Lennox X8792 Insert 321702-401 If the circuit is open

If the circuit is open or resistance is outside factory specs

this is a negative pressure valve designed for DSI (Direct Spark Ignition) or Hot Surface Ignition premix systems

reducing time spent on-site during furnace motor troubleshooting

Common indicators include a humming sound without fan movement

and industrial cooling units

Lennox X8792 Insert 321702-401 If the circuit is openThe Lennox X8792 is a genuine OEM PureAir replacement mesh insert engineered specifically for the Healthy Climate PCO16 28 air purification system. As a veteran technician, you know that maintaining the catalytic surface is non negotiable for system performance. This titanium dioxide coated insert works in direct tandem with UVA lamps to facilitate photocatalytic oxidation (PCO), effectively neutralizing volatile organic compounds (VOCs), household