because this model uses Polyolester (POE) oil

The Trane VAL9034 is an OEM-grade 2-stage gas valve engineered for high-efficiency natural gas furnaces and light commercial HVAC units

Replacing a failed circuit board with this genuine Lochinvar 100293702 restores communication between the user interface and system sensors

a 2-pole contactor can replace a 1-pole unit to provide total circuit isolation by breaking both "hot" legs of the power supply

adjustable from 2

Carrier 338096-709 Limit Switch 318820-201 because this model uses PolyolesterThe Carrier 338096 709 Limit Switch is a critical safety component designed for high performance thermal regulation in forced air furnaces and industrial HVAC equipment. This L215 20F limit switch features a primary temperature trip point of 215F with a 20F differential, ensuring the HVAC high limit reset activates effectively to prevent heat exchanger damage or unsafe operating conditions. As a genuine OEM Carrier part, it is engineered for precise