26
Troubleshooting guide
Problem
Possible causes Things to try
Very high
temperature
reading
Software issue
Factory reset (see p24)
Incompatible sensor
Use a multimeter set to 20K
Ω
to test the resistance of
the sensor probe. If the probe does not read between
8 to 12K
Ω
then it is likely to be a sensor probe from a
different manufacturer and will need to be replaced with a
ThermoSphere NTC10K sensor probe.
More than one sensor
installed
Sometimes more than one floor sensor is connected to
the thermostat by mistake. This results in a high resistance
and incorrect temperature readings that are much higher
than normal. Check that there is only 1 sensor probe
connected to your thermostat.
High temperature
influence
Check whether there are any high temperature influences
around the thermostat or the floor sensor probe.
For example if the thermostat is situated on a south
facing sunny wall in a conservatory it may pick up a high
temperature from the solar gain.
If the floor sensor is in the floor and situated near a hot
water pipe it will read a high temperature.
If the floor sensor is in an area of the floor covered by a
mat or dog bed this area of the floor would read much
hotter than areas of the floor not covered by insulating
objects**
*Electric underfloor heating systems should be controlled by a floor sensing thermostat wherever possible. While it is possible to use our thermostats
on air sensing mode this should only be a temporary solution until a floor sensor probe can be fitted in accordance with our instructions
