Dacor Range F6 Error: Control board comms fault
This dacor range f6 error code guide explains what this fault means for your Dacor appliance and how to respond safely. What F6 Means on a Dacor Range F6 signals a communication failure between the main control board and a secondary module or relay board. The oven is disabled to prevent unsafe operation. This code […]
~10%
DIY Fixable
From $300
Typical Repair Cost
60-120 min
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
Maybe. Normal bake and broil may still function. Self-clean should not be used until the latch circuit is repaired.
Can I reset the code?
Yes. Power cycling sometimes clears F6 if the switch fault was transient. Persistent F6 needs physical repair.
When to stop immediately?
Stop if you notice: Do not use the oven until the fault is cleared — unpredictable behavior is possible, If F6 appeared after a known power surge, have the control board tested before continued use.
Symptoms You May Notice
Half of the oven functions stop working
The bake or broil mode works but the other does not, or convection fan runs but heating does not activate. The board that lost communication controls the non-working function.
Display shows F6 during dual-oven operation
On Dacor Professional 48-inch dual-oven ranges, F6 appears when the upper and lower oven boards lose their data link. One cavity may work while the other is dead.
Clock and timer work but cooking functions are disabled
The display, clock, and timer operate normally but selecting any cooking mode results in F6 because the relay board that controls the heating circuits is unreachable.
Intermittent dropouts during long cooking cycles
The oven operates normally for 30 to 90 minutes, then F6 appears and the oven stops. Restarting may work temporarily before the fault recurs.
Possible Causes
Loose ribbon cable between control boards
The flat ribbon cable or wire harness connecting the main display board to the secondary relay board has vibrated loose at one connector, especially on ranges installed over downdraft vents.
Requires ProfessionalFailed secondary relay control board
The secondary board that controls heating relays and receives commands from the main display board has developed a fault, usually a blown communication IC or failed power regulator.
Requires ProfessionalCorroded board-to-board connector
Moisture from cooking steam has corroded the pins on the inter-board connector, creating intermittent high-resistance connections that drop the data link under vibration or heat.
Requires ProfessionalSafe Checks You Can Do
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1
Power cycle the range
Turn off the 240V breaker for 5 minutes to force both boards to reinitialize their communication handshake. Restore power and test each oven cavity independently.
If F6 only appears when both cavities run simultaneously on a dual-oven model, the shared power supply may be overloaded.
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2
Check for loose connectors at rear panel
With the breaker off, remove the rear access panel and visually inspect all ribbon cables and wire harness connectors between the boards. Reseat any that feel loose.
Connectors on Dacor Professional 48-inch models are accessible behind the top rear panel held by 4 Phillips screws.
Tools required
When to Call a Professional
Contact a qualified technician if:
- Power reset does not clear F6 — main or secondary control board likely damaged and needs replacement
- Wiring harness shows burn marks or melted connectors — professional rewiring required
- Board clears the code but oven runs erratically — board has sustained partial damage from a surge
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
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