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Table 4
7.1
Resetting High Limit Switch
Occasionally, the high temperature limit shut off device may
trip the reset. This occurs when water temperature exceeds
190 °F. The shut off device may also trigger from a power
outage or electrical storm.
To reach the thermostat:
▶ Disconnect power cord (or shut off circuit breaker - model
ES8) and remove the front cover.
▶ Firmly press reset button [B] with the tip of a ball point pen
or similar object.
Fig. 13
A click indicates the reset was tripped.
▶ Reconnect power.
IMPORTANT: Check the operation of the thermostat:
▶ Turn temperature dial from high to low.
If the red light does not go off on low setting:
▶ Turn off power supply and call a service person to replace
the thermostat.
If the red light does go off the thermostat is working well:
▶ Place dial setting to desired setting.
A lower setting is more economical, reduces the risk of
scalding, and may also help to slow down the natural
accumulation of lime scale inside the water heater.
▶ Replace cover plate.
Tronic 3000T – 6 720 801 072 (2022/02)
Call a technician if the high limit needs to be reset frequently.
Frequent activation of the high limit may indicate that lime scale
has formed on the heating element.
▶ Please refer to section 5.5 Descaling the Heating Element
for further details.
7.2
For more technical tips, service bulletins, videos, and FAQs,
please visit our Support webpage here;
www.boschheatingcooling.com/techsupport.
Alternatively, you can scan the code below with your cellphone!
6720801072-12.1V
Fig. 14
CAUTION:
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