Furnace Repair in Youngstown, OH

Signs your furnace needs repair

A furnace usually gives a specific symptom before it quits altogether. These are the ones worth a call:

It clicks but never lights. You hear the inducer fan start and the igniter click or glow, but no flame follows.
It lights, then goes out within seconds. The burners fire, run for 3 to 10 seconds, and shut off. The furnace may retry 3 times and then lock out.
It runs a few minutes and shuts down. Heat starts, the blower runs, then the burners cut out while the blower keeps going.
The blower runs but the air is cold. The fan moves air through the vents with no heat behind it.
New noises. A boom at startup, a metal-on-metal scrape, a high squeal, or a rattle from the vent pipe.
Yellow or lifting flames. Burner flames should be steady and blue. Yellow, wavering, or rolling flames are a combustion problem.
A blinking light on the control board. Most furnaces flash a fault code. The key to the code is on the inside of the blower door.

Why a gas furnace stops heating: Common causes

The symptom usually points to a short list of parts.

Dirty flame sensor. A thin metal rod proves the burners are lit. When it gets coated, the board can't see the flame and shuts the gas off. This is the most common cause of a furnace that lights and drops out.
Failed hot surface igniter. Igniters are brittle and crack with age. No glow means no ignition.
Tripped high limit switch. The furnace is overheating, almost always from restricted airflow: a clogged filter, closed registers, a dirty blower wheel, or undersized ductwork.
Pressure switch fault. The switch confirms the vent is drawing. A blocked vent pipe, a cracked hose, a weak inducer motor, or a clogged condensate drain on a high-efficiency furnace will hold it open.
Blower or inducer motor failure. Worn bearings squeal first, then the motor seizes. A failed run capacitor produces a hum with no rotation.
Gas valve or control board failure. Less common and more expensive. These are confirmed by testing voltage at the valve before any part is ordered.

What a furnace repair visit involves

The technician starts by reading the fault code and watching the furnace go through a full ignition sequence: inducer start, pressure switch closing, igniter, gas valve, flame proving, blower. Where the sequence breaks tells us which circuit to test.

From there the work is measurement. Voltage to the igniter and gas valve, flame sensor current, gas pressure at the manifold, temperature rise across the heat exchanger, and static pressure in the ductwork if the furnace is overheating. On a high-efficiency furnace the condensate trap and drain are checked and cleared.

Once the failed part is confirmed, we tell you what it is and what it costs. After the repair the furnace is run through several cycles, the temperature rise is compared to the range on the rating plate, and the heat exchanger and venting are inspected for cracks, rust, and signs of flue gas spillage. You're told about anything that's wearing out, even if it's still working that day.

How Youngstown's older ductwork causes furnace shutdowns

Roughly 4 in 10 homes in Youngstown were built before 1940, and many of them were originally heated by a coal-fired gravity furnace. Those systems had wide supply pipes and one or 2 large return grilles on the first floor. When the gravity furnace was replaced with a forced-air gas furnace, the old ductwork often stayed.

The result is a furnace that can't pull enough return air. It heats up faster than the blower can carry the heat away, the high limit switch opens, and the burners shut off. The homeowner sees a furnace that runs for 5 minutes, stops, and starts again all night.

The limit switch is doing its job, so a new switch trips the same way. On houses like this we measure static pressure and temperature rise, and if the ductwork is the cause we say so. Sometimes the answer is ductwork repair such as an added return duct, a less restrictive filter, or a blower speed adjustment.

If the furnace is also near the end of its life, that airflow problem needs to be solved as part of a furnace replacement, or the new one will do the same thing.

Furnace repair cost: What affects the price

Furnace repair cost depends mostly on which part failed and how long it takes to reach and test it.

Part cost. Flame sensor cleaning, an igniter, or a capacitor sits at the low end. Inducer motors, blower motors (especially variable-speed ECM motors), gas valves, and control boards cost considerably more.
Furnace type. High-efficiency condensing furnaces have more components: a secondary heat exchanger, condensate trap, and sealed combustion parts.
Age and brand. Older furnaces may need a universal or special-order part.
Location. A furnace in an open basement is quicker to service than one in a crawl space or a closet with the door framed in.
Underlying cause. If a clogged drain shorted a board, or overheating warped something, the repair grows.
Time of the call. After-hours emergency service can cost more than a scheduled visit.

You get the price for your specific repair after diagnosis and before the work is done.

When you need emergency furnace repair

Treat it as urgent and call immediately if:

The house has no heat and it's at or below freezing outside. Pipes in exterior walls can freeze within hours once the indoor temperature drops.
A carbon monoxide alarm is sounding. Get everyone outside first, then call 911.
You see soot around the furnace, scorch marks on the cabinet, or flames rolling out of the burner compartment.
You smell burning plastic or electrical odor from the furnace.

If you smell gas, leave the house and call 911 and Enbridge Gas Ohio from outside. Our 24/7 emergency HVAC repair page explains what to do while you wait for a technician.

Furnace not working? What to check before you call

4 things cause a surprising number of no-heat calls and take 2 minutes to rule out: the thermostat is set to heat with fresh batteries, the furnace switch on the wall or the side of the unit is on, the breaker hasn't tripped, and the filter isn't packed with dust. If the furnace vents through plastic pipes on the side of the house, make sure snow or ice isn't blocking them. If all of that checks out, turn the furnace off rather than letting it keep trying to start, and call.

After a furnace repair: What to watch for

Change the filter on the schedule the technician gives you, since restricted airflow causes repeat failures, and book a yearly furnace tune-up to catch worn igniters and sensors early. Listen to the first few startups.

If the original symptom returns within days, call back, because that usually means a second fault was hiding behind the first. HVAC Guy also services the rest of the system, so if your home has radiators instead of ducts, see boiler repair, and for the full list of what we do, see our heating and cooling services in Youngstown.

Furnace repair questions from Youngstown homeowners

Why does my furnace turn on and off every few minutes?

That's called short cycling. The 2 usual causes are a dirty flame sensor, which shuts the burners off within seconds, and an overheating furnace that trips its high limit switch after a few minutes. Overheating comes from a clogged filter, blocked vents, or ductwork that's too small for the furnace.

Can I clean the flame sensor myself?

Some homeowners do, but the power and gas need to be off, the sensor is fragile, and a furnace that keeps fouling its sensor has another problem such as poor grounding or dirty burners. If cleaning doesn't hold for a full season, have the furnace tested.

How long does a furnace repair take?

Most repairs are done in one to 2 hours when the part is common, such as an igniter, flame sensor, capacitor, or pressure switch. Motors and control boards for less common furnaces sometimes have to be ordered, which means a second visit.

Is a cracked heat exchanger repairable?

No. A cracked heat exchanger can let combustion gases into the air stream, and it isn't patched or welded in the field. The options are replacing the heat exchanger if it's under manufacturer warranty, or replacing the furnace.

Why does my furnace smell like burning when it first comes on in the fall?

Dust that settled on the heat exchanger over the summer burns off in the first hour or 2 of the season. That smell should fade the same day. A sharp electrical or plastic smell, or one that keeps coming back, isn't normal and should be checked.