If your furnace or HVAC system is acting up, it might be the limit switch. This Supco SHL508 is a direct replacement for several brands, including Bryant, York, Trane, Lennox, Carrier, and Payne. It's a plenum limit thermostat that opens at 190°F and closes back at 170°F, helping prevent overheating and keeping your system safe.
The switch is panel-mounted and has normally open contacts. The board measures about 1.88 x 2.8 inches, with an insertion length of 3.12 inches. Before buying, check your old part number—this replaces common ones like P331-2005, HH12ZB190, SWT1260, and others listed.
Installation is straightforward if you're comfortable with basic wiring. Always turn off power before working on your HVAC system. Once installed, this switch helps regulate temperature and protect your equipment from damage. Keep your heating system reliable with a quality replacement part that won't break the bank.
