Purchased an older house that has a Carrier HVAC. Seems to be working fine but I've noticed the red (when in heat mode) and blue indicator lights (when in cool) on the thermostat will fade in and out when the unit is running. I don't want to get the thermostat changed for no reason but don't want to damage anything in the system either. Could this be a power supply problem and if so where is the source of power for the 24 volts? Has anyone experienced such a problem with a Carrier Infinity? I would appreciate any help on this.
Thanks......