Dishwasher squealing whenever filling

Dishwasher Repair
1

Brand: Whirlpool Gold
Model Number: GU2475XTVY1
Main Symptom: squealing noise
What happens & when: Whenever filling with water, dishwasher makes squealing noise. Happens at beginning of cycle, mid-cycle rinse. Washes fine, doesn’t leak. But when filling it sounds like air coming out of a stretched balloon neck.

Error Code (if any):
Parts or tests already tried:
Photos / video link:

2

For Whirlpool GU2475XTVY1, that symptom points very strongly to the water inlet valve.

Most likely failure: Water inlet valve ( Whirlpool W10648041 Dishwasher Water Inlet Valve | Genuine OEM Part ). This valve is listed for GU2475XTVY1.

The timing is the giveaway: the squeal occurs only while the dishwasher is actively filling, both at initial fill and later rinse fills. Whirlpool troubleshooting specifically associates squealing/chattering during fill with restricted water flow, insufficient pressure, or a clogged/worn inlet-valve diaphragm/orifice.

That stretched-balloon-neck sound is especially characteristic of water being forced through a restricted/vibrating valve diaphragm.

Diagnosis order:

  1. Make sure the dishwasher’s water shutoff valve is fully open.
  2. Check the supply line for a kink/restriction.
  3. If water flow/pressure is normal, replace the dishwasher water inlet valve.
  4. I would not suspect the circulation or drain pump because the noise specifically follows the fill portions of the cycle.

Part: W10648041 — Water Inlet Valve

Confidence: ~90% inlet valve, assuming the household supply valve is fully open and water pressure is normal.