The Goodman GR9S960803BN gas furnace delivers 96% AFUE, meaning almost every dollar you spend on gas goes toward heat. But like any machine, it runs best when you take care of it.
Here’s Tony’s seasonal checklist for keeping your high-efficiency furnace humming all year—with tips that save money, extend equipment life, and avoid surprise breakdowns.
🍂 Fall: Pre-Heating Season Prep
Before the first frost hits, do this:
✅ Replace the furnace filter
– Check every 1–2 months
👉 Filter guidelines from ENERGY STAR
✅ Clear the area around the unit
– No boxes, paint cans, or flammable materials
✅ Check the thermostat and test heating mode
– Switch from "Cool" to "Heat", make sure furnace ignites
✅ Schedule a pro tune-up
– Especially for 90%+ AFUE units with PVC venting
👉 Annual HVAC tune-up checklist – This Old House
❄️ Winter: In-Season Monitoring
While the furnace is running:
✅ Keep vents open and unobstructed
– No rugs, furniture, or blocked ducts
✅ Listen for odd noises
– Rattling, booming, or whistling could signal a combustion or blower issue
✅ Monitor fuel usage
– If gas bills spike, check for leaky ducts or improper burn rate
✅ Inspect condensate drain (for 90%+ units)
– This Goodman model has a condensate trap that must stay clear
👉 Condensate drain tips from HVAC School
🌷 Spring: Shut-Down & Clean-Up
After heating season ends:
✅ Replace filter again
– Even if you changed it in fall
✅ Inspect flue pipe and exterior vent
– Look for corrosion or blockages
✅ Shut off pilot (if applicable) or power down unit
– Depends on system design and control board
✅ Clean blower compartment
– If you’re DIYing this, be sure to cut power first
👉 Spring HVAC maintenance guide – Carrier
💡 Bonus Tip: Keep Your Warranty Valid
Many warranties require proof of yearly professional service to stay in effect. Keep:
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Signed inspection receipts
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Photos of your setup and model/serial tags
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A log of maintenance tasks
👉 Goodman Furnace Warranty Registration & Conditions
🛠️ Tony’s Tip
“A 96% furnace is a high-performance machine. Treat it like a car—oil changes, air filters, and annual checkups. Don’t wait until it quits on you in February.”
In the next topic you will know about: Warranty Tips: Registering Your Goodman System for Full Coverage
