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 Hopkins, MN
The $79 trip charge on a Hopkins furnace repair is waived as soon as you approve the work, and you see the written price before any of it starts. We're open 7 days, 7am–9pm, and that includes condos and apartments where the furnace lives in a hallway closet.
Furnace repair calls in Hopkins homes
Two kinds of furnace calls come up often in Hopkins. The first is the tight basement near Mainstreet, where the furnace sits wedged against the water heater and a blower motor or inducer swap takes some planning just to get the old part out the front. The second is the condo or apartment closet furnace. Those units breathe through a louvered door, share space with storage and often drain into a small condensate pump, so many of our fixes there come down to airflow, combustion air and drainage.
The 1950s and 1960s ramblers around Interlachen Park usually have roomier basements and a furnace on its second or third generation. Near Minnehaha Creek, damp lower levels leave rust on burners and flame sensors, and a sensor coated with corrosion is a common reason a furnace lights, runs a few seconds and shuts down.
Updated September 23, 2026
How much does furnace repair cost in Hopkins?
Every furnace repair call in Hopkins starts with a $79 trip charge, waived when you approve the repair, and a written price before any work. Same prices in Hopkins 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.
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 Hopkins: questions
What goes wrong with the closet furnace in our Hopkins condo?
Mostly airflow and air supply. A closet furnace needs the louvered door or grilles the installer provided, and boxes stacked against it starve the burners and the blower. Filters in those slide-in slots get forgotten. Many closet units drain into a condensate pump, and when its float sticks, the safety switch shuts the furnace down. Check the filter and the pump first. If your association controls the vent or roof, we'll coordinate with them.
Can you work on a furnace squeezed next to the water heater in a small Hopkins basement?
Yes. Most repairs, including the igniter, flame sensor, inducer, pressure switch and control board, happen through the front panel. A blower motor is the tricky one, because the blower assembly slides out the front and needs about a furnace's depth of clear floor. Moving storage and laundry baskets out of the way before we arrive saves time. If a furnace truly can't be serviced where it sits, that matters for the next replacement.
More in Hopkins
- Furnace replacement in Hopkins
- AC repair in Hopkins
- AC replacement in Hopkins
- All HVAC service in Hopkins
Furnace repair near Hopkins
- St. Louis Park, MN 4 mi
- Edina, MN 4 mi
- Minnetonka, MN 5 mi
- Eden Prairie, MN 6 mi
- Wayzata, MN 6 mi
- Golden Valley, MN 6 mi
Brands we repair
Guides on furnace repair
Furnace Won't Ignite: Find Where the Startup Stops
Furnace clicking but not lighting? Follow the startup sequence a technician uses: thermostat, power, inducer, pressure switch, igniter, gas and flame sensor.
Read the guideWhat Does a Furnace Pressure Switch Do, and Why Does It Keep Tripping?
A furnace pressure switch proves the inducer is venting exhaust before the gas can open. Why it trips in a Minnesota winter, what you can check, and the cost.
Read the guideContact Us
Furnace repair in Hopkins? Call or send a request.