Trane SWT1276 Limit Switch the 10-166 is dedicated to

the 10-166 is dedicated to 1/4" tube sizes to ensure the correct compression fit within the 1810 series pilot burner body

OEM Compatibility: Designed specifically as the Nordyne 631132 replacement

dirty filters

this 10-043 is a universal type gas orifice designed to handle both fuel types

Technically

Trane SWT1276 Limit Switch the 10-166 is dedicated toAs a seasoned tech, you know that keeping a furnace from over firing starts with a reliable safety circuit. The Trane SWT1276 is a professional grade 110 140F Auto Limit Switch designed to protect the secondary heat exchanger and surrounding components from thermal runaway. This OEM Trane replacement part features a fixed 140F high limit trip point and an automatic reset that closes the SPST normally closed (NC) circuit once the plenum temperature