Ideal furnace shows F10, no ignition, or immediate lockout after call for heat

Safety: Turn off power and gas before accessing the burner compartment. Igniters are fragile and can break easily.

Steps:

• Visual check of igniter: Remove the burner access panel and locate the hot surface igniter on your Ideal furnace. Inspect for cracks or chips. If damaged, it must be replaced with the correct Ideal-specified part.
• Check igniter wiring: Ensure the plug from the igniter to the control board is fully seated and that wires are not pinched or burnt.
• Observe operation: With panels in place, restore power and call for heat. If the igniter never glows, the igniter or control board is likely faulty.
• Replacement: Replacing the igniter is usually straightforward but must be done carefully to avoid touching the element with bare fingers. Follow Ideal’s service instructions or have a technician perform the work.