Untill about 2000, the Automatic Climate control of the 156 was terribely boring as the air conditionning was starting as soon as the temperature you had set was under the temperature in the car... and also when you started your engine.
So, a good manipulation here to make this Automatic AC less automatic
1. Put the ignition key in "STOP" position
2. Turn temperatur knob completely to the right (= max. temp)
3. Turn the blower knob to "0" position
4. Turn air direction knob to "mid direction" position (fully to the right)
5. WITHOUT STARTING THE ENGINE, turn the ignition key to "MAR"
6. Turn the blower knob AUTO-0-AUTO-0
7. Turn the ignition key back to "STOP"
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Michaël
Sorry for my English
Alfa Romeo 156 1.6 TS Pack 2000
Citroën Evasion HDi 16v 2001
Peugeot 406 Coupé 2.0 16v 1999