Pratica Chef Express, Service Manual

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High Limit Thermostat
The high limit thermostat has an automatic reset bulb and does not need to be manually pushed.
There are two high limit thermostats installed on the right side of the unit next to the heater breakers
to protect the convection heater and Infrared element. The high limit bulbs are installed outside of
the bottom chamber surface and on the rear next to the convection heater.
The high limit thermostat protects the oven against overheating. When the oven temperature rises
above 752°F / 400°C, the contacts open and shuts off power to the heaters.
The high limit will reset automatically and usually happens within 5 minutes.
Testing High Limit Thermostat
1) Unplug the oven.
2) Remove the right-side panel of the unit.
3) Unplug the wires and test or continuity.
•
If continuity is present, the high limit is not tripped.
•
If there is not continuity between both terminals, the high limit has tripped and will need
to be replace or further troubleshooting is required to find the cause.