A furnace that won't light or keeps shutting off needs real diagnosis, not another reset. Every visit includes a carbon monoxide safety check, standard, not an upsell.
A short list of components causes most Furnace Repair calls: ignitor, flame sensor, gas valve, heat exchanger. We test with real equipment, not parts-cannon guessing.
What doesn't change from visit to visit.
A combustion analyzer reading for dangerous CO levels is part of every visit, not optional.
We bump no-heat calls ahead of routine visits when it's cold.
Ignitor or heat exchanger, the price is quoted and approved before work begins.
Both fuel types get the same trained tech, no exceptions.
The most common furnace failure points.
These two parts are behind most no-heat visits, usually a same-visit fix.
Gas valve testing confirms the fault before we recommend replacing it.
A cracked heat exchanger can leak combustion byproducts into the airflow — we inspect with a scope and analyzer rather than assuming based on age.
We test both before condemning the control board.
We still service older standing-pilot systems that newer ignition doesn't have.
We rule out wiring issues first to avoid overcharging for parts you don't need.
Four steps, safety checked at every one.
Tell us what the furnace is doing and we'll get someone moving.
A stocked truck arrives ready to diagnose and often repair same visit.
Combustion analysis happens before any repair is quoted, then a flat-rate quote.
Most repairs finish same visit, with a final CO check before we leave, backed by warranty.
Feedback from completed furnace repairs.
Pilot light kept going out on our older furnace every few days. Tech identified a failing thermocouple that two other companies had overlooked.
— H. Delacroix, homeowner
Furnace made a loud bang on startup that scared the whole family. Turned out to be a delayed ignition issue from a dirty burner, cleaned and resolved same visit.
— F. Ibekwe, homeowner
Called about a gas smell near the furnace closet and they had someone here within the hour to confirm it was safe before doing any repair work.
— Q. Whitmore, homeowner
Landlord here with an older building, they've kept three separate furnace units running through two winters without a single emergency callout.
— Z. Andreou, landlord
What Onslow customers ask most.
We always confirm with a proper reading before quoting.
Yes — it can let combustion gases into breathing air, we won't run a confirmed-cracked unit, taken seriously.
A CO check is standard on every call, no upcharge.
We still service these older systems.
We prioritize no-heat situations even during high demand.
Uncommon parts might mean a follow-up visit to finish the repair.
Our furnace repair coverage spans Onslow and nearby Onslow, IA zips below — call to confirm.
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