Aprilaire Releases New 8400 Series Thermostat

Friday, November 13, 2009 by Justin Randall
Aprilaire’s new 8400 Thermostat is a great way to control your heating and cooling system.  It has a large easy to read screen, fan circulation mode for improved indoor air quality and because it’s programmable it will save you up to 30% off your energy bills!  Learn more here.



Comments for Aprilaire Releases New 8400 Series Thermostat

Thursday, March 31, 2011 by Fred Paepke:
Looking for thermostate to use with zoning system on a Geothermal Heat Pump System.
Thursday, April 19, 2012 by Jean Pecotte:
I'm trying to register my Aprilaire Thermostat five year warranty.
Thursday, April 19, 2012 by Jean Pecotte:
PLEASE! I'm trying to register my Aprilaire electronic thermostat. I'll admit I don't know much about computers as I'm 87 years old, but I'm trying. I do love my new Aprilaire.
Saturday, February 2, 2013 by sheri carrigan:
please help me ....i have an aprilaire 8400 thermostat...the message centre said it was time to change the filter and humidifery pad...ive done this but the message is still showing up.....
Monday, September 2, 2013 by Douglas:
when it reaches set temp.75 runs for hours after before cuts off
Wednesday, November 27, 2013 by brad:
Thank you for your comment regarding your model 8400 Aprilaire thermostat. When your model 8400 series thermostat is calling for heat the word heating will be displayed on the screen. This indicates the thermostat relay has closed to send the heat call to your HVAC system. Once the set point has been reached, the word heating will disappear from the display. If heating does not disappear after the set point temperature is reached, please contact your HVAC installer to obtain a replacement thermostat. If heating is not on the display once set point temperature is reached, the thermostat is no longer calling for heat and it would appear to be an issue with your HVAC system. We ask for you to please contact your HVAC installer to have them review the installation and operation of the thermostat and HVAC equipment.

Thank you for giving us the opportunity to be of assistance.
Sunday, December 1, 2013 by Gary:
I have the 8400 thermostat (1 in each zone). I hear a clicking noise every time the thermostat kicks on or off.. If this normal, is there anyway I can turn this off? This is so annoying as one of the thermostats is in my bedroom.. I can't imagine this is a feature.

Leave a comment





Captcha