Hello, I have a problem with my Gen 3 2010 Prius model III, 29000 miles. location Los Angeles. I noticed lately the heater is blowing cool air. When I set it to about 85 or HI it feels like its blowing about 65 to 70 heat. I think this has been going on for a couple of weeks now (wife drives it). I don't have a Scan tool. What is the most likely cause? I'm thinking the thermostat is stuck open. I didn't see a write-up on how to change it or drain-refill coolant for Gen 3. Any help would be greatly appreciated. I'd like to try to fix it myself, otherwise I'll have the dealer look at it under warranty. Thanks in advance, Jc
