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.

Comments for Does my Aprilaire model 8365 thermostat have progressive recovery?

Tuesday, December 6, 2011 by Mike Klein:
When my system indicates "Aux Heat" nothing happens - no heat, no fan. Not sure of the model, but there is a sticker under the battery cover that says 8466. What should happen when the system indicates "Aux heat"?
Wednesday, December 11, 2013 by K knight:
We have model #8466. Lately it seems that the air blowing is very hot, and we have also noticed that the red "emergency heat" light has been coming on despite the fact that it is set to "Heat" as well as the text "Auxiliarly Heat" displayed under the "set at" section on the lower right side of the aprilaire display. We are worried something isn't functioning properly, especially with such warm air coming out. We looked through the owners manual and haven't found anything that seems to deal with this. Any help would be greatly appreciated. Thank you!
Thursday, December 12, 2013 by Brett:
Thank you for contacting us with regards to your model 8466 Thermostat. The Auxiliary Heat function of the thermostat is designed to turn on when the heat from your heat pump is not sufficient to keep your house warm. If your heat pump is not able to keep up, the auxiliary heat will turn on. The air from your auxiliary heat will be warmer than from the heat pump. This does not mean that something is wrong, only that the auxiliary heat is being called for to satisfy your heating needs.
Please let us know if you have any further questions.
Monday, January 27, 2014 by Chris Werle:
I have an AprilAire model 8466 thermostat working with York dual zone heat pumps. My auxilliary heat on the larger unit is provided by a propane furnace. The AUX heat is currently set to kick on when the outside temperature hits 40 degrees. Given the high cost of propane, and the fact that the heat pumps are brand new as of May 1st, 2013, it seems to me it would be more cost effective to lower the AUX heat setting to 35 degrees. Can you please tell me the procedure for doing this? Thanks
Wednesday, January 29, 2014 by will:
Thank you for your email regarding the Aprilaire model 8466; Turn mode to off and then hold the mode and the arrow up button for 3 seconds, press mode until screen #17 – change setpoint from 40º to 35º by using the arrow buttons. Wait 10 seconds and turn the 8466 thermostat back on.
Wednesday, January 29, 2014 by Will:
Thank you for your email regarding the Aprilaire model 8365; The older Aprilaire 8365 thermostats did not have progressive recovery, but the 8400 series thermostats do.
Please feel free to contact us with any further questions.

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