EggDriver

Hello! This is my first post here. I have owned and driven a '04 RX330 for over 10 years and now since she's getting older, I have had to conduct more rigorous repairs. The most recent of which will be to the cooling/heating system. It has been going out for the past 5 years, but it finally went out this season. I'm stumped on what a few of these codes means any insight is appreciated.

ok the facts:
- for the past 7 or so years every time the recirculation button is on, there is a humming noise from the passenger side where I would estimate the motors for air mix and air direction valves are

- it is set to max hot, but is blowing max cold

- when holding the auto and recirc buttons these codes popped up: (and based on this figure this is what they mean)

• 21 (I did the test inside so I expected this code)
• 24 (I haven't been able to find what this means)
• 31 (Air mix door position circuit)
• 36 (I haven't been able to find what this means)
• 41 (Air mix door position circuit OR Air mix door servomotor circuit)
• 46 (I haven't been able to find what this means)