Goodman GMNT Furnaces | FurnaceCompare®

Goodman GMNT Furnace Overview

The Goodman GMNT series is a multi-position gas furnace operating with a 92.6 AFUE. The 5 different models within the series can be installed in an upflow, downflow, or horizontal position. This Energy Star approved unit features a four speed blower motor, corrosion-resistant secondary heat exchanger and offers vertical or horizontal venting options. A durable, insulated steel cabinet wraps around the unit for increased protection. The units come fully assembled and can be installed for direct vent (2 pipe) or non-direct vent (1 pipe) installation. Goodman also offers optional L.P. conversion kits and concentric vent kits for the GMNT series.

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Consumer Reviews of Goodman GMNT


  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
  • #8 of 23 Goodman Furnace
  • 35.71% of customers recommended

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Goodman GMNT Furnace Reviews

Showing 1-5 of 11 reviews

"Goodman Furnaces are Satisfactory, but They Last Long"

4.0 rating
Somewhat Satisfied

I’ve owned this furnace since 1999 when I bought my house that October. It wasn’t new then, maybe a few months old or so at the time. I like that it’s almost been 20 years and I haven’t had a major problem with it. The igniter stopped working a few times one winter. This was about 5 years after I bought the house. Needless to say, I spent more than expected to get that fixed but it was good from there on out. I was also told during that time that there was an air flow problem that also got fixed that day. The repairs happened swiftly and went extremely well. I haven’t had a problem since. Now that I know a bit more about the brands, prices and quality of other companies, I might not buy this brand again. I personally haven’t had any problems with it and yes, I would recommend this product to anyone. On the other hand, there are cheaper brands out there with better prices, cheaper costs when it comes to managing the equipment, and better quality of the products in general.

Wilmington, DE

"Poor Furnace"

1.0 rating
Very Unsatisfied

Had this furnace 11 years. There have been a series of problems, starting with a failed circuit board and three igniter replacements. This has been an uncomfortable furnace in our house because, to extract the last amount of heat before shutoff, the discharge temperature would go very low, creating draftiness throughout the house. I had the HVAC mechanic look at it, but was told the limit could not be reset. Last winter the blower motor started acting up and there was a smell of burning sometimes through the house, which I thought was burning motor windings. The blower became increasingly harder to start, which I attributed to failing bearings creating additional strain on blower start. In replacing the furnace now, we find the burning smell was the plastic drain pan underneath the “A” coil. There is considerable melted plastic and soot on the heat exchanger. It is puzzling why the high temperature limit would not shut the unit off, creating a very unsafe condition in our attic. Needless to say, our replacement furnace is NOT a Goodman.

Southeast Michigan

"Goodman furnace"

1.0 rating
Very Unsatisfied

In 3 months time we replaced collector box 4 times, had to replace the inducer assembly 3 times within 2 years and had to replace the blower motor. It is loud and once again we are having problems with it. We replaced inducer assembly 1 week ago and the little sensor has to be bypassed to keep furnace running. Manufacturer is of no help. Goodman is junk!


"Excellent Furnace"

5.0 rating
Very Satisfied

In the 7 years I have had this furnace, the igniter was replaced once. It works excellent and provides an even heat. Save about $150 a month during the heating season. And yes I installed it myself. I had a heating contractor check it our before start up. I would not hesitate to purchase another Goodman.

Rochester, NY

"Not a single problem"

5.0 rating
Very Satisfied

Installed this furnace 7 years ago and haven’t touched it since. I just change filters and make sure the flame is blue and it hasn’t let me down. Correct installation is key for any furnace. Sounds like too many of the reviews here are from improper installation!

Minburn, Ia

Other GMNT Reviews

While many consumers on HVAC forums express their disappointment with Goodman products, very few pinpoint the GMNT as the source of their problems. Based on reviews on and, Goodman furnaces have a reputation of being prone to repairs and needing frequent service. Additional forms found on and highlights the affordability of Goodman products and the GMNT. Homeowners and HVAC contractors note the unit offers a high level of comfort and increased efficiency for a lower price point. Contributors also added the model is backed by a solid warranty.

Goodman GMNT Model Numbers

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

Model Number AFUE BTUs per Hour
GMNT040-3 92.6 40,000
GMNT060-3 92.6 60,000
GMNT080-4 92.6 80,000
GMNT100-4 92.6 100,000
GMNT120-5 92.6 120,000

GMNT Warranty

Goodman offers a limited lifetime warranty for the heater exchanger and a 5-year limited

warranty for all parts. In order to receive this warranty, homeowners must register their

product at within 60 days of purchase.

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