So another question on this one..... I went tonite to test the FC level (for tonite's ONLT) and tho the system is set to PF6 (24 hour filter going), I heard nothing when I approached. For some reason, the circ pump wasn't running. When I hit the clearray button it comes on (as does the blue light), but shouldn't it be on on its own like it always is with PF6?