Furnace clean and tune. Cycled system. Checked heat exchanger. Found both shots were very rusted and several spots. One shot that has what looks like a deep crack on the shot. Found igniter worn. Checked burner, ok. Found water leak from transition assembly. Ventor motor bearings worn. Average life of this system is 14 years. Second opinion recommended. Office to set up second opinion. No charge pending second opinion results. Job complete.