Doyon Bakery Oven Error Code ACCESSORY FAILURE 2: Second Input Lost
ACCESSORY FAILURE 2 means the second accessory input signal is no longer received, and the control goes to Off mode. The manual lists the message but gives no separate steps or causes.
High: the control goes to Off mode and the oven will not heat.
- Code
- ACCESSORY FAILURE 2
- Maker
- Doyon
- Equipment
- Bakery ovens
- Applies to
- Doyon JA10 / JAOP10 / JA20 with ECM-1 programmable control
What does Doyon ACCESSORY FAILURE 2 mean?
The ECM-1 control has accessory inputs, and each one is watched for a signal. When the second accessory input signal is no longer received, the control shows ACCESSORY FAILURE 2 and goes to Off mode. The manual lists the message in its display language table and in the Accessory Failure diagnostic, but it gives no separate steps. It also does not state what the second accessory is on this oven, so we do not guess. What can be said is how it differs from the first input. ACCESSORY 1 FAILURE is tied in the manual to the control compartment overheat alarm. The second input has no such description. With no further guidance, a technician has to identify whether anything is connected to that input, trace it, and find why the signal was lost.
Affected models and control systems
Doyon JA10, JAOP10 and JA20 ovens with the ECM-1 programmable control.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- ACCESSORY FAILURE 2 on the control display
- Oven in Off mode
- Oven not responding to a new start
Possible causes
Likely causes — what usually sits behind ACCESSORY FAILURE 2 on this control. A technician confirms which one it is before any part is replaced.
- Device or switch on the second accessory input has opened or failed
- Loose connection or damaged lead on the second accessory input
- Accessory input wired or set up differently from how it was installed
- Control input circuit damaged
Safe checks before calling for service
- Switch off the oven and let it cool.
- Check whether any optional equipment connected to the oven is switched off, unplugged or tripped.
- Power the oven up again to see whether the message returns.
- If ACCESSORY FAILURE 2 returns, call for service.
- Tell the technician which accessories are installed and whether any of them were recently changed.
How a technician diagnoses ACCESSORY FAILURE 2
- Read the display and confirm ACCESSORY FAILURE 2.
- Identify what is connected to the second accessory input.
- Check continuity and the signal at that input with a meter.
- Check the accessory device itself and its supply.
- Repair the device, wiring or control input and confirm the message clears.
- The accessory input terminals are in the control area with live line-voltage wiring nearby.
- Tracing signals needs a meter and the oven's wiring diagram.
- The manual gives no separate steps, so a technician must work from testing.
How ACCESSORY FAILURE 2 differs from similar codes
ACCESSORY 1 FAILURE is described in the manual as the control compartment overheat alarm. The manual gives no such description for the second input.
Technical reference
- Document
- Doyon JA10 - JAOP10 - JA20 operation manual (Equipement Doyon Inc.)
- Edition
- No edition or date printed in the document
- Models / control
- Doyon JA10 / JAOP10 / JA20 with ECM-1 programmable control
- Section
- A-20 System Diagnostics and A-30/A-31 Troubleshooting
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Is ACCESSORY FAILURE 2 the same as ACCESSORY 1 FAILURE?
No. They are separate inputs. The first is tied to the control compartment overheat alarm.
Why does it say accessory?
The control watches inputs for connected accessory devices, and the message means that signal was lost.
Can I keep baking?
The control is in Off mode, so the oven will not heat until the cause is found.
Need help with Doyon ACCESSORY FAILURE 2?
A technician confirms the cause on site and gives you the price in writing before any work starts.