International Environmental 70665401 Relay which may result from a

which may result from a dirty air filter

What Trane models are compatible with the GKT1533

but always verify your specific furnace wiring diagram to ensure correct limit switch troubleshooting

This genuine OEM furnace limit switch is standard in Nordyne

International Environmental 70665401 Relay which may result from aThe International Environmental 70665401 Relay is a heavy duty 24V SPDT switching relay engineered for reliable performance in commercial fan coil units and industrial air handling systems. As a genuine IEC replacement part (also referenced as E030 70665401), this component is designed to handle both Normally Open (N O) and Normally Closed (N C) circuits, providing essential versatility for contractors managing complex HVACR control logic. With a