Carrier HH18HA226 Rollout Switch 322056-301 A healthy Lennox ignitor should

A healthy Lennox ignitor should typically read between 39 and 70 ohms

On-board LED diagnostics simplify troubleshooting by providing clear flash codes for system faults

187" quick-connect) compatible with SH2B series sockets for secure

When performing a commercial HVAC heat exchanger replacement

Carrier HH18HA226 Rollout Switch 322056-301 A healthy Lennox ignitor shouldThe Carrier HH18HA226 Rollout Switch is a critical safety component designed for Carrier, Bryant, and Payne gas furnaces. Engineered to detect flame rollout conditionswhere burner flames escape the heat exchangerthis Single Pole Single Throw (SPST) switch protects the heating unit and surrounding structure from high temperature damage. This specific model triggers an open circuit at 320 degrees F, immediately interrupting the gas valve circuit to stop