What is up with the message FR Heating on my Aprilaire model 8463?

Monday, February 13, 2012 by Aprilaire Team
Consumer question:

I have an Aprilaire thermostat model 8463 and I have not been able to find any information regarding messages displayed in the Message Center. What are the message FR Heating, and FR telling me?

Aprilaires' response:

Thank you for contacting us regarding your Aprilaire Thermostat.

This is a common question we get in. The FR is a reference to the current day
MO- Monday
TU- Tuesday
WE- Wednesday
TH- Thursday
FR- Friday

The "heating" is just indication that an active call for heat is being made.

Let us know if you have any more questions.

My Aprilaire thermostat model 8346 unit shuts off, after I hit reset, a code of 11 displays

Sunday, February 12, 2012 by Aprilaire Team
Consumer question:

My Aprilaire thermostat model 8346 unit shuts off, after I hit reset, a code of 11 displays

Aprilaires' response:
Thank you for contacting us with regards to your model 8346 Thermostat. If the Reset button does not restore normal operation, and if you've tried replacing the batteries, something is likely wrong with the thermostat. It may have suffered a static shock that damaged the components on the circuit board. If the unit was installed in 2009, we would recommend that you contact your installer for a replacement model.

Please let us know if you have any further questions.

What does the Heating icon on my Aprilaire thermostat model 8363 mean?

Thursday, February 9, 2012 by Aprilaire Team
Consumer question:

Owner's Manual of my Aprilaire model 8363 thermostat does not reference the "Heating" icon on display. The Safety and Installation Manual seems to imply that when "Heating" appears on screen, there may be a problem. System and t-stat appear to be ok. Problem or not?

Aprilaires' response:

Thank you for contacting Aprilaire regarding your Aprilaire product.

The "heating" icon you reference is only an indication that the thermostat is attempting to turn on the heat. If this icon were to be flashing and there was no heat being produced, there may be a problem with the heating equipment, the furnace. Otherwise there is no problem.

My solenoid is open with no voltage, what's up with that?

Tuesday, January 24, 2012 by Aprilaire Team

Consumer question:

I have a 560 humidifier with a model 883321B controller. The past 6 years we owned the house we never used the humidifier but now we are trying to use it. We recently had a evaporator coil and new thermostat installed and the installer ran new wiring for it. When I tried to run the humidifier, water continually runs weather the furnace is on or off and no matter what the humidistat is set to. There was no voltage at the solenoid valve when I checked.

Aprilaires' response:

Thank you for contacting us regarding your model 560 humidifier. When the unit is wired properly, the solenoid valve should only open when the furnace and HVAC blower is running. If there is no voltage at the solenoid and it is open, then the valve may be stuck open due to a build up of particles or sediment.

In order to send you to correct wiring diagram, we would need to know if you have a manual or automatic humidistat. Additionally, to better understand why your unit is not operating properly, you have the option to call our technical support department at 1-800-334-6011 to troubleshoot the unit with one of our technicians over the phone. The technician may be able to diagnose what the problem is and point you in the right direction regarding service or installation manuals.

Our tech support department is available Monday through Friday, 7 am to 5 pm CST.

Where is the humidity sensor on my humidifier?

Thursday, December 29, 2011 by Aprilaire Team
Consumer question:

We have a manual control for our Aprilaire Humidifier that is located in the same room as the furnace. Where is the sensor that detects humidity? Is it in the control? Is it on the thermostat on our main level? Where are the sensors normally installed? Also, what % of humidity should our house be at to still be safe without having too much humidity? Also - our Aprilaire runs without our furnace on - our fireplace heats our house well enough to not have the furnace run - it is ok to have the Aprilaire run thru the ducts with just cold air?


Aprilaires' response:

The humidity sensor is located in the humidistat controller. Now, which controller you have will determine the location of the sensor in the humidistat.

Do you have a 'test / reset' position on the controller? If you do, then the sensor is sticking out of the back of the controller and is located in the ductwork.

