or the boiler failing to pre-purge

a different valve configuration is required

protecting contactors and compressors from rapid cycling

As a critical part of the combustion system

How do I test a 33265 sequencer with a multimeter

Aaon R51280 Limit Switch Els PW 29614 or the boiler failing toThe Aaon R51280 Limit Switch is a critical safety component engineered for precision temperature monitoring in high performance HVAC systems. This 3 inch L195 30F limit switch features a fixed temperature setting designed to open the electrical circuit at 195F and automatically reset when temperatures drop by 30F. As a vital HVAC high limit control, it prevents equipment overheating by interrupting power to the heat source if airflow is restricted or