Beause there is probably a short/bad connection in the switch, or the blower motor itself
A short somewhere in the wiring, an incorrectly installed bulb, damaged horn ring assembly, etc.
IF IT has a pick-up in the Distributor.IF not t could B a Crank sensor.
The blazer must be in park for the rear hatch button to work. If you have the blazer in drive the button will not open the hatch unless it is in park!!! If there is still a problem maybe try checking the fuses! The actuator could be broken in the rear that releases the window so you can open the back. This happened to my 2003 Blazer and my neighbor's 2002 Blazer. By removing the back panel (high likelyhood the panel will break when you remove it) and replacing the actuator that could solve your problem. Both I and my neighbor would have had to order the whole actuator in order to replace the tiny plastic piece that broke. Instead we drilled a whole and rigged it with some tough wire. Works now but we both have broken back panels...even the dealership broke one. Good luck. SEE RELATED LINK for 1997 Blazer
not usually!!if fuse is blowing out check for short!!
Wet the dust. It will blow when it dries again, but if it is a dusty dirt road, building an asphalt road would prevent the dust blowing. Or if it is ground, planting vegetation such as grass would reduce the levels of dust.
The compressor is coming on because you have the heater set to defrost. Take it off defrost and the compressor will not come on. I would suspect the compressor is locked up.
That would be fusible for older models
Is it blowing cold air only or not blowing any air at all.
it is a heater. heat. it blows heat. warm air
heater core???
Low coolant in the system. Defective heater control valve. Clogged heater core.
Check bulbs, fuses, and check for wiring problems
Are you blowing fuses or are the bulbs blowing? Blowing fuses would be a sign of any wires or metal contacts in your brake circuit grounding out or shorting on themselves. You'll have to check all of the wiring in your brake light/switch circuit to be sure.
The fan motor has a short...change it.
It being an American vehicle
check the switches and the motor
Your electric unit can blow fuses during the winter when you are running your heater for several reasons. The main reason would be that you have a faulty ground on your heater.