Mike PleziaInside service technician, Clark Associates · Commercial Equipment, HVAC, and Refrigeration professional

Check your heat exchanger and fan

10 Oct 2024 · 1 min

Watch on YouTube

1:00

In this instructional video, the presenter demonstrates a furnace maintenance procedure by fully removing the fan motor to inspect the heat exchanger. He highlights the importance of checking for moisture accumulation and superficial rust on the heat exchanger, which can lead to corrosion. The video also shows how to assess whether the secondary heat exchanger in high‑efficiency furnaces is clogged, and explains that removing the motor provides access to clean the fan wheel, removing dust and extending the blower motor’s lifespan. The presenter delivers the guidance in a conversational, hands‑on style, emphasizing practical steps for HVAC technicians and DIY homeowners.

Chapters

Hey, can you guess where I am? I'm inside your furnace. No, not really. So here's another one for you newer techs. If you're doing maintenances, it's a good idea to completely pull your fan motor out so you can see underneath what the heat exchanger looks like. Moisture is going to settle down there, and that's another good spot for you to start forming rust. As you can see on this one, yeah, we got a little superficial rust, On the bottom. Not too bad. She's an oldie but a goodie. Also a good way to check to see if your secondary heat exchanger is clogged on your high-efficiency furnaces. The other thing is, you know, it enables you to clean that fan wheel, get all the dust off, which prolongs the life of the blower motor, of course. All right, I need to go un-contort myself out of this pretzel shape that I've