5-1
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 rmware 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 congured properly: Heat Pump (HP) or Furnace/Air Conditioner
(NON-HP). If Heat pump check that the O/B Conguration 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
Section 5
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