Earlier this winter, I noticed a loud noise from a blowing fan every time I turned on the heater. I was worried it will cost a fortune to replace if I take it to the dealer or an auto shop. I ignored it for a while, but the noise was getting louder and screechy, especially when the weather was freezing.
I can still live with the noise, but I also noticed the air was not blowing out as much. I did some Googling and came across a YouTube video showing how to replace the blower motor, which located underneath the glove compartment. All I had to do was unscrew three screws to replace it. The process took less than five minutes.
I ordered a brand new Genuine Toyota (87103-0C051) Blower Motor Sub-Assembly on Amazon for $125. Now the noise is gone and the fan is blowing out more air than before.