Upon arrival found the system had air in it and also saw the boiler pressure was around 5. Lightly lifted the arm on the autofeed and the autofeed lest more pressure into the system. Air got into the system when the autofeed never filled the system back up with water when air would leave the system. Bled both zones and got all air out of the system. Boiler pressure when leaving was 20 psi. Unit is working properly. May need to replace he autofeed in the future if it continues to stick and not add water to the system.