Fan and water does not work on aprilaire 700 - Aprilaire 700 Humidifier

SOURCE: Humidifier control .

if humidifier was wired into thermostat circuit for power instead of seperate transformer , this can happen. you need to see if you voltage going to the solenoid valve. if you do , and it isn't opening, the valve is bad . this is assuming that it is using a # 50 relay to come on only when the fan runs . . make sure the water valve is open

SOURCE: Aprilaire 700 Humidifier not working. Can it be repaired?

turn the humidistat back up, aand make sure if is still wired up.

SOURCE: Aprilaire 700 using too much water-------

There is a small oriface that is installed next to the solenoid valve. It sounds like this oriface is missing. It reduces the water flow through the humidifier when it is working properly. You should be able to disassemble the solenoid fittings to check and see if the oriface is in the water line. For a "temporary" fix regulate the water pressure down by closing down on the saddle valve.
Good luck
HVAC Teacher

SOURCE: I have an Aprilaire 700 that is leaking at the

Most likely you have too much water going to the unit you may have to throttle down the water valve that is tapped into the domestic water source. Also check to see if the tray is in the spud going to the drain

SOURCE: i have aprilaire 700 humidifier, running nonstop

Hi check out the stat is working also check water line valve is not stuck open or there is some thing stuck on the seating