I have a clicking noise coming from my dash when the ac or heater is turned on

Hello, it sounds like you may have a concern with a temperature blend door actuator. This is a component that meters the temperature from hot to cold inside the dash so that you get the right temperature of air out of the vents. This will constantly be changing depending on where the setting is. A quick noise is a motor that might not be working properly. Hands-on testing is required to figure out what is going on. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops