My upper rack in the dishwasher isn’t getting clean; in fact, it doesn’t seem to even be getting wet. I’ve removed and cleaned the upper spray arm.
I’ve read that the food chopper could be clogging up the machine? How do I remove the lower spray arm to access and clean that area?
The following should help.
It does not specifically list your unit but yours should be a close match.
https://secured.whirlpool.com/Service/SrvTechAdm.nsf/2cd44500d572193285256a45004fd9d6/a045b97f9e505696852574ce0049f265/$FILE/8178741.pdf
Also here is the parts breakdown.
Replacement parts for WHIRLPOOL GU2455XTSS0 UNDERCOUNTER DISHWASHER | AppliancePartsPros.com