DavidF.C280 (I keep thinking that that's me when I see that!!),
It seems as though you have already figured your problem out, but just so you know, you can find out how many current, and stored poly-V-belt recognitions there are via your Climate Control Unit.
Press and hold REST (car and climate control on) for about 5 seconds until you get the number 1 and another number (in-car temp), it should flash between the 2 numbers. Press the ARROW down, to direct the air to your feet, that should put you at menu number 52, which is the number of stored slips in your poly-v-belt. If you press the button again (air flow to feet) you should be at 51, and that tells the current number of slip recognitions in the poly-v-belt.
Give it a try! Good luck!