Under the hood on the firewall you will see a thin plastic white or black vacuum line, it connects to the engine and that line controls the zones, if it breaks or comes loose the defrost will stay on no matter what you select.
SOURCE: Heat and AC vent problem.
most likley you have a vaccume leak somewhere but also the linkage to the door that that directs the air flow may be in a bind. another possability is the hvac controlls. hope this helps
SOURCE: why does the ac on my 2003 ford f150 blow through the defroster
Most likely it is a vacuum problem. That's what controls the air flow flaps.
SOURCE: where is the LP to charge the AC on a 2003 ford
i dont know what a lp is ,,,but the low side service port is on the largee ac line ,it is the smaller of two that u service the ac,follow the large line/hose untill u come to the small service port this is the one
SOURCE: 2003 ford explorer has no heat
does the fan in the cab work?? if it does SOUNDS LIKE YOU MAY HAVE AIR BLOCK, OR BLOCKED HEATER MATRIX, FIRST CHECK THE HEIGHT OF THE HEATER MATRIX IN THE CAB , IF ITS HIGHER THAN THE FILLER/EXPANSION TANK. THEN COULD BE AN AIR LOCK, LOOK FOR THE HIGHEST PIPE AND SEE IF THERE IS A BLEED VALVE, IF NOT TAKE BOTH PIPES OFF THE MATRIX FEEDS (TWO PIPES GOING FROM ENGINE BAY TO INSIDE OF CAR, AND FLUSH OUT WITH HOSE TO SEE IF IT IS BLOCKED, AND RECONNECT LOWEST PIPE FIRST AND FILL SYSTYM TILL WATER APPEAR FROM TOP AND RECONNECT RUN MOTOR, AND KEEP TOPIN UP, YOU CAN BuY A COOLENT FLUSH SOLUTION TO CLEAN THE SYSTYM OUT
SOURCE: 2003 ford explorer ac compressor does not come on.
It is probably either a bad compressor clutch or the system has lost its fluid and the low pressure switch is keeping it from coming on. If you track the AC lines on one of them you will see a sensor with a plug connected to it. Start the car turn the AC to max, blower also. Then unplug the connector on the pressure switch and jump the wires in the connector. Use a flat head screwdriver if the connector has exposed pins or a paperclip if the pins are inside little tubes. If you do this and the compressor kicks on then you have lost your refrigerant and have to bring it to be leak tested. If it doesn't come on then it is probably the AC compressor clutch.
219 views
Usually answered in minutes!
×