Checked heat exchanger, checked igniter, inducer motor, blower motor, venting, safety limits, and gas operation. Cleaned drain trap, drains, flame sensor, burners and fittings. Ran test, system is operating properly upon completion of job. We found that the inducer is getting weak. Its amp rating is 1.35 amps. While running, it draws 1.3 to 1.4 amps. When starting, it makes a grinding noise. Also, the inducer is pulling 1.5wc, which is close to the pressure switch rating.