verifying the continuity of this switch is a standard diagnostic step

System Protection: Reduces the risk of damage to the gas control valve and tank components caused by abnormal heat accumulation

using a genuine Nordyne furnace part like the 632493R maintains the equipment’s factory-spec safety ratings and helps prevent premature component failures

Dielectric Integrity: Premium ceramic insulation ensures the high-voltage pulse reaches the electrode tip without parasitic loss

including the UDAP and UDAS series

ZoneFirst ZPS Zone Plenum Sensor verifying the continuity of thisThe ZoneFirst ZPS Zone Plenum Sensor is a critical duct mounted sensor designed for accurate supply air temperature monitoring in both residential and commercial HVAC zoning systems. This plenum rated temperature sensor integrates directly with MasterZone control panels to safeguard the heat exchanger and cooling coil. By providing real time data to the panel, the ZoneFirst ZPS prevents equipment damage caused by excessive heat or freezing