01
Combustion analysis
Full combustion, draft, gas pressure, and flue check on your gas furnace. We don’t sign off until the numbers are right.
Carbon monoxide testing in Las Cruces, before the heat goes on.
Carbon monoxide has no color and no smell. A gas furnace with a cracked heat exchanger, a blocked flue, or a bad gas connection can put it into your home without warning. We test for it on every furnace call, and we come immediately if your CO alarm goes off.
When to get a CO test
Don’t wait for the alarm to be the first warning.
Your CO alarm went off or keeps chirping
If anyone feels sick, get everyone outside and call 911 first. Otherwise stop running the furnace, ventilate the home, and call us. We come immediately.
Headaches or nausea that ease when you leave
Headaches, dizziness, nausea, and confusion are early carbon monoxide symptoms. If they fade once you are outside, get the furnace checked.
Yellow or flickering burner flame
A healthy gas flame burns blue. A yellow, lazy flame can mean poor combustion.
Soot around the furnace or vents
Soot buildup and unusual odors are common signs of a cracked heat exchanger or a venting problem.
First cold night, or no tune-up this year
A gas furnace should get a safety inspection once a year, ideally before the heating season begins.
What a CO test covers
Every carbon monoxide test.
02
Heat exchanger inspection
A cracked heat exchanger is the classic source of furnace carbon monoxide. We look for cracks, soot, and flame changes.
03
Flue and venting check
Blocked vents and backdrafting push combustion gases back into the home instead of outside.
04
Gas line check
Gas connections and pressure checked along with the rest of the safety inspection.
05
CO alarm placement advice
Outside sleeping areas, on every level, near the furnace but not right next to it, and away from bathrooms, kitchens, and supply vents.
06
Answers on the spot
If we see something dangerous, we tell you on the spot, with a fixed-price written quote for any repair.
How a CO test goes
From first call to verified safe heat.
1
You call. A real person answers.
Tell us what’s happening. If an alarm is sounding, we come immediately, day or night.
2
We arrive in the truck.
1 to 2 hour response target inside Las Cruces.
3
Test and inspect.
Combustion analysis, heat exchanger, flue, and gas line checked on your furnace.
4
Plain-language results.
What we found, what it means, and a written quote before any repair begins.
Frequently asked
Carbon monoxide questions, answered.
What should I do if my CO alarm goes off?
If anyone feels sick, get everyone outside and call 911. Otherwise, stop running the furnace, ventilate the home, and call us at (575) 636-2754. We come immediately. Never disable or ignore an active alarm.
What if I smell gas?
Leave the home right away, without switching lights or appliances on or off, and call New Mexico Gas Company at 888-664-2726 from outside. Once the gas company clears the home, call us at (575) 636-2754 to inspect and repair the furnace.
What are the symptoms of carbon monoxide poisoning?
Headaches, dizziness, nausea, and confusion come first. Longer exposure can lead to loss of consciousness and can become life-threatening. Because carbon monoxide is colorless and odorless, it builds up without warning.
Can a furnace leak carbon monoxide?
Yes. Cracked heat exchangers, blocked flues, and bad gas connections are the usual causes. That’s why we run a combustion analysis and CO check on every furnace visit.
How often should I have my furnace checked for carbon monoxide?
Once a year, ideally before the heating season, and again after a CO alarm, a suspected gas leak, or a furnace repair. Test your CO alarms monthly too.
Where should carbon monoxide alarms go?
Outside sleeping areas, on every level of the home, and near the furnace but not directly next to it. Keep them away from bathrooms, kitchens, and direct airflow vents. More in our gas furnace safety guide.
Is a CO check part of a furnace tune-up?
Yes. On gas equipment a tune-up is a safety check, not just a maintenance check. See our furnace repair and maintenance plans.
Heating calls
What homeowners said after the truck pulled away.
"Best service in town! Called for after-hours emergency repair and not only did they answer, but came out earlier than their ETA, quickly diagnosed the problem AND had all the needed parts on hand."
Josh Miranda · Google Review
"Angel was very professional and urgent to get the problem taken care of. My heater wasn’t working, and he sent someone out sooner than the scheduled time."
Isaiah Lee · Google Review
"Angel & the great guys at Air Control gave us the best price & did an excellent job installing our new furnace & refrigerated AC system."
Sonja Clark · Google Review