Technical data

48
Thermostat, function check
A function check should be done before the
thermostat is replaced.
1
Check that the thermostat closes fully.
Hold the thermostat up against the light and check
that no air gap is visible at the parting line.
If the thermostat does not close fully, it must be
replaced.
2
Heat up water in a vessel to 75°C (170°F) and put the
thermostat in, as in the illustration.
Repair instructions
3
Check after at least ½ minute that the thermostat is
still closed.
4
Heat the water up to boiling point, 100°C (212°F) and
check after at least ½ minute that the thermostat has
opened at least 7 mm (9/32").
If the thermostat does not open, replace it.