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 Delano, MN
Central Minnesota Heating and Cooling repairs furnaces in Delano, open 7 days, 7am–9pm. The visit is a $79 trip charge, waived when you approve the repair, and the written flat-rate price comes before any work. Near the Crow River, damp basements rust vent pipe and cabinets, so we check those every time.
Furnace repair calls in Delano homes
Most no-heat calls in Delano come from one of three kinds of house. The late-1800s homes near Bridge Avenue and the river usually have a furnace that replaced a boiler or gravity system long ago, often venting into a brick chimney it shares with the water heater. Those basements run damp, and the moisture shows up as rust on the flue connector, the burner tray and the bottom of the cabinet.
The 1950s–70s ramblers mostly carry 80% furnaces, where a worn inducer motor or a cracked igniter is the usual failure. In the 1990s and 2000s subdivisions, the first high-efficiency furnaces are reaching the age of plugged condensate traps, split pressure-switch hoses and control boards that quit after a power surge. We watch the startup sequence, find the step where it stops, and test that part before quoting anything.
Updated September 23, 2026
How much does furnace repair cost in Delano?
Every furnace repair call in Delano starts with a $79 trip charge, waived when you approve the repair, and a written price before any work. Same prices in Delano as in every town we serve. National averages (HomeGuide, 2026), not our prices: an igniter $100–$250, a flame sensor $80–$250, a pressure switch $150–$400. 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 Delano: questions
The vent pipe above our Delano furnace is rusty. Should we worry?
Enough to have it looked at. Riverside basements in Delano stay damp, and galvanized vent pipe rusts from the outside while flue-gas condensation works on it from the inside. Once a joint or elbow thins out, exhaust can leak into the basement instead of going up the chimney. We check the connector, the chimney base and the draft on every service call, and replacing a run of vent pipe is a small job next to anything on the furnace.
The furnace in our 2000s Delano house shuts off on the coldest mornings. What's going on?
On a high-efficiency furnace, the usual suspect is the PVC venting. In deep cold, frost can build at the intake or exhaust termination, or a drift can cover it, and the pressure switch shuts the burners off. A frozen condensate line does the same. Check that both pipes outside are clear, clearing them gently by hand. If it keeps happening, we look at pipe length, slope and termination height, and at rerouting the drain.
More in Delano
Furnace repair near Delano
- Independence, MN 4 mi
- Rockford, MN 4 mi
- Watertown, MN 6 mi
- Montrose, MN 6 mi
- Maple Plain, MN 7 mi
- Loretto, MN 8 mi
Brands we repair
Guides on furnace repair
Cracked Heat Exchanger: Symptoms, How It's Confirmed and What to Ask For
Signs of a cracked furnace heat exchanger, how a technician confirms one, what to ask for if your furnace is red-tagged, and when to repair or replace it.
Read the guideCan a Furnace Leak Carbon Monoxide? How It Happens and What to Do
Yes. How a gas furnace leaks carbon monoxide, the symptoms MDH lists, Minnesota's CO alarm law, what to do when the alarm sounds and what a red tag means.
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