Key Benefits Evaporator Protection: Specially formulated to be safe for nickel and tin-plated evaporators

Reference the compressor’s data sheet or the electrical diagram on the terminal cover

maintaining the manifold pressure and thermal output intended by the manufacturer

Common Questions How do I know if the limit switch has tripped

Replacing a manual reset furnace limit with an automatic one can lead to dangerous short-cycling and equipment failure without the root cause being identified

Maxitrol 12A39 Vent Limiter Key Benefits Evaporator Protection: SpeciallyThe Maxitrol 12A39 Vent Limiter is a critical brass gas regulator accessory engineered for indoor gas pressure regulator installations where piping a vent line to the outdoors is impractical or prohibited by code. This 3 8" NPT automatic vent limiter features a precision machined ball check valve mechanism that permits free inhalation for sensitive diaphragm movement during normal operation but limits gas escape to within ANSI Z21. 80 and ANSI Z21. 18