All right. This picture was taken in cruise flight. Both Pack and Bleed switches on correct position, and Isolation valve in Auto. Set like this, each bleed supplies it's own pack, and isolation valve is closed. But something is wrong with the pressure indicator. Pressure from the right bleed valve is too low. And... The ram doors shouldn't be open. Not in cruise flight. On the other hand, the system is operating normally, and strange as it looks, it was happening on ground too. BUT, I was able to start engine number two first, just by placing the switches on the correct position, but either way, the pressure needle for the right bleed valve is always like that. it appears to me just a visual bug, because the pneumatics are operating normally. Best Regards.

Ah, yeah, didn't try other liveries or panel/aircraft configs yet, this is pmdg 800 Winglets and house colors, with default configurations.

I'm not sure if it is a bug, but those needles are different. One needle represents the Left System, and one the Right system.

Exactly, Rhen.And when the system is operating normally, and the switches are placed correctly, both needles should be close together.On the picture, the needle corresponding the right bleed pressure is too low. And the ram doors should be closed in cruise flight.But the pneumatics is operating normally.

Did you take a look at the temperatures too? b737.org.uk states

The RAM DOOR FULL OPEN lights will be illuminated on the ground and should extinguish during the climb. If they do not, then either the cabin is still very hot and the packs require full ram airflow for cooling or the heat exchanger may be faulty.

http://www.b737.org.uk/airconditioning.htm Is the heat exchanger faulty? Maybe write it in the logbook and have maint look it over before the next trip. ;) Cheers Chris

I checked the temps, all throughout the cabin is around 20º.I would consider a faulty heat exchanger, or maybe a faulty pack or something, but the failure modules/wear&tear system are off, so the plane should perform without any problems system wise.That's why I say that it's maybe just a visual glitch, because the system is operating normally.