Heater blower switch does not

Do you have power to the switch? Do you have power to the fuses? They may not be blown but they may also not have power. Not a likely scenario but possible. First look for power to the switch. No power trace to fuses. Next check if switch is getting power doe switch send power. Does blower motor receive power after you verified that switch has power. Is the switch from the dealer or a/m? Try these things first. If the switch is used than the switch is probably bad. Also there is a resistor on the blower motor that can go bad and that could be the problem.