Question about 1988 Chevrolet Blazer
The heater/AC on my '88 S10 Chevy Blazer blows
hot/cold air well. However, when I adjust the selector to any of the AC
choices, the air only blows on the floor rather than
the dash vents.
I've checked to see that the 2 vacuum hoses are connected to the heater/AC diaphragm on the floor. Maybe the other ends aren't connected.
1. Could this be the reason that the baffles don't adjust to bring the air to the dash vents?
2. If so, is there a diagram showing their location on the other side of the firewall?
3. Is there a handy "how to" cheat sheet to disassemble/reassemble the heating/AC system if it turns out that the diaphragm is bad?
My Chilton manual is lacking any information on how to troubleshoot this problem,
Thanks a million,
working on 4 and 5 speed that the resistor that broken cold air you got to move the selector to see the motor that move the trap hot and cold sometime when the motor was not move to the hot side for a long time its jam the motor on the passager side under dash put to hot and gently tap the motor tanks pierre
Posted on Nov 09, 2008
common problem, check under dash by the gas pedal if control arms are muving went selecting from ac to heat cuz this it is the control for the vents to go from ac to heat and to defrost.
Posted on Feb 23, 2009
did you cheked if there is enough refrigrant ( freon ) in your tubes by measuring the pressure . if there is you may need to check your condensor its may be clogged and not letting enough air comes through to cool the refrigran
Posted on Jun 01, 2009
Check under your hood for broken or loose vacuum lines. Also, the pot on the hood? i believe, on that one. There should be avacuum line running to it. Looks like a little bowling ball. With your engine running , listen for a hissing.
Posted on Jun 07, 2009
HVAC control head problem or it is the air Temp Control Valve problem. THe control head is the one with the buttons and knobs and the control vavle is located on the HVAC carrier assembly underneath dashboard (two of them one on left and one on right in center). This is a job for someone who has knowledge of HVAC and electrical on a GM vehicle.
Posted on Aug 02, 2009
Tips for a great answer:
Feb 20, 2015 | 2001 Chevrolet Chevrolet Blazer
Nov 21, 2012 | 1999 Chevrolet Blazer
Oct 21, 2012 | 1996 Chevrolet Blazer
Feb 20, 2012 | 1999 Plymouth Voyager
Jan 23, 2011 | 1994 Chevrolet S-10 Blazer
Jul 03, 2010 | 2004 Ford F150
Jun 02, 2009 | 1995 Chevrolet Blazer
Jan 06, 2009 | 1996 Chevrolet S-10 Pickup
Oct 24, 2008 | 2002 Chevrolet Malibu
173 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: