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 Hanover, MN
We handle furnace repair in Hanover on both banks of the Crow River, the Wright County side and the Hennepin County side alike. The visit starts with a $79 trip charge that's waived once you approve the repair, and you get the written price before we touch anything. We're open 7 days, 7am–9pm.
Furnace repair calls in Hanover homes
Most Hanover furnaces we open are the first ones the house ever had, put in as the subdivisions went up from the late 1990s on. Past twenty years, the usual failures are an inducer motor with worn bearings, a hot-surface igniter that has cracked, a brittle pressure-switch hose or a control board that finally quits. Each of those is a normal repair. The bigger question is whether the heat exchanger and blower have more winters in them, and we tell you what we see.
Walk-out lots add a wrinkle. The furnace usually sits in a mechanical room behind the finished lower level, and a chilly walk-out in January is more often a duct and sizing issue than a broken furnace. On the acreage around town, a propane furnace that locks out on a cold night can simply mean the tank is low, so check the gauge before you call.
Updated September 23, 2026
How much does furnace repair cost in Hanover?
Every furnace repair call in Hanover starts with a $79 trip charge, waived when you approve the repair, and a written price before any work. Same prices in Hanover 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 Hanover: questions
Can you still get parts for a late-1990s furnace in Hanover?
Usually, yes. Igniters, flame sensors, inducer motors, pressure switches and limit switches for furnaces of that age are still easy to find, either from the manufacturer or as universal parts built to the same specs. Control boards are the part most likely to be discontinued, and a universal board often fills in. What we won't do is patch a cracked heat exchanger, so that finding turns the talk toward replacement.
Who do we call about a gas smell at our Hanover house?
Leave the house first, then call your gas utility from outside. In Hanover that can be CenterPoint Energy or Xcel Energy depending on your street, so check a recent bill now and save the emergency number before winter. Once the utility has made things safe, we can repair the furnace or its gas valve, with the same $79 trip charge and written price on either side of the river.
More in Hanover
- Furnace replacement in Hanover
- AC repair in Hanover
- AC replacement in Hanover
- All HVAC service in Hanover
Furnace repair near Hanover
- Saint Michael, MN 4 mi
- Rockford, MN 6 mi
- Albertville, MN 6 mi
- Rogers, MN 6 mi
- Loretto, MN 7 mi
- Corcoran, MN 7 mi
Brands we repair
Guides on furnace repair
Lennox Furnaces Compared: Merit vs Elite vs Dave Lennox Signature
How to decode a Lennox furnace model number, what really separates Merit, Elite and Dave Lennox Signature, and which one fits a Minnesota house and budget.
Read the guideFurnace Repair Cost in Minnesota (2026)
Furnace repair pricing in Minnesota for 2026: a $79 trip charge waived with the repair, written flat-rate prices, national part costs and when to replace.
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Furnace repair in Hanover? Call or send a request.