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Furnace Repair Services in Mount Prospect, IL
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When a furnace stops working in the middle of a Mount Prospect, IL, winter, the temperature inside can fall fast. Pipes along outside walls start to freeze, kids and pets get cold fast, and nobody wants to wait days for a repair slot. Many of those breakdowns come down to a single worn part in a furnace that’s been running hard since November. Furnace repair finds the failed part, fixes it safely, and gets heat back into the house before the cold does real damage.
Gas Furnace Repair From Intelligent Service
Intelligent Service is a family-owned company in Mount Prospect, IL, that repairs gas furnaces for homes throughout the northwest suburbs. Our technicians keep training as furnace controls and components change, so they can diagnose newer furnaces as confidently as older ones.
Furnaces don’t break on a schedule, so we’re available 24/7 for emergency furnace repair, nights and weekends included. When you approve a recommended repair, our lifetime replacement guarantee covers it for as long as you own your home. We also handle tune-ups and full replacements when a repair no longer makes sense.
Signs Your Furnace Needs Repair
Some furnace problems are obvious, and others start as small changes that are easy to ignore. Call for service if you notice any of these:
- Furnace not heating: The blower runs but the air from the vents feels cool or barely warm.
- Furnace won’t turn on: Nothing happens when the thermostat calls for heat, which often points to a power, switch, or control board issue.
- Furnace making noise: Squealing suggests a blower motor or belt problem, while booming at startup can mean delayed ignition.
- Constant on-and-off cycling: Short cycles can come from an overheating furnace, a dirty flame sensor, or a thermostat issue.
- Burner won’t stay lit: The burners light, then shut off seconds later, a common sign of a dirty or failing flame sensor.
- CO alarm sounding: If a carbon monoxide detector goes off, get everyone outside and call the fire department before anything else.
A small problem caught early is usually a quicker, cheaper fix than a furnace that’s been forced to run with a failing part.
Furnace Troubleshooting and Repairs
A few quick checks can sometimes get the heat back on before a technician arrives. When they don’t, we track down the actual cause instead of guessing.
Common Furnace Repairs We Handle
Most furnace breakdowns trace back to one of these parts:
- Igniters: Hot surface igniters crack and burn out with age, leaving the burners unable to light.
- Flame sensors: A coated or worn sensor tells the furnace the flame went out, shutting down the burners.
- Blower and inducer motors: Worn bearings and failing capacitors stop air from moving or venting properly.
- Control boards: Power surges and age can knock out the board that runs the heating sequence.
- Pressure and limit switches: These safety switches shut the furnace down when venting or temperatures aren’t right.
- Thermostats: Dead batteries, bad wiring, or a failing thermostat can look like a broken furnace.
Before you schedule, check that the thermostat is set to heat, the filter isn’t clogged, the breaker hasn’t tripped, and the furnace door is fully closed. If none of that brings the heat back, it’s time for a technician.
Related Services
Many repairs we make in January could’ve been caught in the fall. Yearly furnace maintenance cleans and tests the parts most likely to fail.
When a furnace is older and the repairs keep adding up, we’ll talk honestly about furnace installation and replacement. You can see everything we handle on our heating services page.
Get Your Heat Back On in Mount Prospect
A cold house only gets colder, so don’t wait on a furnace that’s acting up. You can request furnace repair online, and we’ll send a technician to find the problem and explain your options. Before anyone arrives, you’ll get a photo of the technician headed to your door.
Frequently Asked Questions
Furnace repair cost depends on which part failed, the furnace brand and age, and whether the visit happens during regular hours or an emergency call. A flame sensor cleaning is a small job, while a control board or inducer motor costs more. We explain the price before any work starts.
Yes. Our technicians take heating emergency calls at any hour, weekends included. If your furnace quits on a freezing night, you don’t have to wait until morning to get help.
Many common repairs, like replacing an igniter or flame sensor, can be done in a single visit when the part is on hand. Less common parts, such as some control boards or inducer motors, may need to be ordered. We’ll tell you up front how long the repair should take.