If you do not have a 'test / reset' position, and printed directly on the front of the controller are the number 15% through 45% then the sensor is inside the humidistat. If you have this mounted on the wall, it is sensing the air in the room it is located in. If this is installed into the ductwork, then it would be sensing the air in the duct.

It is acceptable to run the humidifier on just a fan call, no heat call. Just make sure to have hot water into the humidifier.

Any level of humidity is ok to have as long as you do not have condensation on your windows.

Hold, Hold, will batteries make my thermostat hold?

Monday, December 19, 2011 by Aprilaire Team
Consumer question:

If I have batteries in the unit and the power goes off when I am in the HOLD mode at, let's say, 72 when the power comes on again will the unit return to the HOLD mode at 72?


Aprilaires' response:

Thanks for contacting us with regards to your model 8463 Thermostat. If the thermostat is powered by 24v and has batteries, the batteries immediately switch over and your screen will not change. Hold mode does not change. If the thermostat is powered by the batteries and the power goes out, the thermostat will not know the power has gone out and the screen will not change. As long as batteries are installed (and not dead) the thermostat will not be affected by power outages.
Please let us know if we can be of further assistance.

Adjustable offset feature?

Sunday, December 11, 2011 by Aprilaire Team
Consumer question:

There is an offset between the actual room temperature and what the thermostat is reading. Is there a calibration setting or some adjustment I can make to alleviate this offset?


Aprilaires' response:

Thank you for contacting us with regards to your model 8353 Thermostat. This model does not have an adjustable offset feature. The thermostat should be displaying whatever temperature it's sensing.
We appreciate the opportunity to be of assistance.

Light a blinking, what does it mean?

Friday, December 9, 2011 by Aprilaire Team
Consumer question:

Just installed a 5000. When thermostat is in the off position and I set unit to run 30 min/hr., the blue lights on the cleaner flash and the filter indicator bars are animated on the LED control panel.

When on I place the thermostat on heat, and the heat kicks in, the blue lights on the cleaner unit do not flash but the filter indicator on display/control module is animated. Should the blue lights on the filter be flashing?


Aprilaires' response:

Thank you for contacting us. The unit is going to light up when it send a signal to the furnace fan to kick on. The 30 min/hour button will give you 30 minutes run time for the based on the total amount of run time in that hour. The run time of the heat call does count toward that 30 minutes and if toward the end of that hour the control has not reached 30 minutes it will kick on the fan to get the remaining minutes. The blue light should flash when ever the furnace does kick on and furnace fan runs. If you have any other questions please contact us at 800-334-6011. Thank you

Where can I buy your 8463 Aprilaire thermostat?

Thursday, December 8, 2011 by Aprilaire Team
Consumer question:

Want to buy your 8463 programable thermostat. Do Lowe's or Home Depot carry them and approximate cost. Thanks.


Aprilaires' response:

Thank you for contacting us with regards to our model 8463 Thermostat. Our products are not sold through retail suppliers such as Lowe's or Home Depot. For companies that can help you with obtaining and installing our products, please visit us online at www.aprilaire.com and enter your ZIP code into our dealer locator on the upper-right hand corner of each page.
We appreciate the opportunity to be of assistance. 

Supply or return, where should my humidifier be located?

Friday, December 2, 2011 by Aprilaire Team
Consumer question:

The furnace is a high efficiency heat pump. The humidifier is installed on the supply plenum with the bypass running to the supply plenun. Is this optimal for energy conservation or would the reverse be better? This is for the Aprilaire Humidifier model 440.

Aprilaires' response:

Thank you for contacting us regarding your humidifer. The unit can function equally well on both the supply and return side. The air flow will always be going from the supply to the return and will provide for excellent evaporation.

Does my one touch control work?

Thursday, November 24, 2011 by Aprilaire Team
Consumer question:

The control for the air cleaner is saying it is filtering even when it is disconnected from the unit and also when the unit is not actually filtering.

