My climate either blows outside air (no AC) or full heat. No control between the two unless I mess about with the blower position buttons. Or it goes to full heat if I hit a bump in the road.

Any ideas on what to do/ who to see about it? Local mechanic has said he doesn't want anything to do with heaters :./

If you have climate control it will be the end of the flap valve that's come loose from it's control motor.

There is a thread about the problem and it's fix in a 100HP.