Johnson Controls T-4000-3145 Plastic Cover Ensure the setting matches the

Ensure the setting matches the furnace manufacturer's original safety limit specifications to prevent overheating or nuisance tripping

Replacing the venturi gasket during any combustion blower service is recommended to ensure a secure seal

When the valve disc and seat face show signs of Wire-drawing or erosion

ensuring exact L270-20F temperature calibration

Designed with high-conductivity silver alloy contacts

Johnson Controls T-4000-3145 Plastic Cover Ensure the setting matches theMaintain the integrity of your pneumatic control systems with the Johnson Controls T 4000 3145, a professional grade replacement vertical plastic thermostat cover. Designed specifically for the legacy T 4000 series, this white thermostat cover plate features a clean, high impact plastic construction that protects sensitive pneumatic sensing elements from ambient dust and physical impact. As a genuine OEM Johnson Controls replacement part, it ensures a