Fix your noisy furnace - step by step guide to Furnace inducer motor replacement

My 13 year old Furnace was making a high pitched squeal, so I did some trouble shooting and narrowed it down to the Inducer motor. This was an easy DIY, save yourself a bunch of money and skip calling the HVAC company.
This is a how-to guide on replacing part number HC21ZE122A, a Bryant or Carrier Inducer Motor
i bought it for just under $90 on amazon: amzn.to/2SFgfYO
you only need basic tools like a 1/4" drive socket a flat head screwdriver and a 1/8" allen key.

[@johnmcrae5043]

Nice video. I have an Amana furnace/AC combo outside (made by Goodman); the inducer fan wouldn't start so the furnace wouldn't fire up. I could manually spin the fan and it would start spinning, and the furnace would start. The local HVAC guy wanted $900 to replace the fan; I bought the assembly from Goodman for $150 and installed it myself.

[@briankurkjian6891]

Just ordered the part and it's on its way. You've saved me a bunch! Thank you.

[@PlatoonGarage]

Glad it was helpful

[@apt2001]

If anyone is replacing the inducer motor themselves, you absolutely must replace a high temperature gasket that sits between the motor assembly and the case. The old gasket that we could see in this video is fully destroyed (kzbin.info/www/bejne/jHjZmml3aa91mdE) and not capable of properly isolating the air flow. It is prone to leak carbon monoxide outside of the combustion chamber which is very dangeourous. In addition, if you have a budget, pay a bit more and replace the entire assembly, not just the motor, This way you'll avoid all the errors of reassembling all the parts together and will have a fully working furnace for another 10-15 years. In addition, the full assembly comes with an installation guide, a new gasket, and a set of new screws instead of the old rusty ones.

[@sergiodoordie319]

Yes sir

[@khalilnouhi]

What is the entire assembly code? I can't find a replacement part.

[@marshallandroxy]

My replacement inducer motor has a white foam gasket already on the back of it, the old one had a rubber one that was on the furnace unit itself (the plenum?) - when I removed the old one the rubber gasket broke apart. Is the white foam gasket on the new unit all I need?

[@tinyku]

For that fan where you have the allen key to get that motor coupling off, I believe there should be one fan blade directly in line with it, with an opening for the allen key. If you pause at 6:33 you can see it on the blade 2 left of the thumb, where the bottom of the blade is open.

[@PlatoonGarage]

Correct, there is a small space in-between 2 of the fan blades that allows you to get the Allen key in there. 👍

[@tinyku]

@@PlatoonGarage I ended up doing this job today. I got lucky, the set screw on the motor I was able to break off fairly quickly, I thought my allen wrench was going to snap but it didn't. My old motor was acutally OK. It was making a ton of noise when it was spinning, but it turned out I think some rust dust got into the bearings. I put the new motor in, but cleaned up the old motor and now the old one doesn't make any noise either and spins just fine. So I guess I'll keep it in case something happens. Very easy repair though

[@PlatoonGarage]

@@tinyku awesome job. I remember applying a lot of force in that Allen key and thinking it was gonna snap for sure, only to have it break the set screw loose. A few sighs and curse words later, was back to reassembly

[@leohodappsr.6592]

You forgot to mention a gasket when reassembly the unit.

[@MyBusinessWebDesign]

Thanks! Great vid. Got one on the way and used your link 🔗!

[@PlatoonGarage]

@@MyBusinessWebDesign thanks for watching and appreciate the support!

[@chadanderson6705]

Thanks for the video. I ordered the entire assembly so I will be replacing it today. Question, the new assembly already has the bolts in the rubber isolators, do I have to take those out? Seems like I could just leave them on there and remove the 3 mounting screws...

[@PlatoonGarage]

I would replace everything. Can't hurt to have all new pieces in there

[@dadventure-tales]

Can you share where and how much you got the whole Assembly for? We're you able to replace it with ease? Thank you!

