Monaro Climate Control Problems

[Yanayaya]

Hey everyone, I'm having some problems with my climate control on my Monaro. For some reason it won't switch modes, it stays locked on the window mode. Nothing has changed it just started this the other day and I'm lost as to why. All the plugs and wires all look nice and fresh with no splits or anything.

I can hear the unit behind the glovebox click when I press the mode button but nothing happens.

Anyone had this problem before.

[Mud_]

Just guessing, but check the vacuum lines haven't come unplugged - they're near the middle of the bulkhead, where the coolant lines go through to the heater core.

[mfp4073]

Not much help, but I wonder if there is some kind of reset procedure that will sort it out.
If the vacuume lines are OK, I'm thinking relays or maybe even a stuck flap!!!