Thermocouples, which detect flame presence, require precise calibration. If the pilot light extinguishes frequently, check for a faulty Thermocouple—its tip should glow red when heated. Clean the Igniter’s electrode tip with fine-grit sandpaper to remove residue that prevents sparking. For Hot Surface Igniters, ensure the ceramic body isn’t cracked, as moisture ingress can cause failure.
Always test electrical connections for corrosion or loose wiring. In gas furnaces, improper grounding can disrupt ignition sequences. Replace components only with OEM parts to maintain compatibility. By addressing these common issues, technicians ensure Igniters, Hot Surface Igniters, and Thermocouples function reliably, minimizing service calls and enhancing user safety across residential and commercial applications. Regular inspections and proactive maintenance extend system life and prevent hazardous failures.
