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Section 5
Troubleshooting Information
1 . The thermostat does not call for heat and/or cooling .
• Check that connector pins are straight and intact
• Check that the thermostat is fully seated on the mounting plate . If the terminals are not fully
engaged, the firmware cannot activate the relays . This prevents power surges to the HVAC
system .
2 . The heating and cooling demands are reversed .
• Check that the thermostat is configured properly: Heat Pump (HP) or Furnace/Air Conditioner
(NON-HP) . If Heat pump check that the O/B Configuration under SETTINGS is correct .
• Check that the wiring is correct, especially the Y and W wires . If used with a Heat Pump, check
that the O/B wire is correct .
3 . The fan does not turn on .
• Check that the wiring is correct, especially the G wire .
• If heating with oil or gas, make sure the furnace is working . In gas heat mode (HG), the fan is
controlled by the furnace to avoid supplying cold air when the unit is starting .
4 . Display does not appear after the batteries have been replaced .
• Press the reset button on the bottom of the thermostat with a pin, straightened paper clip or
similar object .
Module 4 – Wireless HVAC Thermostats
Troubleshooting
5-1
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