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 Monticello, MN
Monticello furnace repair is a $79 trip charge, waived when you okay the repair, with the written flat-rate price in hand before we start. We take calls 7 days, 7am–9pm, and no-heat homes go first. Many furnaces from the town's 1990s–2000s growth vent PVC through a side wall that can ice over.
Furnace repair calls in Monticello homes
Monticello grew from about 5,000 people in 1990 to nearly 13,000 by 2010, and the furnaces still running from that stretch are well into their second decade or beyond. The newer ones are 90%-plus models venting PVC out a side wall, and their winter calls are specific: a condensate line that freezes where it runs along an outside wall or into a cold garage, a trap that plugs, an exhaust termination that ices over or disappears under a drift. Each of those shuts the furnace down at the pressure switch, often at the coldest hour of the night.
The older part of town near the river and downtown has earlier houses with chimney-vented furnaces, where draft problems and worn inducers are more common. Basements finished after move-in sometimes wall the furnace into a small room without enough combustion air. We check venting and drainage along with the failed part, since the cause is often outside the cabinet.
Updated September 23, 2026
How much does furnace repair cost in Monticello?
Every furnace repair call in Monticello starts with a $79 trip charge, waived when you approve the repair, and a written price before any work. Same prices in Monticello as in every town we serve. National averages (HomeGuide, 2026), not our prices: a limit switch $100–$375, a control board $300–$650, an inducer motor $400–$1,100. 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 Monticello: questions
Our Monticello furnace quits on the coldest nights, and the drain line runs through the garage. Related?
Very likely. A high-efficiency furnace makes water all winter, and a drain line or condensate pump in an unheated garage or along a cold wall can freeze solid. When the water can't leave, it backs up into the trap, the pressure switch opens and the furnace shuts down. Thawing it gets you through the night. The lasting fix is rerouting the line to a warm space or adding heat tape, which we can price on the visit.
Our Monticello furnace is original to the house. What usually goes wrong at this age?
On furnaces 20 to 30 years old, we see inducer motors, control boards and blower motors wear out, along with cracked heat exchangers on some models. A single failed part can still be worth fixing, and we'll write the price. Per HomeGuide, typical national ranges are $400–$1,100 for an inducer motor and $300–$650 for a control board. Past 20 years, weigh that against a new furnace before approving a big repair.
More in Monticello
- Furnace replacement in Monticello
- AC repair in Monticello
- AC replacement in Monticello
- All HVAC service in Monticello
Furnace repair near Monticello
- Big Lake, MN 3 mi
- Becker, MN 7 mi
- Albertville, MN 8 mi
- Otsego, MN 9 mi
- Saint Michael, MN 9 mi
- Buffalo, MN 10 mi
Brands we repair
Guides on furnace repair
How Long Does a Furnace Last in Minnesota?
How long a furnace lasts in Minnesota: sourced 15–20 year figures, why long winters add wear, signs it's near the end, and how to decide repair or replace.
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Bryant's Evolution 987M modulates; Legacy furnaces are single-stage. What that means in a Minnesota winter, how warranties compare, and where Preferred fits.
Read the guideContact Us
Furnace repair in Monticello? Call or send a request.