Step-by-Step DIY Fix Guide
- SAFETY: Unplug the dishwasher.
- Remove the lower rack and lift out the filter — rinse thoroughly under running water.
- Straighten the drain hose at the back of the unit.
- Check the sink drain is clear.
- If connected to a garbage disposal, confirm knockout plug is removed.
- Reinstall the filter and run a rinse cycle.
If it's still not draining
- If the drain path looks clear but the code returns, the issue is more likely in the pump path or another less accessible restriction.
- A3 persists after cleaning filter and confirming drain hose is clear
What This Error Means
The A3 fault code on your Fisher & Paykel DishDrawer means: The dishwasher cannot drain properly. A3 and A20 both indicate a drain obstruction. These are user-addressable — check the hose and filter before calling a technician. This may also appear as A20 on some models.
The most common cause is: drain filter clogged with food debris.
This fault is user-addressable. Call a technician if A3 persists after clearing the filter and hose.
Most Likely Cause by Symptom
The Fisher & Paykel dishwasher may stop, pause, or refuse to complete the cycle normally.
Likely cause: Drain filter clogged with food debris
Check first: SAFETY: Unplug the dishwasher.
Water may remain inside the appliance instead of clearing normally.
Likely cause: Drain hose kinked or squashed
Check first: Remove the lower rack and lift out the filter — rinse thoroughly under running water.
Performance may drop because airflow, filtering, or draining is restricted.
Likely cause: Sink drain blocked, causing backpressure
Check first: Straighten the drain hose at the back of the unit.
Common Causes
- Drain filter clogged with food debris
- Drain hose kinked or squashed
- Sink drain blocked, causing backpressure
- Garbage disposal knockout plug not removed
What Not to Do
- Do not run another cycle with standing water in the tub — drain manually first
Model and Display Variation Notes
Model-family notes
- Fisher & Paykel dishwasher display wording and code formats can vary by series.
- If your model behaves differently, check the owner manual before trying any deeper maintenance step.
- Some models may display the same fault as A3, A20.
Display and panel differences
- Some control panels show this issue as A3, A20 instead of only A3.
- Panel wording and whether the code appears with letters, numbers, or a longer variant can differ by model family.
Parts, Tools and Service Options
Common parts
- Drain pump (~$40–$90) if blockages are cleared but A3 persists (varies) - consult technician
Manual and model check
Check your exact model and manual before ordering any Fisher & Paykel dishwasher parts.
Suggestions in this section are organized to support the troubleshooting flow first. Any future affiliate relationships should be disclosed clearly.
When Not to Keep Troubleshooting
A3 persists after cleaning filter and confirming drain hose is clear
How to Prevent It Recurring
- Clean the filter monthly and scrape plates before loading to minimise debris
Related Error Codes
Extra notes
- This page is based on Fisher & Paykel support material and stays conservative where model-specific guidance may vary.
- The goal is to help you identify safe first checks before you move into parts, service, or model-specific manual lookup.
Source and model notes
Last reviewed: 2026-04-09
Based on: Based on Fisher & Paykel support material and edited into consumer-safe guidance for the exact code family on this page.
View Fisher & Paykel North America Support
Model coverage note: Fisher & Paykel dishwasher code meanings can vary by series, control panel, and model family, so use this page as a safe starting point rather than a replacement for the model-specific manual.
Important: FixThisError is an independent guide, not the manufacturer. Use your model-specific manual when the panel wording or behavior differs.
Always disconnect power before inspecting appliances. If unsure, contact a licensed appliance technician.