Furnace carbon monoxide testing Ashland OH is the fastest way to know whether your heating system is leaking odorless CO into your living space. We test heat exchangers, flue draft, and burner combustion with a calibrated combustion analyzer, then hand you a written reading. If you smell exhaust, feel headaches near the furnace, or your CO alarm chirped last winter, call us today.
Furnace carbon monoxide testing Ashland OH is a safety inspection that measures the CO concentration in your flue gases and the air around your furnace, then verifies the heat exchanger, inducer motor, and pressure switch are doing their jobs. We insert a combustion analyzer probe into the flue, run the burner through a full cycle, and compare readings against NFPA 54 (National Fuel Gas Code) limits. Any reading above 100 ppm in the flue or 9 ppm in the room air gets flagged immediately.
Ashland winters push furnaces hard from November through March, and older units in Historic Ashland and South Ashland run longer cycles than they were designed for. That extra runtime stresses the heat exchanger and can open hairline cracks you cannot see. A furnace CO leak test Ashland homeowners schedule each fall catches those cracks before they spread. If you have been searching carbon monoxide testing near me Ashland Ohio, we can usually be at your door the same day.
Every CO test visit covers the full safety picture, not just a single flue reading. Here is what is included in the standard fee, and what we quote separately if your furnace needs parts or repairs.
We measure CO in parts per million, oxygen percentage, and flue temperature at steady state and during ignition. Readings are compared against NFPA 54 limits and recorded on your written report.
We take room-air CO readings at three heights near the furnace and one at the nearest supply register. Any reading above 9 ppm means CO is escaping into your living space and needs immediate attention.
We use an inspection camera to check the heat exchanger for cracks, rust streaks, and soot patterns. This is where most CO leaks start, and it is the step a basic alarm cannot replace.
We test flue draft with a manometer and verify the inducer motor and pressure switch are working. Weak draft is a common cause of CO backup, especially on older furnaces in Ashland.
You get a signed report with date, technician name, all readings, and pass or fail status. Landlords use it for tenant turnover records, and homeowners keep it for insurance and resale paperwork.
We inspect the furnace filter and burner assembly during every visit. A clogged filter or dirty burner affects combustion, so we note the condition and quote replacement only if it is needed.
We start by asking when the furnace was last serviced and whether anyone in the home has had headaches, nausea, or unusual fatigue. Then we check your existing CO alarms and confirm they are within their replacement date. This takes about five minutes and tells us whether we are dealing with a chronic issue or an acute event.
We pull the burner compartment cover and inspect the heat exchanger with an inspection camera, looking for cracks, rust streaks, and soot patterns. We check the inducer motor for proper draft, verify the pressure switch is closing, and look at the flame sensor and igniter for carbon buildup. This step runs 15 to 20 minutes on most units.
We drill a small test port in the flue pipe, insert a calibrated combustion analyzer, and let the furnace run a full heating cycle. The analyzer measures CO in parts per million, oxygen percentage, and flue temperature. We record steady-state readings and note any spike that occurs during ignition or blower startup.
We take room-air CO readings at three heights near the furnace, plus one reading at the closest supply register. Ambient CO above 9 ppm means the heat exchanger or flue is leaking into the living space. This step takes about 10 minutes and is the one that catches problems a flue-only test would miss.
You get a written report with every reading, the pass or fail status, and a plain-English explanation of what we found. If the furnace passes, we seal the test port and you are done. If it fails, we tag the unit, walk you through repair options, and give you a written estimate before any work begins.
Purpose-built equipment, used by trained technicians — so the job is done accurately the first time.
Measures flue CO in parts per million, oxygen percentage, and flue temperature. This is the primary instrument for every CO test we run and the source of the numbers on your report.
Measures flue draft and gas valve pressure. We use it to confirm the inducer motor is pulling correctly and that the gas valve is not over-firing the burner.
Lets us see inside the heat exchanger without disassembling the furnace. We use it to find cracks, rust streaks, and soot patterns that are invisible from the outside.
Tests control board voltage, blower motor amp draw, and capacitor function. Electrical faults often cause the short cycling that raises CO output.
Confirms power is present at the right points in the wire harness before we touch the control board. Safety step on every electrical diagnosis.
Cleans flame sensors and burner ports. A dirty sensor is one of the most common causes of short cycling and elevated CO in Ashland furnaces.
Checks gas supply pressure at the valve inlet and outlet. Correct pressure is required for clean combustion and safe CO levels.
A homeowner called after their CO alarm sounded twice in one week. Their 2003 Carrier furnace was running but the flue CO reading came back at 220 ppm, and the inspection camera showed a 3-inch crack in the heat exchanger. The family had been getting evening headaches for a month.
We shut the furnace down immediately and quoted a heat exchanger replacement. The new exchanger went in two days later, and post-repair testing showed flue CO at 28 ppm and ambient CO at 0 ppm. The headaches stopped within a week.
A rental property near the river had a furnace that kept locking out. The tenant reported a metallic smell but no alarm event. Our initial test showed flue CO spiking to 160 ppm during ignition, and the flue termination was packed with a bird nest and rust flakes.
We cleared the flue, replaced a rusted section of pipe, and re-ran combustion analysis. Flue CO dropped to 32 ppm and the lockouts stopped. The landlord got a written report for the tenant file.
A homeowner complained the furnace was short cycling every few minutes and the house never felt warm. Testing showed CO at 95 ppm with spikes to 140 ppm during each ignition. The flame sensor was coated in carbon and the burner ports were partially blocked.
