Heater ..all settings, temperatures, and speed, including off....makes a click. 2 times every idk 20 seconds. When I change the setting n blend doors/ actuator ( not sure if this is right terminology but when setting changes and you hear doors move)moves sometimes that first set of clucks is a lot louder but then is the same. Pretty much it is just the same no matter what but sometimes when I change it it's louder at 1st.any ideas?