[@ikravmaga]

I have the exact furnace and issue but can't figure out the part number, short of pulling the motor.

[@leotoussaint8872]

For the rubber isolaters, did you tighten them all the way? I have the same type motor but it makes a loud rattling noise when the fan kicks on. I'm wondering if I need to tighten the screws on the rubber isolaters. Hvac guy that installed mine is trying to tell me its normal.

[@PlatoonGarage]

The screws are tight, but the rubber isolators are supposed to allow for a little bit of flex but not loose. Hopefully that helps some

[@heatherkohan9869]

My furnace is making noise while it runs not sure what it could be

[@thurm101]

Mine is similar to yours. My fan wasn’t turning. I flipped it with my hands. It spun for a bit and went back off. So I sprayed it with some blaster and it started to spin. The heat fired up too. So it stopped and no heat again. But it’s still spinning. My question. If it’s spinning shouldn’t the heat come? I just need it to run a bit until I can order the motor off Amazon.

[@PlatoonGarage]

I'm no expert on these. But I think the fan comes on and spins for a while and then the ignition has a glow plug that heats up, then the gas turns on and everything works to blow the hot air through the system. Maybe you have a sensor or something in the ignition that's not working properly

[@Woods2288]

I just need that little black fan on it. It’s been making a rattle noise

[@lar4305]

the tin guard above the outside plastic fan wheel vibrates and when a squeeze it with my hand it stops making noise? Is the fan motor bad or does it just need re positioned? or replaced.?

[@PlatoonGarage]

Hard to say without being able to look at it myself. If you think you can reposition it or maybe apply oil to make it quieter try that first before replacing.

[@lar4305]

@@PlatoonGarage do you need to remove it to oil it?

[@PlatoonGarage]

@@lar4305 depends on what area you are applying oil to, I don't know where your Boise is coming from

[@HvAcAprentice]

Thanks!! Great Video!!!

[@scsclassics]

Actually

[@johnnyli4351]

Is the motor HC21ZE122A the same as HC21ZE121A? My furnace look exactly as your but it is brand Payne with inducer motor Carrier part number HC21ZE121A.

[@PlatoonGarage]

Sorry, unfortunately I don't know if they are the same

[@rarin2din]

No they are different 21A is for a smaller capacity furnace

[@justinelaulu8091]

What’s the name of that part from Amazon please I wanna order that part for my furnance

[@PlatoonGarage]

😂 did you even watch the video? I say the part within the first 30 seconds. It's also in the description

[@modeman69]

Great video… very informative…. Just one question….. couldn’t u just purchase the whole part instead of taking it apart to get to motor ?…. They should be able to sell all three pieces already assembled, no?

[@PlatoonGarage]

You can purchase the whole assembly correct. At the time this video was made, I could only get the motor

[@mojojoje]

Thank you

[@diqqie7025]

Mine doesn’t spin at all the black thingy part what dose that mean ?

[@PlatoonGarage]

Hard to diagnose from your description. The black fan is just attached to the inducer motor, so if it's not spinning, then chances are the motor has failed and won't turn at all

[@RobertoRomero-fj7gd]

The only thing I needed help with.... You didnt record! 🤬

[@seangarcia2171]

That bolt is a bitch on tge motor.... been working on it for an hour....

[@PlatoonGarage]

It definitely sucks. I thought I was going to break my Allen wrench, eventually it came free

[@seangarcia2171]

@@PlatoonGarage I'm sure the penetrating oil helped but it wasn't until I used a cigar torch to heat up the bolts to win a finally broke after that it was pretty much smooth sailing.

[@JeffRejent]

No gasket??? Exhaust that carries carbon monoxide out of the furnace should be sealed with a gasket. Unless you like breathing that crap.

[@PlatoonGarage]

Furnace is in a ventilated 300sq. ft. Storage room with a carbon monoxide detector right outside the door, zero issues so far 🤷‍♂️