E8
Viking
Heater Overheat or Open Circuit
Microwave shows E8 and may not start convection or grill functions.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Open grill or convection heater, Tripped thermal fuse on heater, Loose heater wiring, Failed heater relay on control board
How to Fix / Troubleshooting
Safety: Disconnect power and allow the unit to cool before servicing.
- Visual inspection: Inspect the grill and convection heaters for visible breaks or burn marks.
- Check wiring: Access the rear or top of the Viking microwave to inspect heater terminals and wiring for loose or burned connections.
- Thermal fuse: Locate any thermal fuses mounted near the heaters. If a fuse has opened (testing recommended for professionals), replace it with the exact Viking-rated part and address any overheating cause (blocked vents, fan failure).
- Replace heater: If a heater element is open or physically damaged, replace the Viking heater assembly.
- Control board: If heaters and fuses are good, the control board relay may be faulty and require replacement.
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Repair Difficulty
Hard
4/5
Required Part
Grill / Convection Heater
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