I have a 20ll CRV. About a 2 weeks ago I noticed the AC is stuck and doesn't change to heat. The passenger side works fine. I can go to AC (Cold as I want it to be) and Heat ( Hot as I want it to be. Driver side is stuck on cold. I change the temperature up and down. Doesn't work. I switch off the Dual Air and still doesn't work. My problem is I can get it to blow hot air like the passenger side. Went to a auto parts stores and the clerk suggested I pull the panel and check for loose wiring and check the relay. Relay would be easier and cost effective because I have no idea where to start with pulling the panel.