What does it mean when thermostat flashes on heat pump?

When the thermostat on a heat pump flashes, it typically indicates that there is a problem or that the system is in a mode that requires attention. Common reasons for the flashing light include a malfunction in the heat pump, a need for maintenance, or that the system is in defrost mode. It's important to refer to the user manual for specific error codes or to contact a professional for diagnosis and repair. Regular maintenance can help prevent such issues from occurring.