Commercial heating repair. Intake blockage was the original call code on the heater. Cut out intake from the system, checked on the roof for ice and blockage. Camera the intake line, blew out all aspects of intake and exhaust on the unit. Cleared all rust and debris from the intake, outlet, and all hoses from the pressure switches to the inducer. Ran a battery of tests on pressure switches for continuity and function. Called customer support. Went through tests and determined that it’s most probably a bad induction motor.