Fisher & Paykel Dishwashers F9 Error: Drawer communication fault
Fisher & Paykel dishwasher error code F9 is a mid-severity fault meaning Communication fault between top and bottom drawers. If only one drawer is displaying F9 and the other is running normally, you can continue using the functioning drawer.
~50%
DIY Fixable
From $130
Typical Repair Cost
1–2 hrs
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
Maybe. If only one drawer is displaying F9 and the other is running normally, you can continue using the functioning drawer. The faulted drawer should not be operated. Schedule diagnosis within a few days to avoid leaving the inter-drawer communication fault unresolved.
Can I reset the code?
Yes. A simultaneous power-cycle of both drawers will reset the communication link. If F9 clears and does not return, the fault was a transient communication dropout. If F9 returns after the first power-up, the cable or a board requires inspection.
When to stop immediately?
Stop if you notice: F9 returns on every power-cycle after confirming the inter-drawer cable is seated, Neither drawer responds after multiple power-cycle attempts.
Symptoms You May Notice
F9 displayed on one or both drawers of a DD24D
On double-drawer models, F9 appears when the two drawer control boards lose communication with each other through the inter-drawer connection.
One drawer operates normally; the other is locked
The primary drawer (typically the lower) may continue to function while the secondary drawer faults out with F9.
Both drawers unresponsive simultaneously
In some cases both drawers stop responding when the communication link is broken, as the secondary board waits for master synchronisation.
Possible Causes
Loose inter-drawer communication connector
The cable that connects the upper and lower drawer control boards on a DD24D double model has worked loose at one or both ends.
DIY PossibleDamaged inter-drawer cable
The flat ribbon or round cable between drawers has been pinched or damaged by the drawer sliding mechanism.
Requires ProfessionalFailed secondary drawer control board
The upper drawer PCB has failed, preventing it from responding to communication signals from the lower drawer master board.
Requires ProfessionalSoftware / firmware mismatch after board replacement
If one board has been replaced with an incompatible firmware version, the two boards may fail to establish communication.
Requires ProfessionalSafe Checks You Can Do
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1
Power-cycle both drawers together
Switch the entire DD24D double drawer unit off at the wall for 60 seconds, then restore power. Both drawers must power up together — do not try to reset one drawer independently.
A synchronous power-cycle forces both boards to re-negotiate their communication link from the start.
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2
Inspect the inter-drawer cable connection
After unplugging, carefully open both drawers and check the cable that passes between the upper and lower drawer units (typically visible at the rear of the inter-drawer gap when both drawers are open). Confirm both connectors are firmly seated.
This cable is the single most common physical cause of F9 — it can be dislodged by vibration over time.
When to Call a Professional
Contact a qualified technician if:
- Inter-drawer cable is damaged (pinched or abraded) and requires replacement
- Secondary drawer PCB has failed and requires replacement with firmware-matched board
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
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