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Error code · Merrychef · High-speed ovens

Merrychef High-Speed Oven Error Code E117: Magnetron Overheat

E117 appears only on old firmware and means the safety thermostat circuit was open for over 1 second during a cook cycle. Current firmware reports this as E115 and the manual lists E117 as no longer used, so load current firmware and see E104 and E115.

Medium · inspection needed

Medium: an overheat trip that stops cooking, but tied to out-of-date firmware.

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Code
E117: MAGNETRON OVERHEAT (old firmware)
Maker
Merrychef
Equipment
High-speed ovens
Applies to
All Merrychef eikon speed ovens (e2s, e3, e4, e4s, e5, e6)

What does Merrychef E117: MAGNETRON OVERHEAT mean?

E117: MAGNETRON OVERHEAT (old firmware) is a message from an earlier software release. During a cook cycle the oven watches the safety thermostat circuit, and if it is open for more than 1 second the old firmware shows E117. The manual states that current firmware uses E115 for this condition and that E117 is no longer used. So the first sign that E117 is on screen is that the oven is running outdated software. The manual's action is to load current firmware from merrycheftechnical.com and then refer to E104 and E115 for the actual overheat checks. Those checks follow the safety circuit: the cavity thermostat, the magnetron thermostats and the convection fan protection. The point of this page is that E117 is not a current warning of its own; it is an older name for an overheat trip.

Affected models and control systems

Merrychef eikon e2s with the QTS touch screen and SRB relay board controller, on old firmware only. The e2s manual lists E117 as no longer used.

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

  • E117 MAGNETRON OVERHEAT on an oven with older software
  • Oven stops cooking mid-cycle
  • Cook resumes only after the oven cools

Possible causes

Likely causes — what usually sits behind E117: MAGNETRON OVERHEAT on this control. A technician confirms which one it is before any part is replaced.

  • Safety thermostat circuit open for over 1 second during cooking (old firmware wording)
  • Dirty front filter restricting cooling air
  • Magnetron fins coated with grease
  • Oven out of date on firmware so it reports an old code

Safe checks before calling for service

✓ What an operator can do
  1. Let the oven cool, then clean the front air filter.
  2. Check that the vents are clear.
  3. Restart the oven and try a cook.
  4. Tell us the code and ask us to check the firmware version.

How a technician diagnoses E117: MAGNETRON OVERHEAT

  1. Read the log and the firmware version of the oven.
  2. Load current firmware from merrycheftechnical.com.
  3. Use the E104 checks: continuity through the safety thermostat circuit.
  4. Clean the magnetron fins and the filter.
  5. Confirm that any later trip appears under the current code and treat it accordingly.
! Leave this to a technician
  • Firmware loading needs maker files and a controlled procedure.
  • The safety circuit passes through the cabinet near mains and high-voltage parts.

How E117: MAGNETRON OVERHEAT differs from similar codes

E117 is the old-firmware form of the overheat trip; current firmware reports E115, and E104 is the thermostat circuit open at the safety level.

Technical reference

Maker documentation
Merrychef owner support
Edition
Feb 2021/v1; 50Hz & 60Hz, English
Models / control
All Merrychef eikon speed ovens (e2s, e3, e4, e4s, e5, e6)
Section
Section 5 Service information, Error codes & fault finding tips
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.

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E117: MAGNETRON OVERHEATQuestions about Merrychef E117: MAGNETRON OVERHEAT
Is E117 a current error?

No. The manual lists it as no longer used and says current firmware uses E115.

What should I do about it?

Load current firmware and use the E104 and E115 checks.

Does it mean a magnetron is broken?

Not by itself. It means the safety circuit opened, usually from heat.

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Need help with Merrychef E117: MAGNETRON OVERHEAT?

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