Aire Flo AF90MPE Furnaces | FurnaceCompare®

Aire-Flo AF90MPE Furnace Overview

Aire-Flo once promoted its now-discontinued AF90MPE gas furnace series as a great value in the coldest of climates, with an AFUE of up to 92.1 percent. This furnace can be installed in upflow/horizontal-left or counterflow/horizontal-right configurations. The unit has a 3-speed blower motor.

For added durability, the heat exchanger has Crimp-Tite seams, while the cabinet is made corrosion-resistant by its heavy-gauge, pre-painted coating. The whisper-quiet burners and Honeywell slow-opening Smart Valves are designed for quiet operation. Furthermore, the Honeywell “Smart Valve” system has LED diagnostics that make troubleshooting simple.

For safety, a 5-amp fused low voltage circuit protector helps earn this gas furnace ANSI and CSA certifications. Connections for an electronic air cleaner, humidifier and continuous fan add-ons are standard, and all Aire-Flo gas furnaces can use a common LP kit.

Questions about this model?

Consumer Reviews of Aire-Flo AF90MPE


  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
  • #1 of 3 Aire-Flo Furnace
  • 100% of customers recommended

Read Reviews of Other Aire-Flo Products

Find ratings and reviews for Aire-Flo Air Conditioners, Furnaces and more

Read Reviews

Top 10 Furnaces

See who made our list of the best Furnaces of 2022.

See the Top Products

Find a Certified Heating & Cooling Professional In Your Area

Contact a top-rated local expert to help with all of your home's HVAC needs.

Aire-Flo AF90MPE Furnace Reviews

"Gets a Bad Rap"

5.0 rating
Very Satisfied

I’ve had my Aire-Flo 90% for 6 years now without issue. I did have to clean the flame sensor once but that’s basic up keep that needs to be done. Reading the reviews on here sounds like most of the problems are fly-by-night outfits who don’t stand by their work. Moving to a new home and will have the contractor install a new Aire-Flo when I get settled. I’m more than happy with my unit.

central michigan

Other AF90MPE Reviews

A handful of complaints in other in other online discussion forums indicate a range of common malfunctions with the AF90 gas furnace. Problems with the inducer fan and ignitors are regularly posted.

For example, a homeowner experiencing trouble with his AF90MPE furnace writes on that his furnace runs only for a short time before beginning to fail. The homeowner posts a diagnostic code in which the LED repeatedly blinks three and then six times. An online technician suggests that the problem is with the pressure switch being in the wrong position. The homeowner also discovered that ice was blocking the intake pipe. Removing the blockage caused the furnace to resume normal functioning and the LED code to return to normal.

Question and Answer


Where is the flame sensor on an Aire Flo furnace? The furnace doesn’t run long or heat well.


On 2016-02-04 Gary wrote:

That definitely sounds like it could be a problem with the flame sensor. The flame sensor will be close to the burner, with the rod located in the flame. If it needs to be cleaned, you can use steel wool or a fine sandpaper.

AIRE FLO AF90MPE Model Numbers

The AF90MPE is available in different models which vary in efficiency and capacity.

Model Number AFUE BTUs per Hour
AF90MPE050U2* 92.1 50,000
AF90MPE050U3* 92.1 50,000
AF90MPE075U3* 92.1 75,000
AF90MPE100U3* 92.1 100,000
AF90MPE100U4* 92.1 100,000
AF90MPE125U5* 92.1 125,000

AF90MPE Warranty

The Aire-Flo AF90MPE’s heat exchanger comes with a 20-year limited warranty and all additional parts have a 5-year warranty.

HVAC Brands

Learn more about your home's heating and cooling system with our guides, how-to's, FAQ's, tips and more.

Ready to get a quote from an HVAC contractor?

Let us know what type of service you need and we can connect you with a certified local HVAC contractor.

Please enter a valid name

Please enter a valid phone number

Please enter a valid zip code

There are no dealers in this zip code.

Please enter a valid email address

Please select repair or replace

Please select heating, cooling or both