Most Common Reason Furnace Won't Turn On - Furnace Not Working - Furnace Starts Then Shuts Off

Описание: Most Common Reason Furnace Won't Turn On - Furnace Not Working - Furnace Starts Then Shuts Off

Product Links:
Hot Surface Ignitors:
Coleman/York/Goodman/Evcon/Luxaire: https://amzn.to/4gaFwQA
Rheem Ruud: https://amzn.to/3Tdo5ER
Carrier/Bryant: https://amzn.to/4g2jRKl
Trane/American Standard: https://amzn.to/3yZ2CsB
Trane: https://amzn.to/4cVudZn

Chapters:
00:00 - Furnace Starts Then Shuts Off
00:27 - Identifying Internal Furnace Parts
01:04 - The Most Common Problem
01:54 - How to Replace Hot Surface Ignitor
03:44 - Final Notes on Furnaces

If your furnace is turning on then quickly turning off without creating any heat... watch this short video and I'll explain what to look for as well show you an easy fix if you've prepared yourself for this type of situation. Typically, a flashing LED indicator will correspond to an error code found in the user manual. But oftentimes, it's a vague description of the problem.

The best thing to do is familiarize yourself with the different furnace parts. In my furnace, the 3 small round disks are pressure switches. And there's a vacuum tube that helps operate these. If there's a clog in the air tube, a motor that won't turn on or a problem with any of these switches, the furnace won't run. Typically at the bottom you'll find the gas burners. And in the back is the flame sensor. This detects if the burners are on. If there's no flame, the furnace will shut off to prevent gas fumes from entering your home. In all my years as a homeowner, I've never had issues with the pressure switches or flame sensor.

The most common problem why a furnace suddenly won't run is the ignitor. And it's located in the back in the direct path of one of the gas burners. This is called a hot surface ignitor and it's a very user serviceable part. From past experience, I've learned to keep a hot surface ignitor on hand for furnace emergencies because I don't want to get stuck with without heat in the winter.

I'll list several hot surface ignitors here in the description so it's easy for you to find. An ignitor has two wires attached to a snap on connector. A brand new ignitor has an even color along its surface. But be careful never to touch the gray filament with your fingers.

Replacing a burnt out ignitor is almost as simple as replacing a light bulb. First, shut off power to the furnace. Then detach the ignitor's wire connector. At this point the ignitor can be unmounted and lifted out. My ignitor has been in use several years and there's a lot of discoloration because it heats up red hot every time to ignite the gas flowing from burners. You can usually find the replacement model number on the connector or an attached tag. If an ignitor burns out you'll clearly see a break in the filament and more discolorations.

A new hot surface ignitor averages around $35 so it's definitely worth keeping an extra one on hand for your specific furnace. Calling a repairman for this simple repair could cost you several hundred dollars plus an emergency surcharge. Unfortunately, if it's the middle of winter and your furnace isn't running, your quickest option to restore your heat is to call a repairman.

But in the future, if you've prepared yourself ahead of time, you could restore your heat yourself in a matter of minutes. A hot surface ignitor burns out just like a light bulb so plan ahead and keep one on hand for emergencies. When it's all done, flip the breaker back on and the furnace should run like normal again.

And here's a few things I want to emphasize. Do not touch the filament on the ignitor with your fingers. The oils on your hand will shorten it's life and cause it to burn out much faster. Also, these ignitors are not typically available to purchase locally by consumers. I actually found that out the hard way a few years ago. So check the items in my description to find the right ignitor for you. And lastly, another user friendly part is the flame sensor. This can easily be removed and checked. If there's a lot of corrosion on it, take a piece of steel wool to scrape it off and then reinstall it.

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