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Re: 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.
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You gotta remember that the 700 also has a fan that blows air through the water filter/grate. The fan could have a warped blade and thus vibrates when rotating. Although there could be nothing wrong with this unit at all as it is not unusual for any solenoid to vibrate when it's engaged. Could could replace it if you'd like. EBay is your best source. But your posture should really be 'if it ain't broke, don't fix it.
Sorry to read about your problem, I hope this helps you out. did you hit the reset
Digital Humidifier Control (Model 700): (Automatic or Manual mode) Check system operation and reset Change Water Panel indicator by setting the knob to "Test/Reset". With HVAC blower operating and HVAC calling for heat, humidifier will operate for one minute. DO NOT LEAVE IN TEST MODE AS HUMIDIFIER WILL NOT OPERATE.
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Aprilaire, a manufacturer of indoor air quality products including thermostats, air cleaners and dehumidifiers, also offers a line of whole house humidifiers. Installed in your existing heating and cooling system, humidity is produced by a supplied water source that flows over a water panel before being distributed throughout your air through the heating and cooling system. Issues you may need to troubleshoot with your Aprilaire humidifier include error messages and the unit producing too little or too much humidity.
Things You'll Need:
Replacement water panel
Turn down the control dial by one setting if condensation appears on your windows or walls.
Turn up the control dial by one setting if there is a lack of humidity, often indicated by dry skin or peeling wallpaper or paint.
Turn the control dial to "Test/Reset" if the humidifier does not run. Verify the heating and air conditioning unit blower is operating. If the heating and air conditioning unit is not operating or you are unable to resolve the issue contact a heating contractor.
Contact a heating contractor if you turn the control dial to "Off" and the humidifier continues to run.
Contact your Aprilaire dealer (see Resources) if you notice an error code on the display and the "Call Dealer for Service" light flashes.
Turn the control dial to "Off" and turn off the water supply if the yellow "Change Water Panel" light flashes. Lift the front panel off of the humidifier. Slide out the water panel. Insert a new water panel. Replace the front cover. Turn the control dial to "Test/Reset" until the "Humidifier On" light flashes. If you feel uncomfortable changing the water panel, contact a heating contractor.
Tips & Warnings
Purchase replacement water panels through your Aprilaire dealer or a heating contractor.
Thanks for your Question, Sounds to me like you have a calcium build up in the Solenoid, which is restricting flow to the unit for proper operation, you might even have a bit of restriction in the copper line feeding the Solenoid, replacement of the solenoid would probably take care of your problem, one quick tip, in the spring and summer months, its a good idea to shut the water off to the unit, this should make the Solenoid last a little longer, hope this was helpful to ya, please let me know, thanks again, mr.grzz
The reset is to place the controller in the "test/reset" position. The furnace must be in heat mode and operating at the time. The green light will blink for about 1 minute if operating properly, then cut off when placed in a normal setting.
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