This poppet-type pressure relief valve is specifically designed for residential applications

Durable Construction: Features a high-strength cast iron body and stainless steel internals for superior erosion resistance

or port blockage from internal rust and scale that impedes the pressure switch signal

It features integrated timing logic to prevent excessive frost buildup on the outdoor coil

Trane LNK0271 Fusable Link 318172-701 This poppet-type pressure relief valveThe Trane LNK0271 is a critical safety component designed for high limit thermal protection in residential and commercial air handlers and furnaces. As a 218 degree Fahrenheit fusable link, this part serves as a non resettable thermal cutoff, engineered to interrupt the electrical circuit if internal temperatures exceed safe operating parameters. For veteran technicians, accuracy in cross referencing is essential; the Trane LNK0271 Fusable Link is