1984 300cd........the heater blower stays on high no matter what buttons i push including the off button.i just rebuilt the mono valve,put a new aux pump on and put a different(known to work)ccu unit in and still having the same problem.what function does the blower regulator provide? could this be the culprit?
i did do a search and found a few things but nothing i havnt already tried.
thanks...........