1999 Chevrolet Silverado 2500 "heater air flow direction car" Questions

...I unhooked one heater hose and used air to check flow both directions and was clear. After you drive it 4or5 miles it will start blowing hot air. Engine temp is 200. Replace the thermostat,stuck

...heater vents. Can I access the vent door underneath the dash?vents Under neath the venting system behind console there is a venting housing that can be removed. Likely the air flow directional vent ...

...air flow through the heater core for more heat or bypasses the heater core for less heat. Vacuum actuators control the mode doors which direct air flow to the outlet ducts. The mode selector on the ...

air flowing through the heater core is not doing its job. 2- The heater core gets clogged up. 3- The valve to control amount of hot coolant flow to heater core gets stuck. Let's check if the water can

...heater will not change air flow direction. Stuck in the defrost position. What can I do to regain control of the direction of air flow? It will be a cable that will be disconnected. or broken. Youll ...

...something that may have fallen. The air flow directional is the flap or door that is inside the base of the duct system that directs the air to the area selected. heater\AC drain pipe may be

...heater it blows cold air it does not heat up. 2000 ford expedition Make sure the heater core is in the open position by using the shut off valve and turning it to open. next, you may have a ...

heater will not blow hot air. it blows cold air and fan blows. new thermostat and full radiator The heater core is possibly blocked or the temperature adjuster is not working. First check the controls

...heater air flow air just comes out of vent for the windshield even when the control is directed for the floor the mode doors for the heater system are vacuum actuated you most likely have a broken ...

...air flow either across the heater core or the AC evaporator or mixes the 2 air flows for a desired temp at the outlets, hence the name blend door, to change this part u must remove the dash