Auto Air Conditioning & Heater Repair: climate control switch, monte carlo z34, 1998 monte carlo z34

Question
1998 Monte Carlo Z34 3.8
Climate control switch is not functioning. It is stuck at defrost and Floor. I can here the vacuum switch switching out when using the select switch. For each position the vacuum control switch is making a clicking sound for each position. It appears there is no vacuum pull at the switch

Answer
YOU`RE GOING TO HAVE TO LOCATE THE MAIN VACCUM LINE THAT FEEDS THE CONTROL PANEL.THE MAIN VACCUM LINE MUST COME FROM THE ENGINE AND THRU THE FIREWALL.THE LINE IS USUALLY MADE OF PLASTIC WHICH SPLITS AND CRACKS APART FROM AGE AND ENGINE HEAT.

GOOD LUCK