My 2000 X-reg doesn't have working aircon, but the heating does work after a fashion. Yesterday, we were off on a 30-mile trip and, in the sunshine, we were getting too warm, even with the heater fan off. Pressing the buttons until both sides were indicating LO made no difference. As I predicted, after making our visit and restarting the car, the heater was producing only cold air. However, the sun had gone in and resetting to HI provided heat to the passenger but not the driver. This has happened before! I suspect that next time I drive it, there will be heat both sides, as occurred on a previous occasion. It seems to be predictably unpredictable! I'm sure some of you know why. We've had it a year now and in the summer I just left the heater on LO. Otherwise I've generally left it on 23 and controlled it on the fan. It works as regards change the settings from screen to face-level to feet etc. Clearly the blender motors work, but not when I want them too. Any suggestions?

There's 3 blend motors, one for each side and one for air distribution so it sounds like you have one or more intermittent blend motor. Pulling the HEVAC out and giving the blend motor connector a dose of contact cleaner might work. When you first start the car the blend motors are driven from one end of their travel to the other to check for a feedback signal. If the HEVAC doesn't see that signal, it won't try to move that particular blend motor again, or at least not unless it passes the self test on the next start. With working blend motors but non-functioning AC, putting it on Lo will give you air at ambient temperature.

Thanks! How easy is it to 'pull the HEVAC out'?

Remove both centre console side panels (2 screws in each, if they are both still there), lever outwards at the back and slide down and back. Undo the 4 screws that hold the HEVAC in place, tilt it out at the top then pull. Black plug on the left side is the one to the blend motors.

Thanks. I'll have a look at that.