Always ensure the mounting flange is free of old gasket debris

Key Benefits for Technicians Universal Brand Compatibility: Direct-fit replacement for Heil

often caused by a restricted air filter

or a cracked heat exchanger causing abnormal heat distribution

Can this be used for vacuum pump manifolds

Carrier HH18HA452 Rollout Switch Always ensure the mounting flangeThe Carrier HH18HA452 Rollout Switch is a critical safety component designed for furnace flame rollout protection in high efficiency gas fired heating systems. This SPST (Single Pole Single Throw) limit switch is engineered to open the electrical circuit when it detects excessive heat concentrations, indicating a potential draft issue or heat exchanger compromise. Operating with a fixed temperature trip point of 250 degrees F, this manual reset