Wow...I think this reset technique just save me a service call as well!
I have a Whirlpool Quite Partner III, Model number GU2500XTPB3. The "clean" light was flashing 7 times, would go off for a couple seconds, then blink another 7, etc... Only the "cancel" button would work.
Another web site mentioned unplugging the unit for a while to reset the control panel...did not work for me. Luckily I found your posting. My Whirlpool is currently humming along once again.
THANK YOU!
William F, California, March 2007