Hello, the most common reason this happens is because the solenoid valve is bad and remains open allowing water to flow continously regardless if the furnace is on or off. I assume you have either a sail switch or current sensing relay energizing the humidifier when the heat is on, if not thats another reason it would run continously.
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Hello, the most common reason this happens is because the solenoid valve is bad and remains open allowing water to flow continously regardless if the furnace is on or off. I assume you have either a sail switch or current sensing relay energizing the humidifier when the heat is on, if not thats another reason it would run continously.