My 2011 Nissan X Trail DCI's A/C & Heater control knob does not work, it was stuck when i drove so i forced it and heard a snapping sound, i know it might be broken now but where can i

SOURCE: broken temperature knob

IT SOUNDS LIKE WHEN TURNING THE KNOB IT WAS STIFF TO TURN THIS COULD BE CAUSED BY A SEIZED CABLE IF CABLE IS NOT SEIZED OPEN UP YOUR HOOD AND WHERE THE HEATER CABLE GOES THROUGH THE FIRE WALL THE CABLE SHOULD GO TO A FLAPPER WHICH IF PUSHED ONE WAY GIVES COLD AIR IF PUSHED THE OTHER WAY GIVES HOT AIR PUSH IN THE OPPOSITE DIRECTION TO WHAT IT IS NOW PUT A SMALL PAIR OF VISE GRIPS ON END OF CABLE SO IT CANT SLIP BACK TO COLD POSITION UNTIL YOU CAN GET A NEW KNOB IF CABLE IS SEIZED YOU WILL HAVE TO REPLACE CABLE+

SOURCE: Heater Fan does not work

Sounds like the fan control knob has shorted out. You can check the fan "blower" relay and fuse in the engine compartment but you need to make sure the control knob is good or you will keep blowing fuses and relays. If your blower fuse and relay are good, then just have the control knob checked and replaced if needed.

SOURCE: blow heater in car not working

Hi it is either your blower motor relay or your blower motor itself.

SOURCE: AC/Heater control valve :Lancer 2003 Misubishi

The sliding switch on the console is stuck in the cold position and the knob is pulled off. Use pliers to jiggle the switch as best you can. Feel under the center console and you probably will find the cable that is hooked up to the flapper. You'll know because when you jiggle the cold/heater switch at the upper console, the cable will move slightly. At the hookup of the cable to the flapper down under the console (passenger side) try to work the flapper loose to the open (or close) position. At the same time work the sliding switch (with pliers). The flapper will come loose and function properly. Try not to knock of the AC button like I did in the process. It flew off some where under the passenger seat. I'll find it sometime before summer. Ha.

SOURCE: 2003 mitsubishi outlander temperature control knob

The source of the problem is not the knob it is the temp blend door binding. Putting to much stress on the knob. If you replace just the control head with the knob it will only break again. You need a dampener repair kit and to install you will have to remove the dash and heater core.this will slow you to access the door that is binding. Hope this was more help then it broke replace it.