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.
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Long Lake is small, and so is the fine print on our furnace repair: a $79 trip charge that's waived when you approve the repair, and a written price before any work. We're open every day, 7am–9pm. Many furnaces here are oversized for houses that have been reinsulated since they were built.
Most Long Lake houses are postwar and 1960s ramblers and story-and-a-halfs that have been reinsulated and re-windowed, so the furnace heating them is often bigger than the house now needs. An oversized furnace runs in short bursts, and all those starts wear igniters, inducers and relays. Short cycles also keep an 80% furnace's flue cool, so condensation rusts the vent connector and can damage the chimney.
The mechanical corner is usually shared with the water heater, the laundry and sometimes a water softener. Dryer lint drifts into the return and the burner area, and bleach or other laundry chemicals stored near a furnace can corrode it from the inside, since the furnace draws that air for combustion. The early-1900s houses near the old main street add tight basements and older ductwork, and the newer townhomes have compact furnaces with their own access limits.
Updated September 23, 2026
Every furnace repair call in Long Lake starts with a $79 trip charge, waived when you approve the repair, and a written price before any work. Same prices in Long Lake as in every town we serve. National averages (HomeGuide, 2026), not our prices: a variable-speed (ECM) blower motor $800–$2,300, an igniter $100–$250, a flame sensor $80–$250. More in the furnace repair cost guide.

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
It can. Dryer lint gets pulled into the return and settles on the blower and burners, and a lint-clogged filter chokes airflow. Chlorine bleach, detergents and other laundry chemicals give off vapors that the furnace draws in for combustion, and those vapors turn corrosive in the flame, attacking the heat exchanger and venting. Store chemicals away from the furnace, keep the dryer vent connection tight, and change the filter more often.
Short cycling has a few causes. A dirty flame sensor makes the furnace light and shut down within seconds. A clogged filter or blocked return lets it overheat and trip the high limit. A thermostat mounted near a supply register or in direct sun cuts cycles short. And an oversized furnace in a reinsulated house heats so fast that it shuts off early. We sort out which one it is before replacing anything.
Furnace clicking but not lighting? Follow the startup sequence a technician uses: thermostat, power, inducer, pressure switch, igniter, gas and flame sensor.
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