Thermostat - testing

1 To test the thermostat, suspend it by a piece of string in a container of water (see illustration).

8.1 Testing the thermostat opening temperature
8.1 Testing the thermostat opening temperature

2 Gradually heat the water, and using a thermometer with a range of at least 100ºC, note the temperature at which the thermostat starts to open.

3 Remove the thermostat from the water and check that it is fully closed when cold.

4 Renew the thermostat if the opening temperature is not as given in the Specifications, or if the unit does not fully close when cold.

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