I'm having problems with my climate control system.Problem 1- Last summer the blowers would run but air wouldn't blow out the vents. If I changed modes the blend doors would move but air still would not blow out the vents.Both blowers are running at all speeds.Problem 2- This winter I started the engine and let it warm up, after reaching normal operating temp the auto blowers did NOT start running and they haven't run since. The fuses are all OK. Does anyone have some good troubleshooting charts for this system? Thanks, Mike