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Error Code

Fisher & Paykel Dishwasher A20

When A20 appears on a Fisher & Paykel Dishwasher, the safest path is: observe, do only the listed checks, then stop if the code returns. Platform context: Drop Door dishwasher — fault codes.

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Reviewed by Ethan Cole · Last reviewed August 10, 2026

Ethan Cole Written by Ethan Cole Appliance Repair Content Specialist Published August 10, 2026 Updated August 11, 2026 Technically reviewed August 10, 2026

Content status: Verified

Error code A20
Appliance Dishwasher
Affected model series Drop Door dishwasher — confirm the rating-plate model before acting
Quick answer

What A20 often looks like on Fisher & Paykel Dishwasher appliances, plus safe next steps.

Model compatibility: Fisher & Paykel reuses codes across series and model years, so A20 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.

Plain language

What this code means

Official wording for A20 on the Drop Door dishwasher — fault codes line may vary by model. Use the safe checks below and refer to your model manual for the exact meaning.

Signs

Symptoms you may notice

  • The dishwasher display shows A20 during or after a wash cycle.
  • The cycle may pause, stop early, or fail to complete while A20 is shown.
  • The door may be difficult to open or close while the fault is active.
Before you call

Safe checks you can make

These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.

  • Check that the door is fully closed and latched before restarting.
  • Confirm the water supply tap is fully open and not kinked or restricted.
  • Check that the drain hose is not kinked and the drain path is clear.
  • Switch the dishwasher off at the wall, wait about 60 seconds, then switch back on and retry once.
  • Record the full model and serial number from the rating plate.

Important safety warning. Do not open internal panels, remove covers, or access wiring or the control board. Do not bypass the door safety interlock. If you notice water pooling near electrical parts, a burning smell, or sparks, switch off power at the wall and call a professional immediately.

Get help

When to call a technician

Persistent A20 usually needs hands-on testing. Contact Fisher & Paykel Appliance Repair (independent Fisher & Paykel repair — not an official manufacturer service center) for a written estimate after diagnosis.

Code still active?

Have this Fisher & Paykel alert verified on site

Repeating fault codes usually need platform-specific testing. We confirm the cause and price the fix before work begins.

FAQ

Frequently asked questions

References

Sources & references

Code still active?

Have this Fisher & Paykel alert verified on site

Repeating fault codes usually need platform-specific testing. We confirm the cause and price the fix before work begins.

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