hum when the humidifier is on. Here's the kicker, the vibration goes away immediately when hot or cold water is turned on anywhere in the house, and comes back right away when the water is turned off. I't a whole house unit mounted to the supply plenum. Supply is from the gas hot water heater. No noticeable pipes are rubbing anything structural
Answers & Comments
Please have the selonid valve replaced.The coil is shot.