My heater and A/C just started doing this. They both work, A/C gets cold heat gets hot, but no matter what it won't blow any harder than at the first setting. I checked the fuses and there's nothing wrong with them. But ocassionally the blower starts working again. Should I check the connection to my blower motor or is it dying and I should get a replacement.

 

It could be the switch.

 

Duke,

Check the blower resistor. You may have poor connections or broken resistor coils. It's easy to remove and inspect:



Even if the resistor is bad, the blower should still run on the highest speed, as long as the relay is operating correctly.

 

Wow, thanks for the diagram. I'll check it out tomorrow when I have time.