Written by
Elena Navarro Appliance Repair Content SpecialistPublished September 11, 2026Updated October 20, 2026
Error codeF4
ApplianceWall Oven
Quick answer
F4 is the open oven sensor alarm on older Dacor ovens with the ERC control. Bake modes cannot start and the controls may not respond.
Model compatibility: Dacor reuses codes across series and model years, so F4 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
Alarm, open oven temperature sensor circuit, read 16 consecutive conversions while a cooking operation is attempted.
An F4 alarm on a Dacor oven with the ERC electronic oven control means the control sees an open oven temperature sensor circuit. It has to find that condition on 16 consecutive oven temperature conversions before it shows F4 and beeps.
Why the oven may seem dead
With an open sensor, the bake modes cannot be activated and the controls will be non-responsive. The manual warns that at first appearance you may suspect the ERC or the selector instead of the sensor. A strange number may also appear in the display.
Only when you start cooking
The test is performed only while a cooking operation is being attempted, so the F4 message is not displayed in time of day mode.
Series covered
F4 belongs to an older series of ERC ovens: CPS/CPD, ECPS/ECPD, CPTS/CPTD, PCS/PCD, MCS/MCD and ECS/ECD.
Related codes
F3 is the same sensor reading as shorted instead of open. F6, the EEPROM checksum error, also leaves the oven limited, with only time of day and timer working.
Dacor wall oven service in Los Angeles
An unresponsive Dacor wall oven showing F4 can be checked by phone at (310) 742-1907, with service in Los Angeles. Keep the model number and a description of what the display showed close by, and read about oven repair.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your Dacor appliance?
Book a specialist visit for a clear estimate and approval before any repair.
