Trane THT2436 Limit Switch or an audible humming sound

or an audible humming sound from the outdoor unit without ignition

the 60-7658-05 is built with additional metal reinforcement on all mounting surfaces to prevent fatigue and maximize torque transfer in high-static pressure applications

this direct-mount linkage kit ensures optimal torque transfer and eliminates mechanical slop in floating control and non-spring return applications

this MARS 12790 50/5 MFD 440VAC unit is engineered for continuous duty in demanding environments

Trane THT2436 Limit Switch or an audible humming soundThe Trane THT2436 is a mission critical HVAC high limit switch designed for furnace temperature regulation and system safety. This OEM Trane replacement part serves as the direct successor for the legacy 1NT21L 2163 model. Engineered as an automatic reset limit switch with an SPST (single pole, single throw) configuration, the device is calibrated to open the circuit at 170F and automatically re close once temperatures drop back to 140F. This precise