Product Description
Supco part number SHL521.
Gas Furnace Plenum Limit Thermostat.
Specifications:
- Open 100 F
- Close 140 F
- Board Width: 1.88 inches
- Board Height: 2.8 inches
- Insertion Length: 7 inches
Replacement For Brands and Numbers:
- Lennox: 47-21711-04
