Build-up of soap in the machine...
that's why I always washer No. 4 where the detergent drawer is broken and can be fully removed so I can rinse all the detergent build-up from the fabric softener compartment before I run a load... ;-)
On the topic of time fills: I don't know. On the one hand, all the rinse fills took about 2 minutes and the water level was the same all the time (slightly above where the glass meets the gasket). On the other hand, the water level seems to be the same for each load size and when there's a big load in the washer it'll take considerably longer to finish its cycle as the timer pauses during the fill.
that's why I always washer No. 4 where the detergent drawer is broken and can be fully removed so I can rinse all the detergent build-up from the fabric softener compartment before I run a load... ;-)
On the topic of time fills: I don't know. On the one hand, all the rinse fills took about 2 minutes and the water level was the same all the time (slightly above where the glass meets the gasket). On the other hand, the water level seems to be the same for each load size and when there's a big load in the washer it'll take considerably longer to finish its cycle as the timer pauses during the fill.