Hot surface ignitor question

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Old 11-20-16, 05:26 PM
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Hot surface ignitor question

I've used universal ignitors in the past and need another for my water heater. I've noticed they are available in silicon carbide and silicon nitride versions. Are they completely interchangeable?
 
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Old 11-20-16, 07:47 PM
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The silicon nitride type are rapidly replacing the older style silicon carbide.
I'm not a fan of universal igniters unless I know the specs are exactly the same.

There is one problem that should be noted..... if your appliance uses the igniter to sense the flame.... you CAN NOT replace a carbide type with a nitride due to the composition.
 
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Old 11-21-16, 06:57 AM
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Originally Posted by PJmax
...if your appliance uses the igniter to sense the flame.... you CAN NOT replace a carbide type with a nitride due to the composition.
Thanks Pete--exactly what I needed to know about these newer "universal ignitors". My HWH doesn't have a separate flame sensor so I'll choose a carbide spare.
 
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Old 11-21-16, 08:30 AM
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I looked up the Honeywell "Glowfly" HSI that I installed a few weeks ago in my HWH and it's described as a silicon nitride universal replacement igniter. It works fine. Pete is your information wrong or are some "universal" igniters more universal than others?

I Googled the question and could only find one mention that "our" (nitride) igniters won't work on systems where the igniter is used as a flame sensor.
Honeywell's literature for the Glowfly makes no mention other than it replaces over 100 igniters of both types.
 
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Old 11-21-16, 08:51 AM
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The Glowfly doesn't carry the flame sense warning but some of the universal nitride type do.
 
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Old 11-21-16, 12:11 PM
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What's the difference? And how come I'm not seeing these warnings? It's quite deceptive to leave it out if most won't work.
 
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