Has any one removed the impeller from an furnace combustion inducer motor and then replaced only the motor ? If so is it worth the time ?

SOURCE: a carrier furnace

check the relay
the primary should have a low resistance
there should be a distinct click when 24 volts is applied to the primary
the secondary should be conductive when the primary is energized (contactors can corrode)
not a solution something to check

SOURCE: Furnace won't work because of a loose Inducer Motor Connector

Cut power to the system at the main disconnect.
Turn the gas off at the unit.

remove the panel, andsee if the stakon conection is intact. Chances are its just a loose connection from your description.

If the problem is not obviose, let us know what you did or did not find.

SOURCE: I have a Carrier weathermaker

Go ahead, just turn off power to breaker box first, or you'll be cursing for at least 10 minutes...

Gordon Meredith

• 35 Answers
• Posted on Mar 19, 2009

SOURCE: bryant furnance clicking, won't fire

try checking the pressure sensing switch,it has a tube that should run somewhere close to the inducer fan.sometimes this hose fills with liquids,and makes the units act funny.I don't know if you have a condensing unit or what.the furnace wont try to light if it cant tell the inducer motor is running.any induced draft unit will work this way.you can also do a temp. bypass of the pressure switch to make sure the contacts on it are closing just be sure your inducer fan is running,and you cant leave it like that its just a test.that is a safety feature you really need.

SOURCE: intertherm gas furnace inducer centrifugal switch

Chances are the draft inducer motor is not pulling enough CFM through the heat exchanger.

That is usually due to either blocked/clogged flue pipe/vent.
damaged, missing or dirty fan blades.
or a motor going bad.

Check those three things first, as they are the usually problem. Other than that, it would be a sticking or bad switch.

If you s-uck on the end of the hose like a straw, while it is attached to the switch and it does not pull in then you are looking at a bad switch/cracked hose issue. If it does, then you are back to the draft inducer motor or it's squirrel cage fan being bad.

These are notorious for rusting and the blades breaking off.