We cleaned the flame sensor and burner assembly, then adjusted the air-fuel mixture. Post-repair readings showed steady flue CO at 30 ppm and the furnace ran full 15-minute cycles instead of 3-minute bursts.
Carbon monoxide problems rarely announce themselves. These are the four issues we find most often when we run furnace carbon monoxide testing Ashland OH homeowners schedule, and what happens if they are left alone.
Ask a pro →We confirm the crack with an inspection camera and combustion readings, then walk you through repair versus replacement. If the crack is small and the furnace is otherwise sound, we can weld or replace the affected section. If the exchanger is compromised, we quote a full replacement.
We test draft with a manometer, confirm the inducer motor is pulling the correct pressure, and replace the motor if it has failed. After the repair we re-run combustion analysis to confirm flue CO is back in the safe range.
We clean the flame sensor with a wire brush and steel wool, or replace it if the signal is weak. Then we run a full heating cycle and confirm steady flame and normal CO readings before we leave.
We inspect the flue from the furnace to the termination cap, clear blockages, and verify draft with a manometer. If the flue pipe is rusted through, we replace the affected section and re-test combustion.
“Our CO alarm went off on a Sunday night and we had no idea what to do. Ashland Furnace Repair Pros had a tech at our house in under two hours. He found a cracked heat exchanger, showed us the readings on his analyzer, and shut the furnace down. We had a new furnace by Wednesday. I still have the written report in our files.”
Dana R.Homeowner, Historic Ashland
✓ Verified“I own three rentals near Ashland University and I need CO testing paperwork between every tenant. They test all three units the same morning, hand me a written report with actual ppm numbers, and invoice me once. Been using them for two years and never had a tenant complaint or an insurance question.”
Marcus T.Landlord, South Ashland
✓ Verified“I kept getting headaches in the evening and could not figure out why. They tested our 18-year-old Carrier furnace and found the flue CO was running at 180 ppm. The tech cleaned the burners, adjusted the air mixture, and got it down to 35 ppm. Headaches stopped within a week. Worth every penny.”
Karen L.Homeowner, Riverfront District
✓ VerifiedMost residential CO tests in Ashland run $150 to $275 in 2026, and the visit takes 45 to 75 minutes. That price covers the combustion analysis, ambient air readings, and a written report. If we find a problem and you approve a repair, we credit the testing fee toward the repair cost. Emergency after-hours calls carry a higher dispatch rate.
The clearest signs are headaches, dizziness, and nausea that fade when you leave the house, plus a CO alarm that sounds or chirps. You may also see soot streaks on the furnace cover, a yellow or orange burner flame instead of blue, or excessive moisture on cold windows near the furnace. Any of these means shut the furnace down and call us.
Test every fall before the first cold snap, and again any time you smell exhaust or your alarm goes off. Ashland furnaces run long cycles from November through March, so annual testing catches heat exchanger cracks before they widen. Landlords should test between every tenant turnover, and any furnace over 15 years old benefits from twice-a-year checks.
Yes. We hold same-day slots for CO testing in Ashland Ohio, and we can often reach Downtown Ashland, Ashland Heights, and Riverfront District addresses within a few hours of your call. If your alarm is actively sounding, we treat it as an emergency and dispatch the nearest technician immediately, day or night.
Emergency Furnace RepairWhen CO testing reveals a cracked heat exchanger or failed inducer motor, we handle the emergency repair on the spot. Our trucks carry common parts for Carrier, Trane, and Lennox units so most repairs finish the same visit.Explore →
24/7 Furnace RepairCO alarms do not wait for business hours. Our 24/7 line connects you to a live dispatcher who can send a technician to your Ashland home at any hour, and we bring a combustion analyzer to re-test after the repair.Explore →
Same-Day Furnace RepairIf testing shows a failed flame sensor, dirty igniter, or stuck pressure switch, we can usually complete the repair the same day. You get one visit for diagnosis and a second for the fix only if a part needs ordering.Explore →
Furnace Not Heating RepairA furnace that will not heat is sometimes a safety lockout caused by CO or a tripped limit switch. We test for CO first, then trace the no-heat fault through the control board, gas valve, and thermostat.Explore →
Furnace Blowing Cold Air RepairCold air from the vents can mean the blower is running without a flame, which sometimes points to a CO-related lockout. We test combustion, verify the gas valve, and check the blower motor before recommending a fix.Explore →
Furnace Ignition RepairIgnition failures often leave unburned gas in the chamber, which raises CO risk. We test the igniter, flame sensor, and gas valve, then re-run combustion analysis after the repair to confirm safe operation.Explore →
Furnace Pilot Light RepairA pilot that will not stay lit can release raw gas and CO into the burner compartment. We test the thermocouple and thermopile, replace failed parts, and verify flue CO readings before we leave.Explore →
Furnace Thermocouple ReplacementA worn thermocouple is a common reason standing-pilot furnaces shut down and produce incomplete combustion. We replace it with a White-Rodgers or Honeywell unit, then re-test CO to confirm the flame is burning clean.Explore →One test tells you whether your furnace is safe. We are NATE-certified, Ohio-licensed, and we bring a calibrated combustion analyzer to every job. Call now and we will get you on the schedule, often the same day.
Schedule CO Test +14195820227 →Call +14195820227 any time, day or night, and a live dispatcher will take your address and symptoms. We serve Ashland and Ashland County with same-day and emergency service. You can also email [email protected] and we will reply within one business hour.