A320 Excessive Hot air cabin
The other day, in cruise the FAs come in and say excessive hot air coming in the cabin, we turn the temperature down, then the indication was cold air coming in. So much heat with the trim valves in the standard positing on the panel.
Later in the flight more complaints of hot air, 36 degrees,
We turned the hot air valve of course. The problem stabilized with the Hot air valve off.
Investigating with maintenance the problem, we suspected the sensors were dirty, but found that they cleaned them 4 days before.
The engineer suspected the zone controllers ? another said it was the sensors but they cleaned them 4 days before? What could be causing this ?
Dirt in the zone controller duct?
Any thoughts from pilots and engineers ?
Thank you in advance for your help and thoughts, on this one.