Signs of Carbon Monoxide in Your Home: A Homeowner's Guide
Carbon monoxide is a colorless, odorless gas that can poison or kill without warning. The key symptoms of CO exposure are headache, dizziness, weakness, nausea, and confusion — often mistaken for the flu. If you or household members experience these symptoms at home and feel better when outside, evacuate immediately and call 911. Covington Heat & Air can inspect your HVAC system after emergency clearance — call (405) 568-9463.
Why Carbon Monoxide Is Called the Silent Killer
Unlike gas leaks (which are given an odor additive) or smoke (which is visible), carbon monoxide gives no sensory warning. It accumulates silently. The only reliable detection methods are working CO detectors and awareness of physiological symptoms.
CO is produced by incomplete combustion of fuel — natural gas, propane, oil, and wood. Any fuel-burning appliance in your Yukon home can be a CO source if it malfunctions: furnaces, water heaters, gas ranges, fireplaces, and generators.
Symptoms of Carbon Monoxide Exposure
The key pattern: symptoms appear at home, improve when you go outside, and return when you’re back inside. This pattern is a strong indicator of CO exposure rather than illness.
- Headache — often the first and most consistent symptom, even at low CO levels
- Dizziness or lightheadedness — may come on gradually
- Nausea or vomiting — frequently mistaken for a stomach bug
- Weakness or fatigue — unusual tiredness, especially in the morning
- Confusion or disorientation — cognitive symptoms appear at higher concentrations
- Shortness of breath — at higher levels, may accompany chest pain
- Pets behaving strangely or becoming lethargic — animals often show symptoms before humans
Your CO Detector Checklist
- Install CO detectors on every level of your home — minimum one per floor
- Place detectors near sleeping areas so they wake you if CO accumulates at night
- Test detectors monthly — press the test button
- Replace batteries every six months (use daylight saving time as your reminder)
- Replace the entire detector unit every 5-7 years — the sensor degrades over time
- Know where your detectors are and make sure every household member does too
What to Do If a CO Detector Alarms
- Evacuate everyone — humans and pets — immediately
- Do not stop to grab belongings or investigate the source
- Leave doors open as you exit to help ventilate
- Call 911 from outside — do not re-enter
- Do not re-enter until emergency personnel declare it safe
- After clearance: call Covington Heat & Air at (405) 568-9463 for a licensed HVAC inspection before using any fuel-burning appliance
How Your HVAC System Can Create a CO Risk
The most common HVAC-related CO source is a cracked heat exchanger in a gas furnace. The heat exchanger is the barrier between combustion gases (including CO) and the air circulated through your home. When it cracks — which happens as the metal expands and contracts over thousands of heating cycles — combustion products can leak into your living space.
This is why annual furnace inspections before the heating season are critical for Yukon homeowners. Covington Heat & Air checks heat exchanger integrity as part of every heating tune-up.
Your Next Steps
- Install CO detectors if you haven’t already
- Schedule a furnace inspection with Covington Heat & Air before winter — call (405) 568-9463
- Review your HVAC maintenance history — if it’s been more than 12 months, schedule a tune-up now
Henry and the Covington Heat & Air team serve Yukon and the full OKC metro. CO safety inspections and annual HVAC tune-ups available now — call (405) 568-9463 or visit covingtonheatair.com/contact-us/.
Frequently Asked Questions
What causes carbon monoxide leaks in a home?
CO leaks most commonly come from malfunctioning fuel-burning appliances — cracked furnace heat exchangers, blocked flue vents, poorly maintained gas water heaters or ranges, and indoor generator use. HVAC-related CO issues are most common when heating systems haven’t had annual inspections.
How can I detect carbon monoxide in my home?
Install CO detectors on every floor and near sleeping areas. Also be alert to the physiological pattern: symptoms that appear at home and resolve when you go outside. CO has no smell, color, or taste — detectors are the only reliable prevention tool.
Is carbon monoxide poisoning common?
More common than most people realize. The CDC estimates over 400 Americans die from CO poisoning annually from non-fire sources, and thousands more are hospitalized. Oklahoma’s cold winters mean heating systems run frequently, increasing the risk during months when furnaces are in heavy use.
What should I do if a CO alarm goes off?
Evacuate immediately — do not investigate the source or gather belongings. Call 911 from outside. Do not re-enter until emergency responders declare the area safe. Then call Covington Heat & Air at (405) 568-9463 for a licensed inspection of your HVAC system.
How often should I check my CO detectors?
Test detectors monthly by pressing the test button. Replace batteries every six months. Replace the entire detector every 5-7 years — the electrochemical sensor inside degrades over time even if the alarm still sounds during testing.
Can my AC system produce carbon monoxide?
Central AC systems (heat pumps and standard air conditioners) do not produce CO on their own — they’re not combustion-based. However, a gas furnace connected to the same air handler can distribute CO through the ductwork. This is the most common HVAC-related CO scenario in Yukon homes.
Is CO risk higher in Yukon than in other areas?
Risk levels vary by home age, appliance condition, and maintenance history — not specifically by city. However, Oklahoma’s cold winters mean furnaces in the Yukon area run for extended periods, giving any pre-existing crack in a heat exchanger more opportunities to expose household members.