Written by
Lena Hartwell Appliance Care EditorPublished October 27, 2026
VERIFIED
Error codeF4 / F-4
ApplianceWall Oven
Summary of the F4 alarm
Item
Detail
Shown
F4 and a beep
Meaning
Open circuit in the oven temperature sensor
Detected after
16 consecutive oven temperature conversions
Result
Bake modes cannot start and the controls do not respond
Also possible
An odd number in the display
A misleading first impression
A dead-looking oven makes people suspect the ERC or the selector first. The manual warns that the open sensor is the real culprit here. The check happens only when cooking is attempted, so time of day mode never shows F4.
Series
This code belongs to the older ERC family: CPS/CPD, ECPS/ECPD, CPTS/CPTD, PCS/PCD, MCS/MCD and ECS/ECD.
Compare with
F3: the same sensor reading shorted instead of open
F6: an EEPROM checksum error that also limits the oven to time of day and timer
Dacor wall oven repair in San Francisco
If F4 stops your Dacor from heating, call (415) 687-5926 to ask about Dacor wall oven repair in San Francisco and the Bay Area. Lead with the code and the model number, and describe what the display showed.
Model compatibility: Dacor reuses codes across series and model years, so F4 / F-4 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
F4 means the ERC found an open oven temperature sensor circuit on 16 consecutive conversions.
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.
You submit a request with your appliance model and symptom, we confirm an appointment window, and a technician performs an on-site diagnosis. You then receive a clear estimate and decide whether to proceed before any repair begins.
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Replacement parts are selected for the exact model and confirmed with you before ordering or installation.
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Book a repair online or call us — clear estimates and approval before any repair work begins.
