A modern furnace runs a strict startup sequence, and knowing where the sequence breaks is most of the diagnosis. The thermostat calls, the inducer motor spins up to prove draft through a pressure switch, the hot surface igniter glows, the gas valve opens, the burners light, the flame sensor confirms fire, and only then does the blower deliver heat to the house. In Lehi, UT, the failures cluster at predictable points: a flame sensor coated in oxide that can no longer prove the flame, a hot surface igniter cracked from years of thermal cycling, a pressure switch that will not close because the inducer is weak or the condensate trap on a high-efficiency model has clogged, or a control board with a burned relay. Each one stops the sequence cold, and each one mimics the others from the hallway.
Our experienced technicians diagnose a furnace the way it operates, in order, measuring each stage as it happens. That means igniter resistance, microamp flame signal, pressure switch operation under actual inducer draft, gas valve voltage, and blower and capacitor condition. The safety checks come standard on a gas appliance: heat exchanger inspection, leak testing on the gas connections, and flue draft verification, since a hazard is not visible at the thermostat. We finish by checking temperature rise against the data plate, making sure the burner and blower are matched the way the manufacturer designed them to.
Conventional or condensing, gas, propane, or electric, we repair them all, across every major brand, including the traps, drains, and dual pressure switches that come with high-efficiency models. The parts most likely to fail are stocked on every truck: igniters, flame sensors, pressure switches, capacitors, inducer assemblies, and blower motors. That is why most repairs are finished in a single trip. If your furnace is down anywhere in Lehi, call (385) 206-5812 and we will get the burners lit today.
When the AC quits in summer, see AC Repair in Lehi.
How Much Does Furnace Repair Cost in Lehi?
The typical furnace repair in Lehi lands between $150 and $600. Ignition and sensor problems are usually the least expensive, while blower motors, control boards, and heat exchangers cost more. Every furnace repair starts with a real diagnosis and a clear price.
| Repair | Typical cost | What it usually means |
|---|---|---|
| Flame sensor cleaning or replacementFurnace lights, then shuts off within seconds | $80–$250 | Furnace lights, then shuts off within seconds |
| Hot surface igniter replacementNo ignition; one of the most common winter failures | $150–$400 | Furnace clicks and tries to start but never lights |
| Draft inducer motorLoud humming or grinding at startup, then lockout | $400–$1,000 | Startup fan fails, furnace won't fire |
| Blower motorNo airflow, or the blower runs nonstop | $400–$1,500 | No airflow, or the blower runs nonstop |
| Control boardFurnace won't respond to the thermostat | $300–$700 | Furnace won't respond to the thermostat |
| Gas valve replacementValve fails to open, so the furnace never lights | $250–$700 | Valve fails to open, so the furnace never lights |
Typical ranges for common repairs. Your exact price is quoted after diagnosis.
What Affects the Price
- The age and efficiency of the furnace, since high-efficiency models use more specialized parts
- A cracked heat exchanger, which is a safety issue and usually points to replacement
- Timing, such as a no-heat call on a cold night versus a scheduled repair
- Access to the furnace in attics, closets, or crawlspaces
For older furnaces facing a big repair, we'll show you what replacement would cost too, so you can compare. Call (385) 206-5812 for a quote.
When to Call for Furnace Repair in Lehi
Spotting the early warning signs gives you the chance to act before the situation spirals into something far more expensive. Here are the most common indicators that it's time to call a professional:
- Squeals, scrapes, or grinding noises behind the blower door
- Short cycling every few minutes without reaching the setpoint
- Burners light, run a few seconds, then shut down repeatedly
- Booming or banging at light-off from delayed ignition
- Air moving through the vents that never gets warm
- Water, rust stains, or black soot around the flue or cabinet
- Yellow, wavering burner flames where they should be sharp blue
- The igniter glows and clicks, yet no flame ever appears
Don't Wait for a Total Failure
What seems like a minor issue today can take out a compressor or heat exchanger tomorrow. Call Lehi HVAC at (385) 206-5812 at the first sign of trouble.
