No heat but have ticking under dash center?

If you're experiencing no heat along with a ticking noise under the dash, it could indicate a few potential issues. The ticking might be caused by a malfunctioning blend door actuator, which regulates airflow and temperature in the vehicle's heating system. Additionally, low coolant levels or a clogged heater core could also lead to insufficient heating. It's best to have a mechanic diagnose the issue to ensure proper repairs.