What you are actually seeing
- A rhythmic knocking that matches the spray arm rotation
- A high squeal or whine that builds through the cycle
- Not this fault: A noise with clean dishes and a full drain
Ranked causes on a Conservator dishwasher
- Wash or drain pump bearing worn — Ranked here because: this platform is mechanical by design, so wear parts and couplings fail as parts rather than as symptoms of a board
- Spray arm bearing or retainer worn — Ranked here because: a simple machine gives the owner more ways to load and dose it wrong, and those show up as faults
- An item hitting a spray arm — Ranked here because: these machines are commonly installed by the owner or the delivering dealer, and levelling and venting errors are the most frequent finding
- Cabinet contact, loose toe plate or plumbing — Ranked here because: movement loosens fasteners and joints that would never move in a fixed installation
- Machine not level in its opening — Ranked here because: levelling is upstream of the door, the drain and the vibration path all at once
- Hard debris in the sump, filter or chopper — Ranked here because: the pump is the only powered part in the drain path and it takes everything the machine washes off
What to check, and in what order
- Spin both spray arms by hand and check they turn freely and have no play
- Run a short cycle with the machine empty
- With the machine running, press on the door and the adjacent cabinet fronts
- Check the machine is level and secured to the counter or the cabinet sides
Steps you can safely do yourself
- With the machine running, press on the door and the adjacent cabinet fronts — Tools: none — Estimated time: a few minutes
- Check the machine is level and secured to the counter or the cabinet sides — Tools: spirit level, screwdriver — Estimated time: about twenty minutes
- Note which phase of the cycle the noise happens in: fill, wash or drain — Tools: none — Estimated time: one full cycle
- Stop the cycle, remove the filter and check the sump by hand for hard debris — Tools: gloves, flashlight — Estimated time: about a quarter of an hour
- Spin both spray arms by hand and check they turn freely and have no play — Tools: none — Estimated time: a few minutes
Safety
Safety
unplug-before-service branch-circuit-15-20a
When to call a technician
a pump bearing is whining, since that is a pump replacement the drain pump is jammed by something that cannot be reached from inside the tub the noise comes with water left in the tub or a cycle that will not complete
Nearest pages
What this page does not cover
Not this fault: the family pages for the laundry, refrigeration and cooking lines Not this fault: model-specific pages once the model and serial plate is read
Links: - [Common Conservator Dishwasher Problems](/blog/conservator-dishwasher-problems) - [Common Conservator Dryer Problems](/blog/conservator-dryer-problems) - [Common Conservator Freezer Problems](/blog/conservator-freezer-problems) - [Conservator Dishwasher: Does Not Clean or Dry](/blog/conservator-dishwasher-cleaning-performance)
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
