Why is my furnace running but not heating the house?
Common causes are a dirty filter, a faulty thermostat, a failing blower or a burner problem. Try the quick checks first. If heat is still weak, ask a local provider to inspect it.
A cold house feels scary, especially when the furnace is old and you are not sure what it needs. Take a breath. Most furnace problems have a clear cause, and a local provider can find it. Permanentworth Heating & Air is a referral service that connects homeowners in Springfield with independent providers who do furnace repair.
This page is written for first-timers. It explains the warning signs, the quick checks that are safe to try, and what a repair visit looks like. It also covers the quirks of older homes, like patched ductwork and tight basement furnace rooms. Permanentworth Heating & Air does not do the repair. A provider in our network does the hands-on work, and you stay in charge of every decision.
A rotten-egg smell can mean a gas leak. Do not flip switches, light anything or use a phone inside. Walk out, then call 911 or your gas utility from outside.
Wait for the all-clear before you go back in. The furnace repair can wait. Your safety cannot.
If a carbon monoxide alarm sounds, get everyone and the pets into fresh air. Then call 911. Headaches or dizziness that fade when you leave the house are a warning sign too.
It is normal to feel worried. Here is one clear step: try a few safe checks, then ask a local provider for help. Many providers can respond quickly, though availability varies. Request a callback to check provider availability.
These take a few minutes and need no tools.
Do not open sealed panels or try to relight a pilot unless your manual says how. If the checks do not help, that is useful news to share with the provider.
In a hard freeze, open cabinet doors under sinks. Let a faucet drip. Close off unused rooms and use blankets. Full basements and stone foundations lose heat fast, so pipes there need extra attention.
Furnaces usually warn you first. Listen for small changes.
Banging, squealing, rattling or grinding is not normal. A short hum is fine. A loud scrape is worth a visit.
If the furnace turns on and off every few minutes, that is called short cycling. It wears parts out and wastes fuel.
Some uneven heat is common in older homes. But a room that was warm last winter and is cold now deserves a look. Ducts may be loose, blocked or crushed.
A healthy gas flame is mostly blue. A lazy yellow flame, soot or a burning smell should be checked by a provider.
Older houses hide surprises. Past repairs may have left odd duct runs or mixed parts. Furnace rooms in basements can be tight. Cape Cod style homes may have heat lines tucked into low spaces. Multi-family buildings can share flues or vents.
Tell the provider what you know about past work. Older insulation near pipes or ducts may need special care, so ask the provider to point it out before anything is touched. Older homes, gentle care.
The provider listens first. They check the thermostat, the filter, the burners or igniter, the blower and the vents. They test safety controls and look for cracks or leaks.
Then they explain what they found in plain words. You should hear the problem, the fix and the price before work starts.
A repair often makes sense when the furnace is fairly young and the fix is small. Replacement may be worth a look when the unit is very old, repairs keep stacking up, or the heat exchanger is cracked.
If you search for furnace replacement near me, remember it is a big choice. Take your time when the house is safe and warm. Ask a provider to compare both paths in writing. Heating and cooling equipment lasts many years, so a calm decision pays off.
Ask before you agree. Good questions are not rude. They are smart.
Write down the date, the symptoms and what the provider said. If you ever need an insurance claim, some policies may cover sudden damage, so check your policy. Providers can often help document damage for a claim.
You do not need to know furnace terms to get good HVAC service. Describe what you see and hear. Ask for plain answers. Then request a callback to ask about a provider in your area.
A provider checks the thermostat, igniter, blower and vents to find why your furnace stopped heating.
Controls, vents and flame are tested so you know the furnace is safe to run.
The provider explains the problem and the repair in plain words before starting.
Ask for the cost, the parts and the work in writing so you can decide calmly.
Prices vary by home, fuel type and the part that failed. These are typical U.S. ranges only. Older homes can add time, so always ask for a written quote before work begins.
| Repair item | Typical range | Notes |
|---|---|---|
| Diagnostic visit | $75 – $200 | Often applied to the repair if you proceed |
| Igniter or flame sensor | $120 – $350 | Common, small part |
| Thermostat replacement | $100 – $350 | Smart models cost more |
| Draft inducer motor | $400 – $900 | Part and labor vary |
| Blower motor | $450 – $1,500 | Depends on motor type |
| Control board | $300 – $800 | Brand and age matter |
If you smell gas or a CO alarm sounds, go outside and call 911 first.
Look at the thermostat, switch, breaker and filter. They take only a few minutes.
Request a callback to check provider availability, or send the request form.
Ask questions, read the written quote and approve only what makes sense.
Simple explanations help first-timers understand the problem before they talk to a provider.
Tips focus on aging ducts, tight basements and past repairs that can surprise you.
You are connected with independent providers who work near Springfield.
No pressure. You compare quotes and choose what feels right.
Tell Permanentworth Heating & Air what is going on with your heating or cooling. Send a short request or reach out by email, and we will point you toward a local provider.
No obligationCommon causes are a dirty filter, a faulty thermostat, a failing blower or a burner problem. Try the quick checks first. If heat is still weak, ask a local provider to inspect it.
Not always. Squealing or banging can mean a worn part. If you smell gas or see soot, turn it off and get help. Otherwise, have a provider look soon.
Age, repair history and the type of problem all matter. A cracked heat exchanger or a very old unit may point to replacement. Ask a provider for both options in writing.
Tell Permanentworth Heating & Air what is going on with your heating or cooling. Send a short request or reach out by email, and we will point you toward a local provider.
No obligation