Question about 1999 GMC Suburban
The air coming through is the outside temperature
Here is what I know:
The ac is properly turned on - at least the switches are engaged and lit.
there is pressure in the system
I have topped off the 134a coolant with a kit from an auto parts store. It was not completely empty.
the compessor is turning and the clutch is turning- although the clutch stops and restarts occasionaly
all the fuses are ok
Thanks in advance fro your help.
Is 1 of the 2 AC (under the hood) lines cold? if so you may have a blend door problem, that door is in the dash air duct distribution system, it mixes are between the hot heater core and the cold AC evaporater core to give the set or desired air outlet temp, When you turn the defrost on does it blow hot/cold as the lever is moved back and forth? The compressor turning off and on is normal cycling of the system, when it reaches a preset pressure in the low side line, a pressure switch will open and compressor will "cycle off" when the press starts to rise to a preset limit the compressor will "cycle on" and so on. I assume you have an electric bled door, older cars and trucks use a cable operated mechanical door.
Posted on Jul 25, 2008
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
May 16, 2017 | Lexus Cars & Trucks
Dec 04, 2015 | Cars & Trucks
Dec 10, 2014 | 2007 Cadillac Escalade Ext
Aug 29, 2011 | 1998 Honda Civic
Aug 10, 2010 | 2002 GMC Envoy
Dec 29, 2009 | 2007 Chevrolet Malibu Maxx LTZ Hatchback
Aug 24, 2009 | 2000 Volkswagen Beetle
Apr 20, 2009 | 2001 GMC Sierra C/K3500
Nov 18, 2008 | 2001 Volkswagen Jetta TDI
Aug 31, 2008 | 1999 Oldsmobile Silhouette
606 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: