Red Light

The bottom switch will show a constant red light when the iT500RX Receiver is ready to pair.

Green Light

When the Receiver and the Thermostat are powered and paired the bottom light will be green.

Blue Light

The flashing blue light indicates a call for heat or hot water from the iT500 thermostat.

Orange Light : Failsafe Mode

An orange light indicates your receiver has lost communication with the thermostat. You will need to go through the pairing process again.