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 Eagan, MN
Eagan homeowners can book furnace repair with us 7 days a week, 7am–9pm. It's a $79 trip charge, waived if you approve the repair, and you see the written flat-rate price first. Townhome furnaces here often share a utility closet with the water heater, which makes combustion air part of the check.
Furnace repair calls in Eagan homes
Most Eagan houses went up in the 1980s and 1990s, so the furnace in a typical two-story or split-entry is either an aging original or a replacement from the 2000s. Both are old enough for hot surface igniters, inducer bearings, flame sensors and pressure switches to act up in the first cold week, and an original unit that's still running deserves a careful heat exchanger inspection before much money goes into it.
Townhomes are their own category. A furnace squeezed into a closet beside the water heater leaves little room to pull the burner assembly or slide out the blower, and the closet door louvers may be the only combustion air both appliances get. Walkout lower levels add another wrinkle: side-wall PVC vents close to grade can be buried by snow shoveled off a patio, and the furnace locks out until someone digs them clear.
Updated September 23, 2026
How much does furnace repair cost in Eagan?
Every furnace repair call in Eagan starts with a $79 trip charge, waived when you approve the repair, and a written price before any work. Same prices in Eagan as in every town we serve. National averages (HomeGuide, 2026), not our prices: a flame sensor $80–$250, a pressure switch $150–$400, a limit switch $100–$375. More in the furnace repair cost guide. For what drives a quote locally, see HVAC cost in Eagan.
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 Eagan: questions
The furnace in our Eagan townhome closet tripped a rollout switch. What does that mean?
A rollout switch trips when flame escapes the burner area, and it's a safety shutdown, so don't keep resetting it. The usual causes are a blocked flue or heat exchanger, or burners starved of combustion air because the closet louvers are covered or a solid door replaced a louvered one. Clear anything stacked against the closet door, keep your CO alarms working and call us. We find the cause before the furnace runs again.
Which gas company do we call about a gas smell in Eagan?
The one on your gas bill. Eagan is split among CenterPoint Energy, Minnesota Energy Resources and Xcel Energy depending on the address, so check before you need it. If you smell gas, leave the house first and call the utility from outside, without using switches or trying to relight anything. Once the utility has made it safe, we can repair the furnace or its gas connection.
More in Eagan
- Furnace replacement in Eagan
- AC repair in Eagan
- AC replacement in Eagan
- Heat pumps in Eagan
- Mini-splits in Eagan
- Boiler service in Eagan
- Tune-ups in Eagan
- HVAC cost in Eagan
- All HVAC service in Eagan
Furnace repair near Eagan
- Rosemount, MN 5 mi
- Apple Valley, MN 6 mi
- Mendota Heights, MN 6 mi
- Burnsville, MN 6 mi
- Inver Grove Heights, MN 7 mi
- Bloomington, MN 7 mi
Brands we repair
Guides on furnace repair
96% vs 98% AFUE Furnace: Is the Upgrade Worth It in Minnesota?
What AFUE measures, the gas math from 80% to 96% to 98% using your own bill, and what a 98% furnace really buys you in a cold Minnesota house.
Read the guideWhat Size Furnace Do I Need for a Minnesota House?
Furnace size comes from a Manual J heat loss at a -15°F design day, not square feet. Input vs output BTU, AFUE, why old furnaces run big and what to ask for.
Read the guideContact Us
Furnace repair in Eagan? Call or send a request.