Merrychef High-Speed Oven Error Code E116: Heater Failed
E116 means the oven asked for heat but the current in the heater circuit was under 1 A. The manual says to check the connections from the supply through the filter, fuse F1, the SRB and the heating element, and to replace the SRB last.
High: the heater is not carrying current, so the oven cannot heat as designed.
- Code
- E116: HEATER FAILED (Heater off on request)
- Maker
- Merrychef
- Equipment
- High-speed ovens
- Applies to
- Eikon e2, e3, e4 and e5 (high heater on the e6)
What does Merrychef E116: HEATER FAILED mean?
When a cook needs the heating element, the SRB switches it on and measures the current. If the draw is under 1 A, the circuit is not carrying power, and the oven records E116: HEATER FAILED (Heater off on request). The name can mislead. The manual's remedy is not to replace the element, because it rarely fails. Instead it works along the path of the power: from the supply through the filter, the fuse F1, the SRB, and out to the heating element. Loose connections are the usual find, and the manual adds a practical detail: when tightening the element's front nut, hold the rear bolt so the stud does not turn. The SRB is replaced last, only when every connection and the fuse are proven good. This page does not include any 100 C in 30 minutes test, because the manual gives no such test for this code.
Affected models and control systems
Merrychef eikon e2s with the QTS touch screen and SRB relay board controller. Confirmed in the e2s service manual; the opposite condition, heater on without request, is E102.
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
- E116 HEATER FAILED on the display
- Cavity warms slowly or not at all
- Microwave may still work while convection heat is missing
Possible causes
Listed in Merrychef's documentation
- Loose connections (element rarely fails)
Other likely causes — what usually sits behind E116: HEATER FAILED on this control. A technician confirms which one it is before any part is replaced.
- Fuse F1 open on the heater supply
- Mains filter connection loose or burned
- Element terminal nut loosened by heat cycling
- An SRB output that no longer switches the heater
Safe checks before calling for service
- Check that the breaker is on and the plug is firmly in the socket.
- Switch the oven off and on once and try a convection preheat.
- Note how long the oven takes to warm compared with normal.
- Keep the cabinet closed and give us the model and the code history.
How a technician diagnoses E116: HEATER FAILED
- Read the log for E116 and any E092 entries from recommission.
- Isolate the oven and check the supply, filter and fuse F1 for continuity.
- Inspect connections at the SRB and the heating element.
- Hold the rear bolt while tightening the front nut.
- Measure element resistance and replace the SRB only after all of that.
- The heater circuit carries full mains current through a fuse and filter in the cabinet.
- Tightening stud connections without twisting them needs the right tools and care.
How E116: HEATER FAILED differs from similar codes
E116 is too little current when heat is asked for, while E102 is current flowing when heat was not asked for.
Technical reference
- Maker documentation
- Merrychef owner support
- Edition
- Feb 2021/v1; 50Hz & 60Hz, English
- Models / control
- Eikon e2, e3, e4 and e5 (high heater on the 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.
Related Merrychef high-speed oven error codes
Does E116 mean the element is burned out?
Rarely. The manual says loose connections are the more common cause.
Is E116 the same as E092?
E092 is the same condition reported during the recommission test.
Can I keep using the oven?
The microwave may work, but the oven cannot heat as designed. Have it repaired.
Need help with Merrychef E116: HEATER FAILED?
A technician confirms the cause on site and gives you the price in writing before any work starts.