Nordyne 626417R Limit Switch 321702-401 allowing the ignition sequence to

allowing the ignition sequence to continue

including the pneumatic 4-inch and 8-inch models

A standard single flash typically indicates normal operation (heartbeat)

verifying the furnace heat exchanger price and compatibility with the specific model number is essential

Nordyne 626417R Limit Switch 321702-401 allowing the ignition sequence toAs a technician, you know that a tripped Nordyne 626417R Limit Switch is often the only thing standing between a routine heat cycle and a cracked heat exchanger. This OEM Nordyne furnace part is a critical high limit safety control designed to monitor internal plenum temperatures. If the heat exchanger exceeds safe operating parametersoften due to restricted airflow from a clogged furnace filter or a failing blower motorthis switch opens the circuit