2001 GMC Safari "blend door" Questions

...blend door actuator is stuck or burnt out or actuator door is jamed locate and place remove motor actuator check if blend door move freely if not repair or disloged foring object (pencil ...

...use - which is a small electric motor to move the blend doors.  If so, the motor is probably bad.  If it uses a vac system, you have a vac leak so no vac to pull the blend door

barely cool. Ac reads a good charge, not over or under charged. What could cause this? The blend door is not fully closed for the front. GM's are bad for that. Also check the vaccuum line for the door

when I turn on the heat it blows out cold air why is that when the blower is working in the back The heater control valve may not be opening. The blend door maybe stuck. Make sure its full of water

need to know location of blend door actuator on 98 GMC Safari. behind the right side of the dash, left side of the main air duct.

...defrost blow cold, a/c blow out of defrost air condition blow cold out of defrost duct. blend air door will not change for air condition open the hood and check for leak on any plastic vacuum

...Blend Door Actuator. If you have been driving around with the Temperature knob or control set at the same spot for months, move it from fully cold to fully hot several times and wait for the air ...

...etc doesnt do anything. i know it is vacuum activated but where should i begin to diagnose The cable is probably dislocated from the knob or at the blend door actuator.The cable may also be

...back but there is no heat in the front. It is not the blower, iits working. you need to check the heater control in the dash for proper operation. also check the blend door in heater box. good

blend door acuator check To check is to turn on fan and go thru all selections,vent,floor,defrost,if not blowing thru them right then blend door is not working,here's a replacement. SAVE 20 GET 10 ...