The climate control switch for the fan will not come on, the first problem was the high speed on the fan quit working now all fan speeds do not work. 2005 chevy silverado v-6 no rear window defroster. where can i find a climate control switch for this vehicle . the model# is 10370033 serial # 2140-DDES
Check the relais module located inside under the rh side of the heather box you can see the connector most of them need to be replaced as they burn out you may need to replace the blower motor as well,high amp draw caused by faulty bearings will overload the blower motor controller
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the heater works from hot coolant flowing through it so if it stopped working but was working recently , the problem will be in the heater control tap not turning on ( control module )
the blower works of electrical and trying to blow air indicates a problem in the fan speed control ( again a control module module)
if you have a climate control system in the car It may be the climate control module that is faulty as it controls both
Almost sounds like your climate control switch is bad as it controls everything including the switching and blower speed with the exception of the blower speed being a blower resistor issue (allows multiple speeds).
When the blower works only on the high setting its usually a bad blower resistor which is right near the blower motor. now you say it would always blow high regardless of the fan speed setting that would indicate probably the climate control unit or a connector problem somewhere. finally it not working at all may be the climate control unit or connection went bad even further. it might have a blown fuse or a bad blower motor in addition to the climate control unit or connector problem .check for power and ground at the blower motor. the power is supplied from fuses and may have a relay also. the ground is supplied from the climate control unit and goes through the resistor to control the fan speed. good luck
I replaced the fan module under the glovebox on my 2005 Town & Country last night. Mine would not shut off at all with key on. It only blew on high no matter where I set the switch. Mine also had the climate control which makes a difference. If it is not the auto climate control it is usually the blower resistor if the other fan speed selections don't blow at all except on high.
There is a resistor switch that controls the fan speeds. When it shorts out it defaults to high speed only. It is not too expensive and is not very hard to replace. It is located adjacent to the blower and has an electrical hook up to it.
If it is manual climate control.
You have a bad blower motor resistor. To replace it remove the lower dash panel cover below the glove box and it will mount in the heater housing with 2 screws. It will have a 4 wire connector with the wire colors being OG/BK,LG/WH, YE/RD, BK If it is electronic climate control then you would have to replace the blower speed controller which is also located in the same place.