Carrier · Energy Recovery Ventilators
The thermostat's Y2 input is activated while Y1 is not, causing the unit to run as if both Y1 and Y2 were on.
Click steps to track your progress.
Check the thermostat wiring for Y1 and Y2.
Inspect the thermostat itself for proper function.
Ensure the thermostat is programmed correctly for the system.
Reset the unit after verifying wiring and thermostat settings.