or the burner failing to ignite due to the control circuit not closing

Common Technical Questions: How is the HT32CH220 wired

the HK35AA009 is the current OEM substitute for both the HK25AZ070 and HK25AZ080

ensuring bolt-hole alignment and flow capacity

this transmitter is strictly designed for non-corrosive inert gases and dry air

Lennox 56W21 Limit Switch 318820-201 or the burner failing toThe Lennox 56W21 Limit Switch is a critical safety component designed for precise thermal monitoring in high efficiency furnaces and air handlers. This L160 30F limit switch is engineered to open the electrical circuit at 160F on a temperature rise and feature an automatic reset once the plenum cools to 130F. As a veteran grade HVAC replacement part, it is a direct match for the Lennox 46105 002 and is compatible with a wide array of Allied Air brands