First time poster here and was wondering if you gents could help me out. 2000 Acura TL 200,000k, heater blower is not working. It seems to work fine when I start the car up cold and then it goes out after any amount of time(varying). Also at different times it has put off a really weak flow. Replaced the blower resistor and now it doesn't even seem to try to come on at all. With the old resistor you could hear a faint noise like it was trying to spin the motor but with the new resistor there is nothing. Ive checked all fuses and the harness to the motor looks clean. Thanks! MKV

 

There's a recent thread about the blower motor.

But more than likely you'll need to replace your blower motor on top of the Power Transistor.

I recently did mine, and replaced the blower motor sub harness along with the transistor and motor. I would recommend doing that as well.

 

ck the harness connector just under the glove box door, that likes to fail and take out the resistor and motor too! Have to look inside and on back of connections

if you get fan speed but low air flow and the filters are new, ck the thread on mix motor
See DIY section for more ideas