This HVAC high-limit safety switch utilizes a 3-inch probe insert for precise sensing of the plenum or trunk air temperature

and Packard

For HVAC contractors

Installation is straightforward for contractors during seasonal preventive maintenance: once the gas supply is isolated and the faceplate removed

If you are servicing Star roller grills

Emerson Alco 027511 Lens Assembly This HVAC high-limit safety switchThe Emerson Alco 027511 Lens Assembly (Model X12978 1) is a critical service component designed for the upkeep and repair of moisture liquid indicators within commercial refrigeration and HVAC systems. When a moisture indicator lens becomes etched, clouded, or develops a leak, replacing the full assembly ensures accurate visual monitoring of refrigerant moisture levels and system charge. This kit includes the precision machined lens assembly, a