If your furnace is blowing chilly air or just clicking repeatedly without having actually firing upward, there's a strong chance your norton ignitor model 501a has finally given up the cat. It's one of those parts that you never consider until it prevents working on a Tuesday night within January when the temperature is losing fast. These little bit of components are basically the "spark plugs" of your heating system, and while they're built to end up being tough, they don't last forever.
The Norton 501a is a traditional hot surface ignitor (HSI). Unlike the particular old-school pilot lighting that stayed lit on a regular basis, these points only heat up when the thermostat requires heat. They're more efficient, but because they experience extreme heat changes every period your furnace cycles, they eventually obtain brittle and crack. If you're currently staring at your own furnace wondering why it's not functioning, let's walk by means of what's going upon with this specific part and how you can find things running again.
Just how do you understand it's actually the ignitor?
Prior to going out and purchase a replacement, you would like to be sure that the norton ignitor model 501a is actually at fault. Furnaces are complicated machines with lots of safety changes, so it's simple to get distracted.
The easiest way to check will be a simple visual test. When you change your thermostat up, you should hear the inducer engine (the small fan) start spinning. About 30 to 45 seconds later, you should see a shiny orange or yellow glow coming through inside the burning assembly. If a person hear a "click" but see totally no glow, that's a huge red light.
For the ignitor out and look at it closely, a person might visit a small black smudge or a very thin white line within the gray element. That's usually where the particular internal filament has snapped. It's sort of like a lightbulb; once that connection is broken, the electricity can't movement through, and you won't get any warmth.
The particular science behind the particular glow
It's actually pretty fascinating how this stuff function. The norton ignitor model 501a is usually made associated with silicon carbide. This particular material is developed to have the high resistance from electricity. When the furnace control board sends 120 volts to it, the material resistant to that flow so much that it starts to glow white-hot—we're talking over two, 500 degrees Fahrenheit in an issue of seconds.
Once it strikes that peak temperature, the gas valve opens, the fuel hits that sizzling surface, and poof , you have open fire. Once the fire sensor detects that will the burners are usually lit, the ability to the ignitor is definitely cut off so it can interesting down. This will save energy and stretches the life associated with the part, but the constant enlargement and contraction from that intense high temperature eventually causes the silicon carbide in order to fatigue.
Swapping it out isn't as scary since it sounds
When you've determined the particular ignitor is dead, the good information is that changing a norton ignitor model 501a is really a totally doable DIY project for most homeowners. You don't need a degree in HVAC engineering; you mostly just need a screwdriver plus some patience.
First things first—and I can't pressure this enough— turn off the particular power . Find the switch upon the medial side of your furnace or switch the breaker. You're working with 120 volts here, so you don't want a nasty surprise. It's also a good idea to shut down the particular gas valve just to be extra safe, though it's not strictly required if the energy is off.
As soon as you open the particular furnace cabinet, you'll see the ignitor hidden near the burners. It's usually held in place by one particular or two small screws. Carefully unplug your invisalign aligner wire connection. This is actually the most important rule of the entire process: Do not touch the gray area of the new ignitor with your bare fingers.
Your skin has natural natural oils on it. If you touch that silicon carbide element, those oils will remain on the area. When the ignitor gets hot to thousands of degrees, those oils make a "hot spot" that causes the material to crack almost instantly. I've observed brand-new ignitors burn out in much less than each day simply because someone touched them during installation. Use a clear cloth or simply handle it simply by the ceramic foundation.
Why perform they fail to begin with?
You might be wondering precisely why your norton ignitor model 501a unsuccessful now. Usually, it's just age. Most of these parts have a lifespan of about 3 to 7 years, based on how usually your furnace process. If your house is poorly insulated and the furnace is constantly turning on and off, the particular ignitor is heading to wear away much faster.
However, there are a few other issues that can kill an ignitor earlier. High humidity in a basement can trigger the material in order to degrade. Also, in case your furnace will be located near a laundry area, the particular fumes from bleach or fabric softeners can actually react using the hot element and shorten the life. If a person find yourself replacing this part every single single year, a person might have a good airflow issue or even a problem with the control board sending as well much voltage.
Picking the proper substitute
When you're looking for a replacement, you'll observe a large amount of "universal" ignitors out there. While several of them function fine, there's grounds people specifically look for the norton ignitor model 501a. This specific model has a particular bracket shape and wire duration that fits completely in older Trane, American Standard, plus York units, amongst others.
In case you buy the generic one, you might find your self struggling to get the screw holes to line up, or even the wires could be too short in order to reach the plug. It's usually worth the extra 5 or ten bucks to get the particular exact match. It just the actual job so much softer, and you won't have to worry about the position being off, which usually can result in "delayed ignition" (that frightening growth audio when the gas builds up too long before lighting).
Testing the fix
As soon as you've got the particular new norton ignitor model 501a screwed in and plugged back in, it's time for the moment of truth. Put the furnace doors back upon (most furnaces have a safety switch that won't let it run with the particular door off) plus flip the power back again on.
Convert your thermostat up and wait. You should hear the particular fan, then—if you peek through the particular little sight glass—you'll observe that glorious red glow. A few seconds later, the particular burners should roar to life. When it works, give yourself a terry on the back. You simply saved your self a $200 or $300 service contact from an HVAC tech.
The few last-minute tips
If you've replaced the ignitor and you nevertheless don't see the glow, don't panic. Check your contacts again. Sometimes all those plastic plugs don't click in just about all the way. Furthermore, make sure your thermostat is actually calling for temperature. If the heater still won't actually try to shine, you might have a broken fuse on the particular control board or a faulty pressure switch.
It's also not the bad idea to keep an extra norton ignitor model 501a in a cabinet somewhere. Since they always seem in order to break at the worst possible time—like on Christmas Eve or even during a blizzard—having one on hands can change a potential disaster in to a 10-minute fix. They're fairly cheap, and the peacefulness of mind is usually definitely worthwhile.
Taking care associated with your furnace doesn't always require the professional. Sometimes, it's just about knowing which part is acting up and having the confidence to swap it out. The 501a is really a workhorse, plus with a little treatment during the set up, it'll keep your home warm plus toasty for a number of more winters in order to come. Just remember: maintain your hands away the element, and always double-check that will power switch!