Why is my furnace running but not blowing hot air?
Start with the thermostat and filter. A dirty filter, a bad igniter, or a failing flame sensor can cause it. If the quick checks do not help, ask a provider to diagnose it.
Furnace trouble is stressful. It is worse when the weather turns cold. Here is the short version: check for gas smell first, run a few quick checks, then talk to a local provider. Orangeothers Heating & Air is a referral service. We do not do the work. We connect you with independent providers in our network.
This page gives you plain tools to hire well. You will see the questions to ask, what a good answer sounds like, and the red flags to watch for. You will also see typical U.S. price ranges. Prices vary by job, so always get a written quote. Providers set their own rates and their own schedules. Many can respond quickly, but availability depends on the day and the season.
Smell Gas? Leave the House
If you smell gas, get everyone out. Do it first. Think about the furnace later.
Do not flip light switches. Do not use a lighter or a phone inside. From outside, contact your gas utility or emergency services. Wait for them to say the home is safe.
Carbon Monoxide Alarm Sounding?
Treat it as real. Move outdoors and get fresh air. Dizziness, headaches, and nausea are warning signs. Do not run the furnace again until a qualified provider has checked it.
Once everyone is safe, Request a callback to ask about provider availability for a furnace inspection.
Quick Checks Before You Book
Some fixes take two minutes. Try these only if there is no gas smell and no alarm.
Check the Thermostat
Set it to heat. Set the temperature a few degrees above the room. Swap the batteries if the screen is blank.
Check the Filter
A clogged filter chokes airflow. The furnace may shut off to protect itself. Replace the filter if it looks gray and packed.
Check Power and the Switch
Furnaces have a switch that looks like a light switch, often near the unit. Someone may have flipped it off. Also check the breaker.
Check the Vents
Open the registers. Move furniture and rugs off them. Blocked vents cause weak heat and uneven rooms.
Signs Your Furnace Needs Repair
Some signs mean book a visit soon. Do not wait for a full breakdown.
Odd Noises
Banging, squealing, or grinding means something is wrong. A belt, bearing, or blower part may be failing.
Short Cycling
The furnace starts, runs briefly, and stops. Then it repeats. That wears parts fast and wastes fuel.
Uneven or Weak Heat
Some rooms stay cold. Air feels lukewarm. This can point to the blower, ductwork, or a clogged filter.
Yellow or Flickering Flame
A healthy gas flame is steady and blue. A yellow flame needs a provider. Stop using the unit until it is checked.
What a Repair Visit Looks Like
Expect a clear process. The provider checks the thermostat, filter, and power. Then they inspect the igniter, flame sensor, blower, and controls. They test the safety switches. They look at the vent and heat exchanger.
Then they explain what they found. Ask for the price before work starts. Quote in writing.
Common Furnace Repairs
Most calls involve a short list of parts. Igniters and flame sensors fail often. Blower motors and capacitors wear out. Control boards fail after power surges. Cracked heat exchangers are less common but serious.
Cold, dry winters and big temperature swings make furnaces work hard. Severe spring storms can also trip power and stress controls. Regular tune-ups catch small problems early.
Repair or Replace Your Furnace?
Here is a plain rule. If the repair costs more than about half the price of a new unit, think about replacing it. Age matters too. Many furnaces last 15 to 20 years.
Replace when the heat exchanger is cracked. Replace when repairs keep coming back. If you search furnace replacement near me, ask for a written quote on sizing and installation, not just the unit.
Some homes, like ranch houses with basements, have unusual duct runs. Sizing matters. A unit that is too big or too small wastes money.
Ask Before You Hire
Good HVAC service starts with good questions. Ask them on the phone. Write down the answers.
Questions to Ask
- Are you licensed in my state, and can I see proof?
- Do you carry liability insurance?
- Is there a diagnostic fee? Does it apply to the repair?
- Will you give me the price in writing before work begins?
- Do you offer a warranty on parts and labor?
What a Good Answer Sounds Like
A good provider answers directly. They give numbers. They explain the fix in plain words. They tell you what is urgent and what can wait.
Red Flags
- Pressure to decide on the spot
- A price that changes with no new findings
- No written quote
- Demands for full payment up front
- Pushing a new furnace before testing the old one
Why a Written Quote Matters
A written quote protects you. It lists parts, labor, and fees. It lets you compare two providers fairly. It also stops surprise charges at the end.
If the scope changes, ask for an updated quote before work continues.
What Drives the Price
Parts cost, labor time, and furnace age all move the number. Hard-to-reach units cost more. So do rare parts. After-hours visits may add fees. Ask about that up front.
Heating and Cooling Under One Roof
Many providers handle both heating and cooling. That helps if your system is a combo setup. Summer problems are a different job. For Emergency AC repair, see the AC page.
Ready to Compare Providers?
Start with the safety steps. Run the quick checks. Then ask the questions above. Pick the provider who answers clearly and quotes in writing.
What's Included
Fault Diagnosis
The provider tests the thermostat, igniter, sensor, blower, and safety switches to find the actual cause.
Part Repairs
Common fixes include igniters, flame sensors, capacitors, and blower motors, depending on what fails.
Safety Checks
Providers can check the vent, flame, and heat exchanger for carbon monoxide risks.
Written Estimate
You should get parts, labor, and fees spelled out in writing before any repair work begins on your furnace.
Typical Furnace Repair Costs
These are typical U.S. ranges. Your price depends on the part, the furnace age, and how hard the unit is to reach. Always get a written quote before work starts.
| Item | Typical range | Notes |
|---|---|---|
| Diagnostic visit | $75 – $200 | Some providers apply it to the repair |
| Flame sensor service | $100 – $300 | Cleaning costs less than replacing |
| Igniter replacement | $150 – $500 | Common wear part |
| Blower motor | $400 – $1,500 | Price rises with motor type |
| Control board | $300 – $900 | Often tied to power surges |
| Furnace replacement | $3,800 – $10,000 | Varies by size and efficiency |
How It Works
Check Safety First
Gas smell or alarm? Leave the house, then contact your gas utility or emergency services.
Run Quick Checks
Look at the thermostat, filter, switch, and vents. Some fixes take only minutes.
Reach a Provider
Request a callback to check availability, or request an estimate through the form.
Compare and Choose in Writing
Ask your questions, get a written quote, and pick the provider that fits.
Why Call Orangeothers Heating & Air
Ask Before You Hire
Plain questions and clear answers help you spot a solid provider before you let anyone touch the furnace.
Honest Ranges
See typical U.S. prices first, so a quote does not catch you off guard.
Independent Providers
Providers in our network run their own work and set their own prices and schedules.
No Obligation
Request an estimate and compare. You decide whether to hire, and who.
Other Services
Need furnace repair in Kansas City?
Tell us what your system is doing. Request an estimate, or Request a callback to check provider availability. A local provider in our network can take it from there.
No obligationFAQ
Furnace Repair FAQ
How much does furnace repair cost?
Most repairs fall between about $150 and $1,500 in the U.S., depending on the part. Ask for a written quote before work starts.
When should I replace my furnace instead of repairing it?
Think about replacing it if it is over 15 years old, has a cracked heat exchanger, or needs repairs that cost about half a new unit.
Contact Us
Request a callback
Tell us what your system is doing. Request an estimate, or Request a callback to check provider availability. A local provider in our network can take it from there.
No obligation