Goodman GKS9 Furnace Overview

I’ve owned a house with one of these since early 2011, which had this unit installed when built in 2007. In 2014, the control board failed, then the draft inducer motor in 2015. It has been reliable since those issues; the other portion of this dual fuel split system is a York Affinity 5t heat pump. I suspect the draft inducer motor failure may have been accelerated due to an incorrect heating cph setting in the thermostat, which had been left at the default for a standard efficiency furnace resulting in more frequent cycling. Reducing the thermostat’s cooling cph setting by one step also improved both the efficiency of and dehumidification by the heat pump, bringing humidity down ~5% to an ideal state in the mid 40’s. The contractor’s installation had a fair amount of air leakage from its seams, which I mostly fixed with foil tape within the last year, but I recently found this furnace has significant vacuum leaks from the lower blower section’s service door. Considering it has no gaskets on the door, I was surprised to see its marketing claim of < 2% cabinet air leakage. The leakage from the bottom of the door was most significant, and I used a combination of adhesive weatherstripping foam on the sides and removable / no residue tape along the bottom seam to properly seal the cabinet door.

We had this furnace installed by the builder of our new home and it is a pain in the butt. It will take up 45 minutes to bring the temperature up one degree. Service guy checked it out and said Oh, it’s working just the way it’s supposed to. If that’s the way it’s supposed to work then it’s a long way from being energy efficient. I wouldn’t recommend this piece of crap to anyone.

Purchased furnace and used for 2-3 months for first winter. Did not use it for AC. Second winter it turned on but did not work. Replaced the circuit board and then a loose wire and used for 3-4 months that winter. Third winter, limit switch was replaced and it worked one day and here I sit again and the furnace is not working. The furnace does not have even 12 months of use. Goodman furnaces are lemons! I am going to contact Better Business Bureau, Goodman, Homebuilders Association, Realtors, etc.

Purchased a new construction home (1st and only owner of the home) with 4 Goodman units (2 furnaces and 2 A/C units). Neither the builder nor the installer registered the units when the home was built. When I called customer service and explained my case regarding the failure of parts in one furnace, I was essentially told nothing could be done to warranty parts at this point because it needed to be done in the first 60 days of installation. I would have thought the company would have honored the warranty of 10 years (or even 5 years with a one time exception rule) on parts as per their claims regardless of the non-registration considering the circumstances that the builder and installer dropped the ball on the registration. Had someone informed me, I would have certainly registered the product to meet this ridiculous requirement of a 60 day period. Not only will they not warranty the parts now, but also told me there is nothing they can do going forward. Essentially, I’m on the hook for any part failure for the next four years as well. Terrible customer service…you should stand behind your products and not hide behind warranty deadlines! Either you have faith in the quality of your products or you don’t. Goodman is missing the bigger picture here! Disappointed to say the least.

This is my second review. After 8 years something finally broke, the control panel. It was covered. I paid $85.00, which I would have spent anyway on the fall checkup. The part was covered, no problem. I still think with any furnace the install is the key. Goodman is a low cost no-frills furnace, a good value. By the way, my installer said he does more service work on Trane than Goodman.