View Single Post
Old 12-27-2016, 06:42 PM   #4
AF Enthusiast
brcidd's Avatar
Join Date: Jul 2005
Location: troy, Ohio
Posts: 2,253
Thanks: 2
Thanked 162 Times in 160 Posts
Re: 01 Chevy Venture Cooling Fans & AC Not Working

No codes are ever set for low refrigerant pressure- refrigerant pressure changes with temperature- so if it is below freezing out- there is low refrigerant pressure, and you would not want a code for something that happens every time ambient drops below freezing. If fan(s) work with engine temp, they should work with a/c if and only if a/c needs them- if no a/c pressure, or low a/c pressure, then fans do not come on- simple as that- you don't need the fans when running highway speeds- so that is why they let the a/c head pressure determine the need for the fans.....
Automotive A/C Engineer with:
'99 IH 4700 Toy Hauler
(2) '95 GEO Prizms both maroon
'99 GMC Yukon
'95 Chev 3500, 454 Dually Crew Cab- 145k miles-
Wife's Camel trailer puller.
'94 Astro- 370k miles
'94 Firebird Formula- 5.7L 180k miles- gone-
'92 Chevy Lumina Van 3.8L 264k
'86 GMC S-15 - 2.8L 154k
'87 Buick Park Ave . 187k
'86 Buick Park Ave 3.8L 199k miles- gone
'77 Chevy Vega- 2.5L 175k miles gone but not forgotten
'68 Camaro 396 4 spd RS/SS -72k miles-
brcidd is offline   Reply With Quote