the internal bimetal disc is likely warped

Does this include the relay module

010-inch tolerance is easily damaged

Durable Construction: Manufactured from chemical-resistant black plastic to resist staining and wear from tea tannins

Designed to facilitate rapid mounting on a standard 35mm DIN rail

Aprilaire 4001 Saddle Valve the internal bimetal disc isThe Aprilaire 4001 Saddle Valve is a heavy duty self piercing needle valve designed for tapping into copper water lines to supply whole house humidifiers. This component is the direct replacement for 32001616 001 and is compatible with the majority of bypass and power humidifier models, including the Aprilaire 400, 500, 600, and 700 series. Engineered for 1 4 inch OD tubing, this HVAC water line tap ensures a leak resistant connection to cold water