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.
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Furnace Repair in Newport, MN
For furnace repair in Newport, the visit starts with a $79 trip charge that comes off when you approve the fix, and you see the flat-rate price in writing first. We run 7am–9pm, every day of the week. Old Town's cottages and bungalows often vent into old masonry chimneys, so we test draft there.
Furnace repair calls in Newport homes
Newport's furnace calls follow its terrain. Down in Old Town near the river, the houses are mostly cottages and bungalows, and the furnace often vents into a chimney older than anything connected to it. Blocked or crumbling flues show up there as pressure switch lockouts, rollout trips and backdrafting at the water heater.
East of Highway 61, the 1960s houses usually have furnaces that are second or third replacements, so the repairs are the familiar ones: igniters, flame sensors, inducer motors and blower capacitors. On the bluffs, larger homes push air through long ducts to far rooms, and a condensing furnace may drain to a pump because the floor drain sits across the basement. When a high-efficiency furnace stops in one of those homes, we check the condensate pump and its overflow switch early, since a full reservoir cuts the furnace off.
Updated September 26, 2026
How much does furnace repair cost in Newport?
Every furnace repair call in Newport starts with a $79 trip charge, waived when you approve the repair, and a written price before any work. Same prices in Newport as in every town we serve. National averages (HomeGuide, 2026), not our prices: a control board $300–$650, an inducer motor $400–$1,100, a PSC blower motor $500–$1,400. 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 Newport: questions
Is it safe to keep running the old furnace in our Old Town Newport cottage until spring?
Often, provided it passes a safety check. We measure carbon monoxide at the furnace and in the living space, test the flue's draft and inspect the heat exchanger. If those are sound, a repair that carries you through winter is reasonable, and the replacement can wait for a milder month. A cracked heat exchanger or exhaust spilling into the basement is another matter: that furnace gets shut down until it's repaired or replaced.
The condensate pump next to our Newport furnace keeps shutting everything down. Why?
Its overflow switch is doing its job. Many condensate pumps have a float that cuts power to the furnace when the pump can't empty, so the basement doesn't flood. The usual culprits are algae or sludge in the reservoir, a worn-out pump motor, a stuck check valve, or a discharge line that's kinked or sloped the wrong way. We clean or replace the pump, correct the line, then run the furnace through a full cycle.
More in Newport
- Furnace replacement in Newport
- AC repair in Newport
- AC replacement in Newport
- All HVAC service in Newport
Furnace repair near Newport
- South St. Paul, MN 2 mi
- St. Paul Park, MN 2 mi
- Inver Grove Heights, MN 3 mi
- Cottage Grove, MN 4 mi
- Woodbury, MN 4 mi
- Maplewood, MN 6 mi
Brands we repair
Guides on furnace repair
How Long Does a Furnace Replacement Take?
A straight furnace swap is usually done in one day. Venting changes, a chimney liner, gas line or duct work, and the permit inspection add time. What to expect.
Read the guideFurnace Noises: What Each Sound Means and When to Shut It Off
Bang at startup, squeal, scrape, rattle, hum, click, whistle or a rumble after shutoff: what each furnace noise means and whether it's safe to keep running.
Read the guideContact Us
Furnace repair in Newport? Call or send a request.