctly.
