Aprilaire 600 just installed and showing an error code
We just had a new air conditioning unit and an Aprilaire 600 installed. The humidifier is currently flashing red to contact the dealer. The installer said that it is just because the unit is off for the season and once we have the heat on and set the humidity level, it will no longer flash to contact the dealer. Is this an accurate statement?
Re: Aprilaire 600 just installed and showing an error...
No, it is not an accurate statement.
These units have simple configurations They have a water supply similar to a ice making referigerator, an enclosure connected to your supply duct that houses a prop fan and media, a seperate humidistat and a drain for excess water. Your unit may also include fancy controls including an outside thermometer & humidistat to avoid over humidification that can cause problems during freezing weather. The humidistat looks a lot like a thermostat and is located in your living space or in the return duct. The prop fan in the box pulls air from the duct, through evaporation media and back to the duct. An electric solenoid valve releases water that pours over the media.
If the humidiy is below the humidistat seting and the AC/heater is running, the Aprilaire fan starts and the solenoid valve opens. I suspect the facier controls include the flashing warning light.
The warning light spells problem. Aprilaire's customer service should be able to provide guidance for the homeowner in the form of simple checks. I suspect your contractor is avoiding a warentee call and the trip it requires.
A word of caution. These humidifiers can be powered directly from your air conditioning unit control board from an auxiliary connection. If the control board isn't rated to carry the current required by the Aprilaire fan, valve and controls or the Aprilaire encounters and electrical problem, the board can be damaged. This can be avoided by using a relay. The AC board switches a low energy relay. 120 volt house power is connected to load side of the relay and runs the Aprilaire.
My board cooked at a location near this connection, but I can't be sure that the load from the humidifier caused it since four of our neighbors also lost their board. It failed the evening of a snow storm and required a costly emergency after hours service call. The next day a new board required a three hour drive. Fortunately a fan powered propane heater kept our pipes from freezing.
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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.
Thank you for contacting us with regards to your model 600 Humidifier. The Change Water Panel indicator should flash when the control knob is set to the Test/Reset mode. The flashing indicates that the timer has been successfully reset. However, the humidifier should operate for the first 60 seconds of Test mode as long as your furnace is running. If your humidifier does not turn on, contact your installer. The humidifier may require service. We appreciate the opportunity to be of assistance. Sincerely,
Brett Phillips Technical Support Research Products Corporation
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Aprilaire Humidifier is designed to operate in conjunction with your furnace
blower motor. Most installers wire a humidifier to operate when the furnace is
calling for heat. To determine if your Aprilaire Humidifier is maintaining
proper humidity, turn up the heat temperature 5 degrees above the current room
temperature on your thermostat and set your humidifier control to call for
humidity. The humidifier control is located on the cold air return duct.To set your humidifier control to call for
humidity, turn the control dial to the off position and slowly rotate the dial
until you hear a “click” on the control.You should also hear a click at the solenoid valve located on your
Aprilaire unit.The humidifier control
will have a click point at the current relative humidity level in your home. If
the current relative humidity is 45% or the outdoor temperature is above 60F,
the control will only operate the humidifier in the test mode.
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No click at the solenoid valve indicates
an electrical problem.Contact your
heating and air conditioning dealer to further check the electrical
components of your Aprilaire Humidifier.
The click sound at the solenoid valve
indicates there is electricity to the solenoid valve.By turning the dial of your humidifier
control to a setting above the “click point” you should see water coming
out of the drain line within a few minutes which would indicate your
humidifier is working.
If the solenoid valve makes a click
sound and there is no water draining from the unit, this would indicate
the flow of water is being obstructed.
determine if water flow is being obstructed, turn the dial of your humidifier
control to the off position.The first
location you would want to check for an obstruction would be at the saddle
valve located on the water line supplying water to the humidifier. When
checking the saddle valve, you want to make sure it is completely open.This can be done by turning the valve all the
way to the left.If anything is clogged,
it can be dislodged by turning the saddle valve all the way to the right and
back to the left.Once this is done,
turn the humidifier control dial above the click point and you should see water
coming out the drain line. If water is still not
coming out of the drain, check the orifice and in-line strainer to make sure
they are not clogged.The orifice is
located in the tube on the discharge side of the solenoid valve and the in-line
strainer is located on the inlet side of the solenoid valve. You may clear the orifice by inserting a
needle through the small opening.Clean
the strainer by running it under warm water to dislodge deposits or replace.After clearing and re-installing the orifice
and strainer (be sure to double wrench all water connections), turn the humidifier
control dial above the click point and you should see water coming out the
I have the same type of Aprilaire humidifier unit with automatic temperature sensing control. My unit also displayed the 'E3' code. The HVAC technician was on site today and replaced the temperature sensing unit that is located outside the house. The humidifier is functioning normally once again.
There are 3 things to check on the humidifier.
Check the metal mesh screen, is it wet after the humidistat is call? If it is dry the water solenoid my not be opening or the nozzle is plugged. The circulating fan blows air through the wet screen to add humidity. Does the fan spin when the humidistat is calling? There is an intake and exhaust on the humidifier. Check that the metal was cut out properly when the humidifier was installed to allow air to feely circulate?