Written by
Lena Hartwell Appliance Care EditorPublished October 27, 2026
VERIFIED
Error codeC34
ApplianceWall Oven
C34 explained
An open thermistor has been detected on the ambient temperature probe belonging to the relay board. It mirrors C24, which is the same fault on the control board.
Which ovens
You will find C34 in the older Renaissance wall ovens: EORS and EORD (Epicure), MORS and MORD (Millennia), in models 127, 130, 227 and 230.
What owners are given
The guide names the fault and stops. Probe checks are left to a technician.
For help with C34 on a Dacor oven in San Francisco or across the Bay Area, call (415) 687-5926. Read Dacor wall oven repair beforehand if you like, and have the model number and the code ready.
Model compatibility: Dacor reuses codes across series and model years, so C34 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
C34 means the relay board's ambient temperature probe is open (open thermistor).
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.
Yes. We provide an upfront estimate after diagnosis. No parts are ordered or installed until you approve the work, so there are no surprise charges.
Replacement parts are selected for the exact model and confirmed with you before ordering or installation.
Service areas are listed on the Locations page. Contact us with your ZIP code to confirm current coverage for your address.
Ready to get your Dacor appliance working again?
Book a repair online or call us — clear estimates and approval before any repair work begins.
