What is the Fisher & Paykel Dishwasher A3 error?#
A3 carries a safety edge: a heating relay on the drawer board has welded shut, so the element can stay live when it ought to be off. The signs are a compartment running too hot, a tub too warm to touch, a cycle bailing out, and at times a faint scorched smell. Since a welded contact can keep the element energised, take the drawer out of use until the board is renewed. This is not something you rinse clean — the offending relay is sealed inside the electronics.
A3 on a Fisher & Paykel Dishwasher: likely causes and repair cost#
On a Fisher & Paykel Dishwasher, the A3 code signals: heater relay stuck on the control module.
| Likely cause | Typical likelihood |
|---|---|
| Welded or stuck heater relay contacts on the drawer control module | Most common |
| Control module fault leaving the heater energised | Common |
Typical professional repair: $250–$500 · Difficulty: professional only · usually a technician job
Symptoms that often accompany A3: Drawer overheating; Tub uncomfortably hot to touch; Cycle faulting out; A faint burning smell
Technician diagnostic sequence for A3:
- Stop using the drawer — a stuck heater relay can leave the element powered continuously
- Confirm the fault is the module relay, not the element, by checking whether heat stays on when it should be off
- A3 indicates a control-module relay fault, so the module is replaced as a sealed unit
- Individual relays are not serviced in the field on the DishDrawer control module
- After replacement, run a cycle and confirm the heater cycles off on schedule
Parts a technician may check or replace: Drawer control module
Field note: A3 is a stuck-ON heater relay — the contacts have welded closed, so the element stays powered. The drawer control module is replaced as a unit; the relay is not repaired on its own.
Safety note: A welded heater relay can keep the element powered when it should be off — stop using the drawer until the control module is replaced.
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How to troubleshoot the A3 error yourself#
The right response is to stop, not to poke around. A stuck contact can hold the element live without pause, so retire the compartment until it is mended. Proving it is the board's switch and not the element — by watching whether heat lingers past the point it should be gone — is the trade's check, and it lands on the electronics because this alarm names a switching failure there. On these drawers a single relay cannot be swapped out in the field, so the whole board is renewed; a wash is then run to confirm the heat now cuts off on schedule. Beyond retiring the compartment there is no owner-safe repair, so with that heat danger in mind, book the visit promptly.
Is the Fisher & Paykel Dishwasher A3 error worth fixing?#
A3 is worth mending, and quickly, given how hot a runaway heater can get. Reckon $250 to $500 for a fresh logic board to hand back safe heat control on a four-figure built-in worth keeping. Against replacement the sums favour repair, yet the real driver here is safety, not economy: a compartment that can run away on heat has to be fixed before it is used again. On a machine otherwise sound, new electronics return a valuable appliance to safe service.
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Fisher & Paykel Dishwasher A3: frequently asked questions#
What does the A3 error mean on a Fisher & Paykel Dishwasher?#
A switching relay on the board has welded shut, so the heater keeps drawing power past the point it should cut out. The compartment overheats and bails, and the logic board is renewed as one sealed part to cure it.
Is it safe to keep using a Fisher & Paykel Dishwasher that shows the A3 error?#
No. It can hold the heater live when it ought to be idle, so it is not safe to keep running — retire the compartment until the board is renewed. That danger of a runaway element is why you act without delay.
Can I clear the A3 error myself, or do I need a technician?#
This is not a self-repair. The safe owner step is to take the drawer out of service; confirming the welded contact and fitting the sealed board is trade work, since a single relay cannot be changed on its own here.
How much does it cost to repair the A3 error on a Fisher & Paykel Dishwasher?#
Around $250 to $500 for the logic board, renewed complete. One relay cannot be mended alone, so the board is the part, and a technician verifies the welded contact before ordering it.
Which parts usually fail when a dishwasher throws the A3 code?#
The board itself is the part — a welded switching relay within it. That contact cannot be changed alone, so the electronics are renewed entire once the stuck-on heat is confirmed.
Is a Fisher & Paykel Dishwasher with the A3 error worth repairing?#
Yes, and before further use. At $250 to $500 a new pack is well under a fresh built-in, and because this is a safety fault, restoring safe heat control on a sound machine is the only responsible course.
Why does welded or stuck heater relay contacts on the drawer control module trigger the A3 error?#
Welded contacts will not open, so the element stays energised whatever the command, and the compartment overheats. Sensing heat that lingers when it should be gone, the board raises A3 to flag the stuck relay.
Appliance Repair Technician · 8 years experience
Experienced technician with 8 years specializing in dishwasher repairs and European appliance brands including Bosch and Thermador.
