Spider hood cover not releasing or locking? Well it's not necessarily the cog so before you order one open the motor to check.
I've just done this & found an as new cog.
So after trying to get the motor to stop in another position, too difficult to be 100% sure without marking, & trying with a direct feed from a battery....it still was intermittent after half a dozen attempts.
I decided to remove the motor body by unscrewing the 2 screws & carefully withdrawing it complete with worm drive, make sure you don't loose the spherical bush & small black cog + sprung washer from the end. Removed the gasket & sprayed the contacts with contact cleaner(not WD40), put it all back together & after a dozen+ operations all's well.........so far.
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