Every time your thermostat calls for heat, the furnace works through a fixed checklist. The inducer motor starts and proves draft by closing a pressure switch, the hot surface igniter heats up, the gas valve opens, the burners light, and the flame sensor confirms there is fire. Only after all of that does the blower begin sending warm air into the house. Finding the step that fails is most of the job. Around Tigard, OR, the usual failure points are a flame sensor fouled with oxide, an igniter cracked by years of heating and cooling, a pressure switch that stays open because of a weak inducer or a clogged condensate trap on a high-efficiency unit, and control boards with burned relays. Any one of them halts the startup, and from the hallway they all look alike.
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 work together the way the manufacturer designed them to.
Tigard HVAC services natural gas, propane, and electric furnaces from all major brands, 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 a typical no-heat call ends with the house warming up. Call (971) 535-9452 for furnace repair anywhere in Tigard, and an experienced technician will be on the way today.
Cooling trouble instead? See AC Repair in Tigard.
How Much Does Furnace Repair Cost in Tigard?
For most Tigard homes, a furnace repair runs $150 to $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 | 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 Moves the Cost Up or Down
- 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
- Access to the furnace in attics, closets, or crawlspaces
If your furnace is past 15 to 20 years old or the repair is a major one, we'll give you repair and replacement prices side by side. Call (971) 535-9452 to get your price.
Signs You Need Furnace Repair in Tigard
Catching these issues early helps you avoid costly problems and protect your property. Watch for these telltale signs that professional help is needed:
- Flames that start, last a few seconds, and go out again and again
- Clicking and a glowing igniter with no burner flame
- A pilot or burner flame that is lazy yellow instead of crisp blue
- A furnace that shuts off every few minutes before the house warms up
- Air moving through the vents that never gets warm
- Rust streaks, soot, or water around the cabinet or flue
- Loud booms at startup caused by delayed ignition
- Grinding or high-pitched squeals from the blower
Act Before It Gets Worse
What seems like a minor issue today can take out a compressor or heat exchanger tomorrow. If you notice any of these signs, contact Tigard HVAC at (971) 535-9452 for a prompt inspection.
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Why Hire a Professional for 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.
At Tigard HVAC, no symptom gets treated in isolation. A meter tells us the flame signal, so we never condemn a good sensor while the real culprit, a cracked igniter or a weak gas valve, keeps causing trouble. We confirm draft at both the pressure switch and the flue, measure temperature rise against the data plate to catch airflow problems early, and test the gas side with a leak detector, not a guess. When we are done, the furnace has proven itself safe and correct through a full cycle, and if it is nearing the end of its useful life, we tell you honestly.
What to Expect From Our Furnace Repair
Our systematic workflow delivers thorough, lasting results on every job. Here's what you can expect when you choose Tigard HVAC:
Sequence Diagnosis
We run the furnace through its startup while we measure inducer draft, pressure switch response, igniter resistance, flame signal, and gas valve operation. The goal is to pinpoint the exact step that fails.
Safety Verification
Every repair includes a safety check: heat exchanger inspection, instrument leak testing on the gas side, and flue draft verification, because a furnace that runs is not the same as a furnace that runs safely.
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
We finish with a full-cycle test: temperature rise matched to the data plate, smooth ignition with no booming, and every limit switch and safety control confirmed working.
How to Prevent Furnace Repair Problems
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:
- If you have a high-efficiency furnace, check that the condensate drain is flowing freely
- Pay attention when the burners light, since a boom instead of a soft whoosh calls for service
- Keep storage, lint, and especially chlorine-based products away from the furnace closet
- Replace the filter every month while the furnace is working hard, since it costs less than any other part
- Test your CO detectors monthly and make sure each floor has one
- Book a fall tune-up so weak igniters and fouled sensors are caught before the first freeze
- Give the furnace room to breathe, since a crowded utility space starves the burners of air
Should You DIY or Call a Pro?
Some simple checks are suitable for DIY, but most heating and cooling repairs benefit from professional tools, training, and experience. Consider the following comparison:
| Factor | DIY Attempt | Professional Service |
|---|---|---|
| Exchanger Cracks | Cracks invisible from the outside | Inspected on every repair visit |
| Ignition Faults | Guesswork based on blink codes | Igniter, sensor, and valve each metered |
| Gas Connections | A loose union goes unnoticed | Connections leak-tested with instruments |
| Limit Trips | Limit replaced, cause left behind | The airflow fault behind the trip found |
| Blower Setup | Fan speed never checked | Temperature rise set to the data plate |
| Verification | It lit once, call it fixed | Clean, safe operation verified over full cycles |
Talk to a Furnace Repair Expert
Don't let a failing system get worse. Call Tigard HVAC now for prompt, professional service.
Call (971) 535-9452 TodayFurnace Repair Across the Tigard Area
Our technicians handle furnace repair throughout Tigard and the surrounding communities, with the same upfront pricing everywhere we work.