Question about 2002 Chevrolet TrailBlazer
The ambient air temperature sensor is bad or has a connection/wiring problem. It is not blowing cold air because it thinks the outside air is less then 35degrees. When the computer sees outside air less than 35 it disables AC so that ice will not form inside the vehicle and in HVAC system. The sensor is directly behind the front grill. You might be able to check it for connection/corrosion/frayed or damaged wires. If no evidence of this I would replace it.
Posted on Aug 16, 2008
A 6ya expert 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 repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Inspect vacuum hoses for splits, kinks, and proper connections, as shown on Vehicle Emission Control Information label. Inspect thoroughly for any type of leak or restriction.
Inspect the air intake ducts for being collapsed, damaged areas, looseness, improper installation, or leaking, especially between the mass air flow (MAF) sensor and the throttle body.
Inspect for air leaks at throttle body mounting area, mass air flow (MAF) sensor and intake manifold sealing surfaces.
Inspect the wiring harness for poor connections, pinches, cuts, or other damage.
Inspect for loose, damaged, or missing sensors and/or components.
Really need to check sensor PID'S with a scan tool, An maybe a scope too ! PID'S are parameter identification . All the sensors operate within a set voltage parameter , like the coolant temp. sensor an if it's off it can affect fuel delivery !
Mar 15, 2015 | 2003 Chevrolet TrailBlazer
Dec 15, 2013 | 2011 Dodge Charger
May 20, 2013 | 2001 Chrysler Town & Country
Jan 10, 2012 | 2003 Hummer H2
Jul 09, 2011 | 1999 Chevrolet S-10 Pickup
Nov 09, 2017 | 2002 Chevrolet TrailBlazer
Jul 17, 2010 | 2000 Pontiac Grand Prix
Jun 15, 2010 | 2002 Chevrolet TrailBlazer
Oct 06, 2017 | 2002 Chevrolet TrailBlazer
May 01, 2009 | 2001 Audi A4
437 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: