More than likely it's a vacuum problem, look for connections whether off or hoses that need to be replaced
I had the same problem there is alot of sonnection wires behind the thermostat and air conditioning switch you take it off and reconnect the wires if that dont wwork you need a speed control box!
681 views
Usually answered in minutes!
i have the same problem tho mine goes back and forth between middle vents and windshield vents
×