Furnace Repair Issues? We Can Help.
Call our expert team for pricing today.
Get Help: (385) 206-5812Furnace Repair FAQ
The Benefits of Professional Furnace Repair
A furnace combines gas, flame, high voltage, and a flue in one cabinet, and the failure that matters most is the one you cannot see from outside: a compromised heat exchanger passing combustion gases into the air your blower pushes through the house. Delayed ignition that booms at light-off stresses that exchanger further every morning it goes unfixed. Meanwhile the diagnostic traps stack up: a furnace that trips its high limit may have a bad switch, or it may be protecting itself from a clogged filter or a dying blower, and replacing the switch in the second case just removes a safety while leaving the fault.
Our experienced technicians look at every symptom in the context of the whole furnace. We measure flame signal instead of assuming it, which keeps us from replacing a healthy sensor while a cracked igniter or weak gas valve goes unnoticed. Draft is confirmed at the pressure switch and at the flue. Temperature rise is checked against the data plate, catching airflow problems before they shorten the life of the heat exchanger. The gas side is leak-tested with instruments, never with a quick sniff. The result is a furnace proven safe over a full cycle, plus an honest opinion if the unit is getting close to the point where replacing it beats repairing it again.
What to Expect From Our Furnace Repair
We follow a proven process to ensure every repair and installation is completed to the highest standards. Here's how we handle furnace repair from start to finish:
Sequence Diagnosis
We watch the furnace's startup sequence and measure at every stage: inducer draft, pressure switch, igniter resistance, flame signal, and gas valve operation, to find exactly where it breaks.
Combustion Safety Check
The heat exchanger is inspected, gas connections are leak-tested, and flue draft verified on every visit. A furnace repair that is not proven safe is not finished.
Same-Visit Repair
We fix the confirmed fault, and since igniters, flame sensors, pressure switches, capacitors, and motors are on the truck, most furnaces are heating again the same visit.
Final Cycle Testing
Before we leave, the furnace runs full cycles while we check temperature rise against the data plate, listen for clean, quiet ignition, and test each limit and safety control.
Want a Professional Opinion?
Our experienced technicians can assess your situation and recommend the best solution.
Call (385) 206-5812 NowMaintenance Tips for Furnace Repair
A few simple habits now, like regular filter changes and seasonal tune-ups, can add years to your system's life. Here are our expert recommendations:
- On high-efficiency models, keep the condensate trap and drain line clear and draining
- Give the furnace room to breathe, since a crowded utility space starves the burners of air
- Store laundry supplies, especially chlorine products, well away from the furnace closet
- Listen at light-off; clean ignition is quiet, and booming means the burners need service
- Have the furnace checked every autumn, while a weak igniter or fouled sensor is still an easy fix
- Keep a working carbon monoxide alarm on every level of the home and check it each month
- Change the filter monthly during heating season; it is the cheapest furnace part you will ever buy
Should You DIY or Call a Pro?
While some minor tasks like changing filters or checking a thermostat can be handled by homeowners, most HVAC work involves refrigerant, gas combustion, and high-voltage electricity, jobs that call for professional expertise. Here's a comparison:
| Factor | DIY Attempt | Professional Service |
|---|---|---|
| Heat Exchanger | Damage hidden inside the cabinet | Examined as standard on each call |
| Ignition Problems | New igniter installed on a hunch | Each ignition component tested |
| Gas Connections | Connections judged by smell | Instrument leak test on each visit |
| Limit Trips | A safety device jumpered out | Root cause of overheating corrected |
| Airflow Match | Airflow assumed, not measured | Blower tuned to the rated rise |
| Final Check | It lit once, call it fixed | Clean, safe operation verified over full cycles |
Get Furnace Repair Help Today
Every day you wait puts more strain on a struggling unit. Get Lehi HVAC on the job today.
Get Help: (385) 206-5812Furnace Repair Near Lehi
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