worn brushes could also cause intermittent function. it's so easy to check voltage on the SD, just drop the kick panel, and take the cover off the wires feeding the blower, then check for voltage when the blower is supposed to be on... if it's hot, then it's the blower, not the ccu.

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!