Furnace repair in Hermantown, MN
Repair for the high-efficiency furnaces most Hermantown homes have, on natural gas or propane, and for heat pumps that hand off to a furnace in the cold.
Service ticket · Hermantown
Newer-furnace faults
Water under the furnace
Shuts down in a snowstorm
Error light blinking on the control board
Heat pump runs, house still cold
Gurgling from the drain line
Propane tank low in a cold snap
Furnace repair in Hermantown: the condensing-furnace calls
Furnace repair in Hermantown, MN, for natural gas furnaces in the newer neighborhoods and propane furnaces on the larger lots outside them. With a median home built in 1993, most furnaces here are condensing models: they pull so much heat from the exhaust that water condenses out, and that water and the plastic vent pipes are behind many of the calls.
Condensate drain and pump
A clogged trap or a failed pump backs water up and a safety switch shuts the furnace off.
Intake and exhaust pipes
The two plastic pipes on the side wall drift shut in snow or frost over; the furnace stops to protect itself.
Pressure switch
Tells the board the vent is clear. Water in its tubing or a blocked pipe keeps it open, and the furnace won't light.
Control board codes
The blinking light is a code; the chart is on the door panel. Write it down before you call.
Dual-fuel and heat pump homes
About one Hermantown home in five heats with electricity, and some of those pair a heat pump with a furnace. When that system is set up right, the furnace takes over below a set outdoor temperature. A house that stays cold while the heat pump keeps running usually means the switch-over setting, the outdoor sensor or the furnace itself, not the heat pump.
Propane furnaces outside the gas main
Around 21% of Hermantown homes run on propane, many more than in Duluth. A propane furnace that locks out after the tank runs low needs the supplier's relight first; one that lights and drops out with a full tank is a furnace repair like any other.
Hermantown furnace questions
Before you call from Hermantown.
Why is there water around my furnace?
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A high-efficiency furnace makes water as it runs and drains it away. When the drain, trap or condensate pump clogs or fails, the water backs up. A pump with a full tank that isn't running is a common cause.
My furnace stopped during a snowstorm. Is it broken?
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Often not. Snow or frost blocking the intake or exhaust pipe on the outside wall makes the furnace shut down. Clear both pipes and reset the furnace; if it won't run, call.
Do you work on heat pumps too?
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Yes, including dual-fuel systems where a heat pump and a furnace share the work.
Free quote
What is your furnace telling you?
The symptom and the blink code, if there is one, are enough to start. A call back follows with a few questions, and the price comes before any work.
Furnaces, boilers, air conditioning and heat pumps
Duluth, Superior and the towns around the harbor
The price first, then your decision
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