E20
Hobart
Overtemperature / Overheat Protection Fault
Hobart dishwasher displays E20; exhaust temperature too high or overheat condition detected.
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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
Failed temperature limit switch, Blocked exhaust or condenser, Stuck heater relay causing overheating, Faulty exhaust temperature sensor
How to Fix / Troubleshooting
Safety first: Turn off power and allow the machine to cool completely before inspection.
- Check ventilation: Ensure that the dishwasher has adequate clearance and that surrounding ventilation hoods are operating correctly.
- Inspect exhaust path: Remove panels to inspect the exhaust or condenser path for blockages, grease, or scale buildup. Clean thoroughly.
- Reset high-limit: Locate any manual-reset high-limit thermostats on the exhaust or heater assemblies and reset them if tripped.
- Monitor operation: After cleaning and resetting, run a test cycle while monitoring temperatures. If overheating recurs, a stuck heater relay or faulty sensor may be present.
- Technician service: Overheat faults can damage components; have a Hobart technician test heater control circuits and replace defective parts.
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Repair Difficulty
Hard
4/5
Required Part
High-Limit Thermostat
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