Aprilaires' response:

Thank you for contacting us with regards to your model 5000 Electronic Air Cleaner. The air cleaner control works on a negative signal logic, meaning that when it sees no connection to the furnace or thermostat, it assumes the fan is running and the air cleaner is working. The control needs to be wired in properly in order to truly see when the fan is active or not. If it still shows Filtering when the control is connected, there may be a problem with the wiring. We would recommend that you contact your installer to troubleshoot the installation further.

We appreciate the opportunity to be of assistance.

Does my Aprilaire model 8365 thermostat have progressive recovery?

Wednesday, November 23, 2011 by Aprilaire Team
Consumer question:

Does this model have progressive recovery? Is that the proper term for coming on before the time set on the thermostat so that the system reaches the temperature by the time the program specifies without using emergency heat?


Aprilaires' response:

Thank you for contacting us with regards to your model 8365 Thermostat. This model does not have the Progressive Recovery feature. And you are correct in your definition of the term. Without that feature, this means that the thermostat will adjust its set points based on the schedule that has been preset. If the new temperature is higher than the previous set point by enough degrees, the thermostat may call for the auxiliary heat to engage. Aprilaire thermostats with this feature that are similar to yours are the 8465, 8570 and 8600. With this feature, the thermostat will anticipate the next setting and activate the heating or cooling equipment early to reach the next set point at the scheduled time.
Please let us know if we can be of further assistance.

Couple of questions on the model 600 Aprilaire humidifier...

Saturday, November 19, 2011 by Aprilaire Team
Consumer question:

I purchased the 600(digital) and have 2 questions... 1. Does the manual mode resistor come with this unit in case I cant install the temp sensor outside and 2. Will extending the temp sensor wires with like gauge wiring cause any issues? I have a 20 foot run to get outside and the temp sensor wires are a foot long! Thank you and any tips would be appreciated.

Aprilaires' response:

Thank you for your email regarding your interest in our model 600 Aprilaire humidifier. The model 600 humidifier control includes a humidistat which has an on board manual mode resistor. If you decide to use the outdoor sensor you will need to move the manual/auto switch on the humidifier control from manual to auto. This allows the control to use the outdoor sensor instead of the onboard manual resistor. You can extend the outdoor sensor using thermostat wire which is typically 18 gauge. The maximum length you can extend it is 300 feet.

How do I turn off the "Progressive Recovery", and have the heating start at a programmed set time.

Friday, November 11, 2011 by Aprilaire Team
Consumer question:

Is there a way to turn off the "Progressive Recovery", and have the heating start at a programmed set time.

While the idea is great, the furnace starting up wakes us, and we do not want it to turn on before our alarms in the morning. We are fine with it not getting up to temperature right away. We would prefer to set the time it comes on and off.


Aprilaires' response:

Thank you for your inquiry about the Aprilaire thermostat model 8463.

The model 8463 "progressive recovery" function can be disabled by the following steps:
1. Press "mode" until the unit is "off".
2. Press and hold the "up arrow" and the "mode" buttons together for three seconds, the screen will change.
3. Press the "mode" button until the menu item "15", progressive recovery, appears.
4. Press the "down arrow" button to change from "1" to "0".
5. Press the "mode" button until the word "done" appears, and press "mode" one more time.

This will set the thermostat to start the heating/cooling at the time specified in your schedule.

Thank you for the opportunity to help in this matter.

I have a 1700 sqft. home with a heat pump system & electric furnace. Would the aprilaire 600 be appropriate for my home?

Friday, November 11, 2011 by Aprilaire Team
Consumer question:

I have a 1700 sqft. home with a heat pump system & electric furnace. Would the aprilaire 600 be appropriate for my home?


Aprilaires' response:

Thank you for contacting Aprilaire.

Yes, the model 600 humidifier should be enough to humidify a home of 1700 sq feet. You should run hot water to the humidifier for best operation.

Please let us know if you have any further questions.


Is the Aprilaire model 8466 thermostat Dual Fuel capatable, if so how do you set it up ?

