Furnace – Ignitor Testing | Repair and Replace

Furnace – Ignitor Testing | Repair and Replace


Hi, I’m Vance and welcome back
to Repair and Replace. I’ll show you how to replace the hot
surface igniter in a gas furnace. This is one of the most common points of failure
and it can easily be tested before replacing. Hot surface igniter works similarly
to an incandescent light bulb. As electricity flows to the element
the resistance in the material generates heat, which causes the gas to ignite. Over time the igniter can burn out
and may appear singed or cracked. Now this can be difficult to see as even a
small break can cause the igniter to fail. If the inducer motor runs
But the igniter doesn’t glow, then it’s best to test the igniter
for continuity before replacing. To begin you’ll need a hot surface igniter,
a screwdriver or nut driver and a multi-meter. Now there are a few different styles of
igniters available each with a different shape and size. So visit our website to find the
right replacement. Also, be aware that there are no returns or
refunds on electronic items once installed. So, you may want to consult a trained
professional before purchasing. When working on your furnace always
shut off the power and close the gas valve. Remove the top cover panel. Many furnaces use a push lock
or twist lock, some furnaces will require
a screwdriver or socket wrench. Trace the gas line up to the burner,
the igniter should be on this side. In some furnaces it’ll be hidden behind a cover. Now disconnect the wires. Next unscrew and remove the igniter,
but be careful not to touch the element. Take the multi-meter and
set it to the lowest Ohms of resistance. Now touch the probes to each terminal. if the igniter has continuity your multi-meter
should read anywhere from 30 to 200 Ohms. If there is no reading on the
multi-meter or just a slight change, then there is no continuity,
and you will have to replace the igniter Align the new igniter and
tighten the screw. Now reconnect the wires. Now replace the upper cover. Next open the gas valve, Now turn on the power to your furnace. The furnace should be running normally. If you’re still unsure what’s
causing the problem in your furnace, Then watch our troubleshooting guide
for a step-by-step breakdown, and there’s a link to this in
the description below. If you found this video useful
then Subscribe to our Channel. We’re constantly filming
new content every week, so let us know what repairs
you’d like to see next. And if you need a part for that
repair then visit our website. We stock thousands of hard-to-find parts,
and we’ll ship it out to you the same day. Thanks for watching!

Eugene Islam

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