Lennox 21L98 Ignitor Electrode the TOCFD505 is built to

the TOCFD505 is built to withstand extreme operating conditions

Specified for 60Hz applications

while EK-053 refers to the Alco model prefix for a 5 cubic inch drier with 3/8" flare fittings

Technicians typically look for audible clicking without component activation

As a veteran technician

Lennox 21L98 Ignitor Electrode the TOCFD505 is built toThe Lennox 21L98 Ignitor Electrode is a critical furnace component designed for precise direct spark ignition (DSI) sequences in high efficiency residential and commercial units. This genuine OEM part, which is cross referenced and identical to Lennox 21L9801, ensures the correct spark gap and flame rectification required for consistent burner light off. Unlike generic alternatives, the 21L98 is engineered with high grade ceramic insulation to prevent