INSSTE403NP1010
4. Troubleshooting
Problem
Solution
The thermostat is hot.
In normal operating conditions, the thermostat housing
can reach nearly 40°C at maximum load. That is
normal and will not affect the effective operation of the
thermostat.
Heating is always on.
Check if the thermostat is properly connected. Refer to
the installation section.
Heating does not run even if the
thermostat indicates it is on.
Check if the thermostat is properly connected. Refer to
the installation section.
The display does not come on.
Check if the thermostat is properly connected. Refer to
the installation section. Check the power supply at the
electrical panel. Check if the heating unit has a switch. If
so, ensure that this switch is turned on.
The display turns off a few
minutes and then turns on
again.
The thermal protection of the heating unit has opened
due to overheating. Check if the heating unit is in
good condition of operation and that clearance around
the appliance is according to the manufacturer’s
specifications.
The display has low contrast
when heating is on.
The load is lower than the minimum load. Install a heating
unit that is within the load limits of the thermostat.
The displayed ambient
temperature is incorrect.
Check the presence of an air stream or a heat source near
the thermostat, and correct the situation.
The display indicates E1 or E2.
Faulty thermal sensor. Contact the customer service.
Weak luminosity of the display.
Possibility of a bad contact. Check thermostat wirings.
Refer to the installation section.
