Just purchased and fitted a new pump (model-481236158434) to my CDA CW494 dishwasher and now I’m getting error code F8. This is not being caused by over-sudding as I haven’t used any type cleaner yet, which only leaves low water pressure from the circulation pump. Adjusting the incoming water pressure right up to maximum has no effect. The pump purchased was listed as a replacement for the original. Anybody got any ideas?