Furnace Repair Services We Handle
- Diagnostic and repair for gas and electric furnaces
- Ignition and pilot light repair
- Thermostat troubleshooting and replacement
- Blower motor and heat exchanger repair
- Airflow and ductwork issues affecting heating performance
- Emergency no-heat calls
Signs Your Furnace Needs Repair
- No heat, or heat that's noticeably weaker than it used to be
- The furnace short-cycles — turning on and off repeatedly instead of running a full cycle
- Banging, rattling, or grinding noises during operation
- Blowing cold air when it should be blowing warm
- Rising energy bills without a change in how you're using the system
- A pilot light that won't stay lit, or any smell of gas near the unit — stop and call, don't keep relighting it yourself
Why Is My Furnace Blowing Cold Air?
Three causes cover most of these calls. A dirty air filter restricts airflow badly enough that the system trips a safety limit before it fully heats the air moving through it. A failed igniter or pilot means the burners aren't lighting even though the blower is still running and pushing air. Or the thermostat is set to "fan on" instead of "auto," which circulates unheated air between heating cycles instead of only when the furnace is actively firing. A technician can usually rule these in or out on the same visit.
Repair or Replace?
Age and repair history are the two things to weigh. A furnace over 15 years old that needs a repair is often better replaced than patched again — the math tips toward a new unit once you're paying for the second or third repair in a year on an aging system. A cracked heat exchanger is a different situation entirely: it's a carbon monoxide safety issue, not something to repair, and it usually means replacement regardless of the furnace's age. A younger furnace with an isolated issue — a failed igniter, a bad blower capacitor — is normally a straightforward repair. Beyond age and repair count, it's worth factoring in efficiency: an old furnace running at a lower AFUE rating than a current model is quietly costing more to run every winter it stays in service, which narrows the cost gap between "keep repairing it" and "replace it" more than most homeowners expect.
My Furnace Won't Turn on at All
Start with the basics before assuming the worst: check that the thermostat is set to heat and above room temperature, confirm the furnace switch (often mounted like a light switch near the unit) hasn't been bumped off, and check the breaker or fuse serving the furnace. If those all check out and the unit still won't fire, the likely culprits are a failed igniter or pilot assembly, a tripped flame sensor safety, or a bad control board — all things that need a technician's tools to diagnose safely rather than guesswork.
Gas Furnace Repair vs. Electric Furnace Repair
Gas furnaces add combustion safety to the list of things a repair has to get right — venting, gas line integrity, and carbon monoxide risk from a cracked heat exchanger or a blocked flue. Electric furnaces skip the combustion side but bring their own failure points: heating elements, sequencers, and higher amperage electrical connections that need to be sized and wired correctly. Both require a licensed technician, but the diagnostic path and the parts involved are different, which is part of why we ask what type of furnace you have before dispatching.
Cutting Down on Future Breakdowns
Most no-heat calls trace back to something that a routine furnace tune-up would have caught months earlier — a dirty filter restricting airflow, an igniter nearing the end of its life, or a blower motor starting to strain. An annual tune-up before heating season won't eliminate every breakdown, but it catches the wear-and-tear issues while they're still an inspection line item instead of an emergency call.
What to Expect When You Call
A technician inspects the system, tests the components most likely to be causing the symptoms you're describing, and explains what's wrong before doing any work. You get a written estimate before repairs start — never a surprise number after the fact. Most single-issue repairs, like a failed igniter or a bad thermostat, are finished same-visit; problems that need an ordered part may take a return trip, and we'll tell you that up front rather than after the first visit. If the part is common — an igniter, a capacitor, a thermostat — it's often already on the truck.
Furnace Repair Across the Treasure Valley
We repair furnaces across Caldwell, Boise, Meridian, Nampa, and the rest of the Treasure Valley from our shop on Commercial Way in Caldwell. Our technicians are licensed, background-checked, and give you an upfront estimate before any work begins.
Call (208) 782-8267 and a real person answers — no phone tree, no call center. Family-owned, veteran-owned, and Treasure Valley-based since day one. Same-day service when you call early, and emergency appointments when a no-heat call can't wait for a normal opening.
Frequently asked questions
What are common furnace issues that require repair?
Common problems include a lack of heat, unusual noises, and cycling issues where the furnace turns on and off frequently. Other issues may involve pilot light problems, faulty thermostats, or airflow restrictions caused by dirty filters.
My furnace is blowing cold air — what's the likely issue?
Usually it's a dirty air filter restricting airflow, a pilot light or igniter that's failed so the burners aren't lighting even though the blower is running, or a thermostat set to "fan on" instead of "auto," which circulates unheated air between heating cycles. A technician can typically rule these in or out quickly.
How long does furnace repair take?
Minor repairs, such as replacing a filter or fixing a thermostat, may take as little as an hour, while more extensive repairs can take several hours or even a full day. Some situations may require ordering parts, which can extend the timeline.
Who should I call when my furnace stops working?
A licensed HVAC technician rather than a general handyman, since furnace repair involves gas connections, electrical components, and combustion safety, including carbon monoxide risk, that require the right certifications. American Rooter & Drain's technicians are licensed and available for same-day calls when you call early.
When should I consider a new furnace instead of a repair?
If your furnace is over 15 years old or has needed multiple repairs in the past year, replacement is usually the more cost-effective call. A cracked heat exchanger is also a reason to replace rather than repair, since it's a carbon monoxide safety issue rather than a routine part failure.
