resulting in no heat production despite proper airflow

Is the Watts 0121499 interchangeable with the 174A-1-100

The Lennox 15M44 is a professional-grade flame rollout switch engineered to provide critical safety monitoring in gas-fired residential and commercial heating equipment

Industrial Build Quality: Features a robust sleeve bearing design to handle the thermal stress of modern high-efficiency furnaces

using a genuine 100109300 burner kit is essential for maintaining the integrity of the FVIR system

Fenwal 05-129608-636 Cable 320074-702 resulting in no heat productionThe Fenwal 05 129608 636 is a professional grade high voltage ignition cable engineered for reliable spark delivery in demanding HVACR and industrial burner applications. This 36 inch ignition lead features a high dielectric insulation jacket designed to withstand extreme thermal cycles and prevent voltage leakage or corona discharge, which are common causes of ignition failure in gas fired systems. Terminated with dual spade connectors, this assembly