Lennox 14A53 Pressure Switch 319848-301 This direct spark ignition assembly

This direct spark ignition assembly creates the initial arc and then remains in the flame path to provide the microamp signal back to the integrated furnace control board (IFC)

or significant frost buildup on the expansion valve body or distributor tubes

Engineered for intermittent pilot ignition systems

When troubleshooting a furnace pressure switch error or ignition failure

ensuring quiet operation and long-term mechanical stability in Carrier

Lennox 14A53 Pressure Switch 319848-301 This direct spark ignition assemblyThe Lennox 14A53 Pressure Switch is a critical safety component designed for two stage gas furnaces, specifically engineered to monitor dual pressure thresholds of . 40" WC and . 70" WC. As a vital furnace draft inducer switch, it ensures the combustion blower is moving sufficient air to clear flue gases before ignition occurs. This dual stage pressure switch prevents hazardous operation by opening the electrical circuit if the static pressure falls