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 Clovis, CA, the failures cluster at predictable points: an oxide-coated flame sensor, 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.
Clovis HVAC repairs furnaces by testing the sequence, not guessing at it. Our experienced technicians watch the startup step by step and measure at each stage: igniter resistance, flame signal in microamps, pressure switch operation against actual inducer draft, gas valve voltage, and blower and capacitor health. Every visit includes the safety fundamentals on a fuel-burning appliance: the heat exchanger inspected, connections leak-tested, and draft confirmed, because the difference between a furnace problem and a furnace hazard is not visible from the thermostat. We measure temperature rise against the data plate before we leave so the fire and the airflow are matched the way the manufacturer intended.
Clovis HVAC services natural gas, propane, and electric furnaces of every major brand, from standard 80 percent units to condensing high-efficiency models with their traps, drain lines, and dual pressure switches. Our trucks carry the parts that actually fail, such as igniters, flame sensors, pressure switches, capacitors, inducer assemblies, and blower motors, so most homes have heat again before we leave. Call (559) 337-5477 for furnace repair anywhere in Clovis, and we can have someone out today.
Cooling trouble instead? See AC Repair in Clovis.
How Much Does Furnace Repair Cost in Clovis?
Most furnace repairs in Clovis cost 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 replacementBurners light but cut out almost immediately | $80–$250 | Burners light but cut out almost immediately |
| 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 motorStartup fan fails, furnace won't fire | $400–$1,000 | Startup fan fails, furnace won't fire |
| Blower motorBurners run but little or no air comes out of the vents | $400–$1,500 | No airflow, or the blower runs nonstop |
| Control boardErratic behavior, error codes, or no response at all | $300–$700 | Erratic behavior, error codes, or no response at all |
| Gas valve replacementIgniter glows but gas never flows to the burners | $250–$700 | Igniter glows but gas never flows to the burners |
Typical ranges for common repairs. Your exact price is quoted after diagnosis.
Factors That Change the Price
- The age and efficiency of the furnace, since high-efficiency models use more specialized parts
- Whether a cracked heat exchanger is found, which usually means replacement rather than repair
- Same-day or after-hours service versus a planned visit
- How easy the furnace is to reach
When a repair gets expensive on an aging furnace, you'll see both options before deciding. Call (559) 337-5477 to get your price.
Signs You Need Furnace Repair in Clovis
Recognizing the warning signs early can save you time, money, and prevent significant damage to your property. These are the signals our technicians see most often when a problem is underway:
- Squeals, scrapes, or grinding noises behind the blower door
- Frequent on-off cycling that never reaches the thermostat setting
- A bang or boom when the burners ignite late
- The igniter glows and clicks, yet no flame ever appears
- Water, rust stains, or black soot around the flue or cabinet
- Burners light, run a few seconds, then shut down repeatedly
- The blower runs constantly but the air never warms
- A flame that burns soft and yellow rather than steady blue
Early Action Saves Money
Most HVAC failures start small, a weak capacitor, a squealing blower, a system that runs a little longer each week. Don't wait, get Clovis HVAC on the phone at (559) 337-5477 and we'll take a look right away.
Furnace Repair FAQ
Why Professional Furnace Repair Matters
Gas, open flame, high voltage, and a flue all share one cabinet in a furnace, and the most dangerous failure is the one you cannot see: a damaged heat exchanger that lets combustion gases into the air the blower sends through your home. Every morning that delayed ignition keeps booming at startup, that exchanger takes more stress. The diagnostic side has its own pitfalls. When a furnace trips its high limit, the switch itself may be bad, or the furnace may be protecting itself from a clogged filter or a failing blower. Replacing the switch when the real issue is airflow removes a safety device and leaves the actual problem in place.
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, so airflow issues are caught before they cut years off 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 work through a clear, repeatable process so nothing gets overlooked on your property. 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
On every visit, we inspect the heat exchanger, leak-test the gas connections, and confirm the flue is drafting. No furnace repair is complete until the unit is proven safe.
Expert Repair
Igniters, flame sensors, pressure switches, capacitors, and motors ride on the truck, so most furnaces are lit and heating again before we pack up.
Full Verification
We run complete cycles, measure temperature rise against the data plate, confirm clean ignition without booming, and verify every limit and safety control before we leave.
Maintenance Tips for Furnace Repair
Taking preventive measures can help you avoid costly heating and cooling problems down the road. Start with these practical measures our team relies on:
- Keep a working carbon monoxide alarm on every level of the home and check it each month
- Schedule service each fall to catch worn igniters and dirty sensors before cold weather arrives
- Change the filter monthly during heating season; it is the cheapest furnace part you will ever buy
- Pay attention when the burners light, since a boom instead of a soft whoosh calls for service
- Keep the condensate trap and drain clear on high-efficiency units to prevent lockouts
- Avoid packing the utility room, because burners need open space for combustion air
- Keep storage, lint, and especially chlorine-based products away from the furnace closet
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. Consider the following comparison:
| Factor | DIY Attempt | Professional Service |
|---|---|---|
| Heat Exchanger | No way to see a crack from outside | Examined as standard on each call |
| Ignition Problems | New igniter installed on a hunch | Each ignition component tested |
| Gas Safety | Connections judged by smell | Connections leak-tested with instruments |
| Limit Trips | A safety device jumpered out | The airflow fault behind the trip found |
| Airflow Match | Fan speed never checked | Temperature rise set to the data plate |
| Final Check | One good start and done | Full cycles proven clean and safe |
Talk to a Furnace Repair Expert
Every day you wait puts more strain on a struggling unit. Get Clovis HVAC on the job today.
Get Help: (559) 337-5477Furnace Repair Across the Clovis Area
Our technicians handle furnace repair throughout Clovis and the surrounding communities, with the same upfront pricing everywhere we work.