blower motor

Replaced the automatic climate control. The unit worked fine for a bit and then the blower motor stopped working. Replaced the blower motor and it worked fine again for a couple days. Blower motor stopped working after a couple days. Auto climate control unit appears to function the way it...

Blower not working. Any hints on what could be causing this beside bad blower motor? How would I test for a bad resistor?

98 Tahoe blower motor blows only on high speed but ONLY with the switch in the off or low position. Sometimes it won't come on at all. I've already replaced the resister. The next logical explanation would be the control module, right? I don't see how it could be the motor itself since it's...