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typically used with 1-1/4 inch nominal copper tubing (Type L or M)
allowing it to function at zero differential pressure
making it a standard choice for contractors requiring a high-limit or safety-interlock pressure switch
fail-in-place performance during power interruptions
Lennox 75W43 Thermal Switch 320788-703 typically used with 1-1/4 inchThe Lennox 75W43 is a high precision compressor thermal switch engineered for critical temperature regulation in industrial and residential HVACR systems. As a genuine OEM component (Manufacturer Number 103048 01), this HVAC thermal protection switch prevents catastrophic equipment failure by monitoring operational heat levels. It features a specified open temperature range of 239F to 257F, which interrupts the electrical circuit to protect the
US$ 10.00
US$ 10.00
US$ 14.60
US$ 14.99
US$ 13.20
