What Does the Blinking Light on My Furnace Mean?
The blinking light on a furnace is a fault code from the control board. How to read it safely, what common codes mean, and when a reset is fine or not.
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Furnace Repair in Waverly, MN
We handle Waverly furnace repairs every day from 7am to 9pm. There's a $79 trip charge that disappears when you approve the repair, and we write down the flat-rate price before starting. Many houses here were built in the 2010s, so we check whether the manufacturer's parts warranty still covers the failed part.
Furnace repair calls in Waverly homes
Waverly has two furnace stories. In the subdivisions built during the 2010s growth, furnaces are direct-vent 90%+ units in tight houses, and they're young enough that a failed part may still fall under the manufacturer's parts warranty if the equipment was registered. Common calls there are condensate traps and drain lines, flame sensors, and PVC intake and exhaust pipes that frost or drift shut in a cold snap. We look up the warranty before quoting so you don't pay for a part the maker covers.
In the older homes in town, the furnace and water heater often share one brick chimney, and the furnace may already have been swapped without anyone checking whether the flue still fits. A mismatched or deteriorated flue can backdraft, which shows up as a tripped rollout switch, soot at the water heater's draft hood, or a CO alarm. We test draft and CO on those calls before anything else.
Updated September 23, 2026
How much does furnace repair cost in Waverly?
Every furnace repair call in Waverly starts with a $79 trip charge, waived when you approve the repair, and a written price before any work. Same prices in Waverly as in every town we serve. National averages (HomeGuide, 2026), not our prices: a variable-speed (ECM) blower motor $800–$2,300, an igniter $100–$250, a flame sensor $80–$250. More in the furnace repair cost guide.
Signs your furnace needs a technician
- The inducer starts, the igniter glows, then the burners never light
- The burners light for a few seconds and shut off, over and over
- The furnace runs but the vents blow cool air
- A blinking code on the control board, or the furnace has locked out
- Your CO alarm went off or the burner flames look lazy and yellow
- New banging, squealing or grinding when the furnace starts
- Water pooling around a high-efficiency furnace
More detail on our furnace repair page.
Symptom guides: Blowing cold air · Won't ignite · Short cycling · Blinking light codes · Pressure switch trips · Strange noises · Leaking water · Burning smell · Red tag · Carbon monoxide
Furnace repair in Waverly: questions
What does a combustion safety test involve in an older Waverly house?
We check how the furnace and water heater vent under the house's worst conditions: exhaust fans and the dryer running, interior doors closed. We measure draft at the flue, look for spillage at the water heater's draft hood, and measure carbon monoxide in the flue and the room. In shared-chimney homes where the furnace was swapped without a flue check, that test shows whether the chimney still works.
Why does our newer Waverly furnace shut down during a blizzard?
Direct-vent 90%+ furnaces pull combustion air through one PVC pipe and exhaust through another. When wind-driven snow packs the intake or frost closes the exhaust, the pressure switch stops the furnace. Check the pipes outside and clear them gently. If they're clear and it still won't run, or they keep drifting shut, the terminations may need raising or moving, and we price that in writing.
More in Waverly
- Furnace replacement in Waverly
- AC repair in Waverly
- AC replacement in Waverly
- All HVAC service in Waverly
Furnace repair near Waverly
- Montrose, MN 3 mi
- Howard Lake, MN 5 mi
- Winsted, MN 8 mi
- Buffalo, MN 9 mi
- Delano, MN 9 mi
- Watertown, MN 9 mi
Brands we repair
Guides on furnace repair
Furnace Burning Smell in a Minneapolis Home: What Each Smell Means
Dust, hot plastic, rotten eggs or exhaust: what each furnace smell means, which mean shut it off now, and the basement causes we find in Minneapolis homes.
Read the guideFurnace Won't Ignite: Find Where the Startup Stops
Furnace clicking but not lighting? Follow the startup sequence a technician uses: thermostat, power, inducer, pressure switch, igniter, gas and flame sensor.
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Furnace repair in Waverly? Call or send a request.