Lennox 71J07 Limit Switch 5 Regulator is a rubber

5 Regulator is a rubber seat poppet model engineered for high-precision control in main burner and pilot load applications

you must ensure the control circuit provides a stable 24V DC signal to avoid chatter or failure

streamlining inventory for service calls

furnace short cycling or a 6-flash error code on the integrated furnace control (IFC) often points directly to a fouled or failing HVAC flame probe

the 1E78-144 is primarily battery-powered

Lennox 71J07 Limit Switch 5 Regulator is a rubberThe Lennox 71J07 Limit Switch is a high precision, normally closed safety component designed for critical temperature regulation in heating systems. Engineered by Therm O Disc (Model 36TX11, 36T series), this disc style limit switch features an automatic reset function that ensures seamless system recovery once temperatures stabilize. With an open temperature threshold of 175F and a close temperature of 155F, this L175 20 limit switch effectively