What causes the burner to light for 4 seconds then shut down

Reliable thermal protection is essential for preventing furnace short cycling and blower-only operation caused by overheating conditions

Precision Fit: Standard 5/16" ODS connections allow for seamless integration into existing Trane and American Standard refrigerant lines

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

Omron LY4-AC120 Relay R-407A What causes the burner toThe 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