it reliably communicates with the furnace control board to prevent hazardous operating conditions due to blocked vents or failed inducer motors

checking the run capacitor is your first move

the NRV 10S is rated for hot gas discharge lines

Gasket integrity depends heavily on thermal cycling and annual maintenance schedules

What are the symptoms of a failing gas valve

Omron LY4-AC120 Relay R-407A it reliably communicates with theThe Omron LY4 AC120 is a heavy duty 4PDT power relay engineered for demanding industrial HVACR applications and control panels requiring high switching capacity. Operating on a 120VAC coil voltage, this general purpose relay features a 10A contact rating capable of handling inductive and resistive loads across four poles. The plug in solder terminal design provides versatile installation options, while the integrated standard bracket mounting ensures