I bought this van last spring and the blower motor never worked so I recently replaced it about a month back and everything was working great. Weird part is when I cut the ends off the old blower motor and touched them to the battery the motor worked perfectly. We had our first snowfall and real temp drop 2 days ago and the blower motor would not work at all. However once the car drove for awhile it would turn on and start working. Every now and then it would do something weird where it would slightly blow air like the setting was turned down but then it would start blowing normally. Yesterday the same thing happened where the blower motor would not work at all until the car was driven for about 30 minutes. I am at a loss as the blower motor was just replaced. Its not the resistor so im at a loss on whats causing this.

Thanks in advance!