The rear AC on my 2005 Pilot wasn't working. I read through this forum and others and found that a resistor usually burns out when a filter on the bottom of the center console by the driver's right foot gets clogged. I ordered a 3rd Party replacement from Amazon for $19.99. It took me like 5 minutes to replace it. I have attached a link to a YouTube Video from someone else that shows how to replace it.