Friday, November 11, 2011 by Aprilaire Team
Consumer question:

Is the 8466 Dual Fuel capatable, if so how do you set it up ?


Aprilaires' response:

Thank you for contacting us with regards to your model 8466 Thermostats. There are two requirements for dual fuel mode. The thermostat must be in heat pump mode (set by the switch on the back), and the auxiliary heat must be set to Gas or Oil. Under these conditions, whenever the thermostat stages from compressor to auxiliary, the thermostat will lock out the compressor.

This thermostat can also act as a fossil fuel kit. When the outdoor temperature sensor is installed and enabled, the thermostat enables settings for high and low balance points. The high balance point will lock out the auxiliary heat when the outdoor temperature rises above that level. The low balance point locks out the compressor when the outdoor temperature falls below that level. In-between, the thermostat will stage based on demand. Please see your installation instructions for more information.

We appreciate the opportunity to be of assistance.

I have no return duct, which controller can I use for my new Aprilaire humidifier?

Monday, November 7, 2011 by Aprilaire Team
Consumer question:

I just purchased a model 600 with the automatic humidity control. I do not have a return duct. I was planning on running a 6\" duct from the unit to the inside of the filter box to make the unit work. I noticed the model 60 controller says it needs to be mounted on the return duct. Why can this not be mounted on the wall near my thermostat. I would think if I used stand-offs to allow air to get to the sensor this would work the same. Does the sensor need active air flow to work or would it still register the humidity if mounted on the wall? I would rather use the automatic function rather than the manual mode for obvious reasons.

Aprilaires' Response:

Thank you for your email regarding your model 600A Aprilaire humidifier. The model 60 humidifier control requires air movement to ensure the humidity sensor on the back of the humidifier control gets an accurate reading of the humidity. When mounted to a wall it is difficult for air to get behind the humidistat. Our recommendation would be to install the manual humidistat our model 4655.

I am looking for a heat pump thermostat with a "temperature spread" of 2 degrees. Does the 8446 offer this?

Monday, October 24, 2011 by Aprilaire Team
Consumer question:

I am looking for a heat pump thermostat with a "temperature spread" of 2 degrees. Does the 8446 offer this?


Aprilaires' response:

Thank you for contacting Aprilaire.

Yes, you may use the 8446 thermostat for your needs. It is designed for use with a heat pump, and the "temperature spread out" is adjustable from one to four degree differences.

What Thermostats work well with the humidifiers?

Monday, October 24, 2011 by Aprilaire Team
Consumer question:

What Thermostats work well with the humidifiers?


Aprilaires' response:

Thank you for your email regarding your model 600A Aprilaire humidifier. Some thermostats can control humidifiers if they have humidifier terminals. Aprilaire does not manufacture a thermostat which can control a humidifier. We ask for you to check with local heating contractors in your area for the thermostat they would recommend to use. As long as the thermostat has humidifier terminals that have dry contacts it can operate your model 600A.

Do you have an Aprilaire Air Cleaner that can be used for a retrofit downflow furnace?

Monday, October 24, 2011 by Aprilaire Team
Consumer question:

Do you have a model that can be used as a retrofit for a downflow furnace with a 20x25x1 filter?


Aprilaires' response:

Thank you for contacting us regarding our Aprilaire air cleaners. We have two models that will fit for 20 x 25. Our model 2210 and 4200. The 2210 is shipped with a MERV 10 filter but can be upgraded to the MERV 13. The 4200 ships with the MERV 13 filter and the electronic air cleaner control. Please view the attached literature for the air cleaner products.

You can contact an Aprilaire dealer regarding pricing and installation availability. To find a local dealer, enter your zip code in the dealer locator at www.Aprilaire.com. If you don't have an Aprilaire dealer in your area, feel free to contact any licenced HVAC company for pricing and installation.

If you have any further questions regarding this or any of our products, please feel free to contact our customer service department at your earliest convenience.