He said his best suggestion was to replace the inducer motor since it was looking worn.
Inducer fan motor making noise.
The hvac people replaced the a170 three times they thought they had a bad batch of noisy rattling motors.
These do have a problem with noise and if it is the bearings of the motor then the usual fix is to replace the fan motor as a unit.
If the unit will turn on but the blower motor is not turning on there are a couple of ways to check if the draft inducer motor has gone bad.
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The same hvac company that installed the furnace replaced the inducer with the fasco a170 and i immediately noticed an unpleasant noise from the inducer fan motor a higher pitch like a hair dryer that you can hear throughout my house.
A failing inducer motor may create a noise shortly after a heating cycle begins.
That is the inducer fan and motor.
If the motor bearings are worn out the motor will be loud.
The draft inducer motor draws air into the burner and then exhausts it out the flue.
Other than that the furnace is looking pretty good.
If the draft inducer motor is unusually noisy replace it.
The draft inducer motor draws air into the burner and then exhausts it out the flue.
A blower motor or inducer motor on its way toward failing may also make a loud humming noise.
This could be a tapping noise or a humming or whirring sound.
The fan is in the combustion exhaust stream to provide evacuation of combustion gasses.
If the draft inducer motor is unusually noisy replace it.
Once the motor fails it leaves you with a furnace that will not function not something you want to happen in the middle of the heating season.