Carbon Monoxide Detector Replacement & Installation
CO alarms age out just like smoke alarms. They just don’t get the same attention. We replace standalone CO units and combination smoke/CO alarms in the same visit, priced per unit before we arrive.
If a CO alarm is sounding continuously right now, that is an emergency. Get everyone to fresh air and call 911 first.
What to know about CO alarms
CO is a different threat
Carbon monoxide is invisible and odorless. You cannot smell what a CO alarm detects. It comes from fuel-burning appliances, fireplaces and attached garages, which is why we treat CO coverage as its own job.
Combo units do both jobs
Combination smoke/CO alarms cover both hazards from one spot on the ceiling: fewer units, one expiry date to track. Where your layout suits them, we’ll say so. Where it doesn’t, we won’t force it.
They expire too
Every CO alarm has an end of life, marked on the unit, and most announce it with a chirp or a spoken warning. If yours is chirping end-of-life, the sensor is done and replacement is the only fix.
Replacement and installation, one visit
We replace expired or failed CO units, add coverage where a home has none, and swap aging smoke alarms for combination units where that makes sense. NFPA and manufacturer guidance puts CO alarms on each level of the home and near sleeping areas. We place to that guidance, test every unit, and take the old ones away.
Standalone CO, combination smoke/CO, hardwired or sealed 10-year battery: the per-unit price includes labor, materials and tools, and you get it before we arrive. Hardwired combo units are electrician work, and that is who shows up. About hardwired replacement.
A sounding CO alarm is not a maintenance call.
A continuous CO alarm means get everyone outside to fresh air and call 911. Carbon monoxide is an emergency every time. What we handle is everything before and after that moment: end-of-life chirps, expired sensors, missing coverage, and replacement done right.
CO detector questions
How long do carbon monoxide detectors last?
Every CO alarm has an end-of-life date or signal set by its manufacturer, marked on the unit, and CO sensors generally age out sooner than people expect. If the unit is chirping end-of-life or the date has passed, it is done.
Should I get separate CO alarms or combination units?
Both work. Combination smoke/CO units cover two hazards from one spot and leave one expiry date to track; standalone units add CO coverage without touching working smoke alarms. We recommend based on your layout, not a catalog.
What do I do if my CO alarm goes off?
A continuous alarm is an emergency: get everyone to fresh air and call 911. A single chirp at intervals is the unit reporting a dead battery or end of life. That is the service call, and we handle it in one visit.
Do you install CO detectors where there were none?
Yes. Homes with fuel-burning appliances, fireplaces or attached garages need CO coverage on each level and near sleeping areas per NFPA and manufacturer guidance. We place, install and test to that standard.
Cover the hazard you can’t smell.
Count your CO and smoke units together. One visit covers both, priced per unit with labor, materials and tools included.