my heater wont turn on, what can I check ?

where are fuses located ?

there are 3 common places in cab fuses are located. 1) when you open your drivers door, if there is a portion of dashboad that sticks out paralel to the door when it is CLOSED there can be a fuse pannel there. 2)Under the dash on the driver side in the vicinity of your brake pedal.3) Some time OE manufature will put a fuse box behind the glove box as well. Now with all of that being said, i would consult the owners manual for the exact fuses box location in the cab and under the hood BEFORE i start pulling on body pannels and glove boxes.

both , no heat and it wont come out vents.