Low and medium heater blower inoperative on 2006 toyota tacoma.

Hi do check the heater control valve and blower control module possible malfunction or faulty, Valve normally situated in engine bay . module will be found on internal heater box .

Hello! Coil of Heater Relay is supplied through Fuse "IG1 2" (10A)...Located in the Drivers Side Box...Contacts of Relay are supplied through "Heater Fuse (50A)...Located in Engine Relay Box...Blower Motor has a 2 wire connector with wire colors: Black/Yellow (Pin 2)...And White/Blue (Pin 1)...Pin 1=Ground and Pin 2=Battery when Relay pulls and contacts close...
The Blower Resistor Pack (Which fails often) controls the fan speed...BUT, there is a fuse inside the assembly...If it blows = No Fan...Located on the top of the heater/AC box and can be accessed through the Glove Compartment...Guru...Saailer

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

check the heater inlet valve. it is located in the heater inlet hose usually near the firewall in the engine compartment. It is vacuum operated but could be stuck in the open position.

what has most likely happened is that a fuse has blown that is in your blower fan circuit. Check your owners manual, and see if there is a fuse to that system, if there is, check and see if it is blown. If it isn't, then the problem could either be your blower fan itself, or your blower motor resistor. Generally, when the blower fan goes bad, no speeds of the fan work. When the Blower motor resistor goes bad, usually only 1 speed of the fan works. Try the first suggestion i gave, and it everything checks out in the fuse box, then try all of your fan speeds. If one works, you need a blower motor resistor, if none work, then it is most likely your fan. Let me know how it goes and i'll do my best to assist you further. good luck.

check the freon there are high and low pressure swithes and will prevent a/c from workin
to protect compressor

the blower resistor is bad. find the blower motor and follow the wires to the resistor, its bolted to the air box.

well it could be just a relay for the fan blower motor or a fuse. check all the fan positions..low med high..Its something you can fix but it if got about 600.00 dollars laying around .. take it to the Dealer..lol..Good Luck!!!

wiggle the wires behind the control unit to see if maybe there's a loose wire. If that does not work, then try tapping the climate control switch, if it works then you know it's your switch that needs to be replaced. If you want to fix it yourself, just take it out and dissasemble it and clean the unit with alcohol or nail polish remover and try it again on the part (knob) that makes contact with the board. a new unit is very expensive.

That resistor usually doesn't go as quickly in just five years, although, it is possible. I would salso have the blower switch and wiring to it checked. Thanks, Dana

Either the blower went bad or the heater relay went bad. This does not sound like a heater core problem unless you where smelling a SWEET smell when it was running.