Mine's a 123.190

Ok , so i think mystery solved. This might explain why i have constant heat even when the temp is turned to off (vacuum diaphragm/control behind center pod is shot or the line disconnected or rubber connector worn?). Also, why it worked before until i hit the kickdown switch. But then if the switch was still connected, and i plugged the a/c line, wouldn't the kickdown switch still be stuck open?

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Mike
Vancouver, BC
'79 300td 60k miles!
import from Japan