Our catalog lists the White Rodgers 768A-815 silicon nitride hot surface ignitor as the replacement for 768A-15. Check the numbers on your old igniter before you swap it.
The part that replaces it
- 768A-15
- Volts are the same. Most furnace igniters run on 120 V. Some use 80 V. They are not interchangeable.
- Same type of element. Silicon nitride igniters last longer. Use the type your furnace lists.
- It fits the same bracket. The mount and the plug must fit your burner. Compare with your old igniter.
What a hot surface igniter does
When the thermostat calls for heat, the furnace powers the igniter until it glows. Then the gas valve opens and the burners light. If the igniter is cracked, it may not glow at all, and the furnace stops after a few tries.
Igniters come in two common materials. Silicon nitride igniters last longer than silicon carbide igniters. The 768A-815 listed here is silicon nitride.
Why this part is listed for 768A-15
The 768A-815 product lists 768A-15 among the numbers it replaces. That is the only fit data we use for this page. We do not guess a fit from looks alone.
What to match on your old igniter
- Volts: most furnace igniters run on 120 V and some use 80 V. They are not interchangeable.
- Material: silicon carbide or silicon nitride, as your furnace lists.
- Shape and mount: the new igniter must fit the same bracket and plug.
Install notes
Take a photo of the wires and the bracket before you remove anything. Hold the new igniter by its base, never by the element. Mount it in the same spot, reconnect the plug, then restore gas and power and watch one full start.
How to confirm it fits
- Find the part number on your old igniter or its box and confirm it reads 768A-15.
- Check the voltage. Most furnace igniters run on 120 V and some use 80 V.
- Check the element type. Use the type your furnace lists.
- Compare the base, the bracket holes and the plug with your old igniter.
- Not sure? Hire a licensed HVAC technician to confirm before you install it.
Questions
What part replaces 768A-15?
Our catalog lists the White Rodgers 768A-815 silicon nitride hot surface ignitor as the replacement for 768A-15. Match the volts and the mount with your old igniter first.
Can I use an 80 V igniter instead of a 120 V one?
No. Most furnace igniters run on 120 V and some use 80 V. They are not interchangeable, so use the voltage your old igniter lists.
Why should I not touch the igniter element?
Igniters are brittle and skin oil can shorten their life. Hold the part by its ceramic base when you install it.
What if I smell gas while working?
Do not touch any switch. Leave the house and call your gas company from outside.
Related guides
Brand names and part numbers are used only to show fit. HVAC Fitter is not affiliated with, authorized by, or endorsed by any equipment maker. If you are not sure a repair is safe for you, call a licensed HVAC technician.