F depending on the specific Honeywell L4080B sub-model conversion)

or refrigerant dilution in the oil

verify the unit's required set point against the HVAC technical specs for your specific elevation

and required aluminum tubing for a comprehensive swap

Clicking without ignition often indicates a cracked ceramic insulator on the electrode or a gap that has shifted out of tolerance

Lennox 48J67 Wire 320819-301 F depending on the specificThe Lennox 48J67 is a 25 inch lead ignition wire engineered for high tension voltage transfer in residential and commercial gas heating applications. Designed as a direct OEM replacement part, this lead is critical for ensuring reliable spark delivery from the ignition control board to the electrode assembly. The 48J67 features high temperature insulation rated to withstand the intense thermal environments within a Lennox furnace cabinet, preventing