Furnace Won't Ignite: Find Where the Startup Stops
Furnace clicking but not lighting? Follow a technician's startup sequence, from power and inducer to igniter, gas and flame sensor, then call 612-429-3465.
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Furnace repair in Brooklyn Center's 1950s and 60s houses starts with a $79 trip charge, waived when you say yes to the repair. Boxed-in return drops in finished basements are a common reason a furnace here overheats and trips its limit switch.
Because Brooklyn Center filled in almost all at once, its furnaces tend to share a replacement cycle, and many of the 80% models put in during the 1990s and 2000s still vent into the original chimney beside a gas water heater. When that chimney's draft weakens, from a cold flue, a crumbling clay liner or a blocked cap, the flame rollout or spill switch can shut the furnace down, and the water heater may be spilling exhaust too.
Finished basements shape the rest. Many were finished without much thought for the furnace, so the return drop got boxed in or a wall now sits inches from the service panel. A furnace that can't breathe overheats and trips its limit switch, and one we can't open without pulling trim takes longer to fix. Ducts running through the joists above finished ceilings also hide disconnected runs that leave a bedroom cold.
Updated November 10, 2026
National averages (HomeGuide, 2026), not our prices: a limit switch $100–$375, a control board $300–$650, an inducer motor $400–$1,100. More in the furnace repair cost guide.
Symptom guides: Burning smell · Red tag · Carbon monoxide · Blowing cold air · Signs your furnace needs a technician
Don't make a habit of it. That's usually the flame rollout switch, which trips when flames escape the burner area, often because the chimney isn't drafting or the heat exchanger is blocked or cracked. Pushing it once to get heat back is understandable, but if it trips again, leave the furnace off and call us. Diagnosis covers chimney draft, the burners and the heat exchanger, plus a carbon monoxide test.
Usually the furnace is fine and the duct to that room isn't. In 1950s and 60s ramblers, supply runs travel through the basement joists, and once the ceiling below is finished, a disconnected or crushed run can hide above the drywall. Corner bedrooms lose heat fastest. We measure airflow at the register and check the trunk and takeoffs we can reach. If the duct is buried, a small access panel usually beats tearing out a ceiling.
Furnace clicking but not lighting? Follow a technician's startup sequence, from power and inducer to igniter, gas and flame sensor, then call 612-429-3465.
Read the guideTrane and American Standard furnaces share one control board and flash chart in the maker's guide. See each code, how to read it safely, and when to call.
Read the guideA red tag means a technician or the gas utility found your furnace unsafe and shut it off. Common reasons, what not to do, and how to get a second opinion.
Read the guideHeat out? AC quit? Call or send a request.