I show how to replace the solenoid on a whole house humidifier. The 4040 24 volt humidifier solenoid valve is compatible with a wide range of whole house humidifiers. Check the label on the old solenoid valve before purchasing a new solenoid valve for compatibility. Here is a link to this solenoid and a list of replacement part numbers https://www.amazon.com/dp/B08X1M2R6W

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