Weil McLain Boiler Too Much Pressure

Weil Mclain oil fired burner (Carlin) from 2008. - One zone system (does NOT have a domestic hot water coil) - Pressure high causing relief valve to open at 30 PSI - Replaced: Pressure Relief Valve, Water feeder (Watts 12-15 PSI), and Extrol 30 Expansion Tank Today in hopes of correcting issue -Verified Circulator has 120V and operates. - Pressure reaches 30 PSI at approximately 140 degrees which causes relief valve to relieve Where should I go from here?