I have a 2002 suburban, it has regular heater /ac controls, want climate control.

SOURCE: 2002 suburban wont switch from vent to any other

It sounds like the mode actuator is defective. It is what changes the different modes, floof,vent,defroster.

SOURCE: 2003 Trailblazer No air from front face vents

first check to see if you have power going to the actuators when you switch the switch to it location if no power replace controller if you have power and no movement from actuators replace actuator. if actuators move remove hvac box and check for broken blend doors.

SOURCE: 2002 suburban a/c blows only from floor vents

Most cars have dampers/diverters that are cable or electric actuated. Older cars may be vacuum operated. Not sure what actuates in your Suburban. Either the selector switch is not switching or the cable is loose or broken. You could check fuses but I'm not sure you'll find any. Not easy to troubleshoot.

Colin Stickland

• 22516 Answers
• Posted on Jan 07, 2011

SOURCE: my 1999 Chevy Silverado climate

the most common cause are the rubber pipes that feed the operating flaps with a vacumn ,they perish and split on the ends ,as all the control flaps are not working by the description then i would start looking at the pipes for deterioration ,starting at the inlet manifold and working back .Some vehicles use a vacumn resevoir at teh back of the engine on the firewall area ,so a pipe comes from the manifold to teh resevoir then another pipe runs down to teh bottom of the firewall area in line with the heater unit then connect to a plastic tube which goes through the firewall to the heater box then its taken off from their with another pipe to the operating control ,this is where i would expect to find the problem from the engine/resevoir/control switch