Smoke and CO Alarms in Rentals and the Tech's Part

Why this matters

A rental is the house where a dead alarm is most likely to stay dead. The occupant assumes the owner handles it, the owner assumes the occupant would have said something, and the property manager only hears about it when a work order mentions it. Your tech is often the only person with a trained eye who walks through that unit all year. If they see an empty ceiling bracket and say nothing, nobody else is going to, and if there is a fire that week the work order with your shop's name on it is the record that shows someone was inside.

This card is about what a tech of any trade does in a rental when an alarm is missing, dead, chirping or past its date. It is not about who is legally responsible for the alarm. That question has real answers, they differ by state and city, and they belong to the owner's attorney, not to your tech. This is not legal advice.

Who usually owns what, and why your tech should not settle it

Across most of the US, the broad pattern is that the owner or landlord has to provide working smoke alarms, and carbon monoxide alarms where state or local law requires them, and the occupant has some duty to test, keep batteries in, and report a unit that does not work. The split moves a lot between jurisdictions:

• State statute usually sets the base rule. California's law, for example, has the owner install and maintain alarms and requires the tenant to notify the owner when one is inoperable. Texas puts battery replacement during a tenancy on the tenant in many cases while keeping the install and repair duty on the landlord. Other states sit in between or say little.
• Local housing and fire codes often add to it: inspection at every turnover, a certificate filed with the city, sealed long-life batteries, or CO alarms in places the state rule does not reach.
• The lease may assign testing or battery duty to the occupant, but within whatever the statute allows.

The reason your tech stays out of this is practical, not just legal caution. A tech who tells a tenant "your landlord is required to replace that" has made a legal claim on behalf of your shop, possibly a wrong one, to someone who will repeat it to the owner, who is often your actual customer. A tech who tells the owner "that's the tenant's job" has done the same thing in the other direction. Neither statement fixes the alarm. Your shop's position is simpler and holds up everywhere: we saw it, we told both of you, here is the record.

The three rules for a tech in a rental

1. Never remove an alarm, even when asked. The most common request a tech hears is "can you just take that thing down, it won't stop chirping." In a rental that request comes from someone who does not own the device and may not have the authority to remove it. Taking it down leaves the unit with less protection than you found it, with your shop's van parked outside. If the alarm is chirping, the fix is a new battery where that is in scope and the unit is in date, or leaving it in place and reporting it. If it is in the way of your work, follow 'The Smoke and CO Alarm Disturb and Restore SOP' and put it back before you leave.

2. Report a dead, missing or expired alarm to both the occupant and the owner. Telling only the person in front of you is the failure. The occupant cannot replace a hardwired unit and may not be allowed to. The owner cannot act on something they were never told. You tell the occupant in person and the owner, or the property manager who booked the job, in writing the same day.

3. Record it on the work order. Location, what you saw, the manufacture date if you could read it without removing the unit from its bracket, who you told, and when. A verbal "I mentioned it to the tenant" is gone the moment the tech gets back in the van.

What counts as reportable

Your tech does not need to audit the house. They report what they see in the rooms they were in, plus anything obvious on the way through. These are the conditions worth a line on the work order:

Two judgment calls in that table. The tech does not decide whether CO alarms are legally required in that particular unit; they note that a fuel-burning appliance is there and they did not see one, and the owner decides. And reading a date code is fine when the alarm can be turned on its base and read without disconnecting it; pulling a hardwired unit down to read it is not the tech's job in a rental. See 'Reading the Manufacture Date and the Ten-Year Replacement Rule' for where the date lives.

The conversation, in two parts

The tech's words matter because the tenant and the owner hear different things in them. The pattern below is the one to train: state what you saw, state what you are doing about it, and say nothing about who is at fault.

TECH: Before I go - the alarm in the back bedroom
      is off the ceiling. It's on your dresser with
      the battery out.
TENANT: It kept going off when I cooked.
TECH: That happens. I'm not going to take it or
      throw it out. I'd put it back up tonight,
      and I'm letting the manager know today so
      they can look at a better spot or model.
TENANT: Am I in trouble?
TECH: Not from me. I just write down what I see.
      ...
TECH (to manager, same day): Unit B, back bedroom
      smoke alarm found off its base, battery out.
      Tenant says cooking alarms. Hall alarm is
      chirping, back reads 2013. Nothing repaired,
      it's on the work order with photos.
MANAGER: Can't you just swap them?
TECH: Office can quote it. I can't do it on this
      ticket without your OK on the work order.

Notice three things the tech did not do: tell the tenant they broke a law, tell the manager the tenant was at fault, or replace hardware outside the ticket. The quote offer is legitimate if your shop carries alarms and the tech is allowed to install the type involved. Hardwired units are line-voltage work and go to someone licensed for it where your state requires that.

Worked example: a water heater call in a duplex

A property manager books a plumber for a gas water heater that is not lighting in Unit B of a duplex. The tenant lets him in. This is the whole pass, carried through.

What the tech saw on the way to the utility closet, and after.

• Hallway outside the two bedrooms: smoke alarm on the ceiling, chirping roughly once a minute. He turns it on its base without disconnecting it; the label reads 2013. In October 2026 that is 13 years from manufacture, past the 10-year replacement age.
• Back bedroom: empty base on the ceiling; the alarm is on the dresser with the battery beside it.
• Front bedroom: alarm on the ceiling, light blinking normally, no chirp. He does not test it; testing an interconnected alarm sets off the whole unit and the tenant did not ask.
• No CO alarm anywhere he walked, in a unit with a gas water heater and, the tenant says, a gas range.

What he did not do. He did not take down the chirping hall unit, even though the tenant asked. He did not reinstall the bedroom alarm himself on this ticket, because it may have been removed for a reason (it sits close to the kitchen door) and a new location or model is the owner's call. He did not tell the tenant that CO alarms are required, because he does not know the local rule for this building.

What went on the work order. The water heater repair, then a separate block:

• "Life-safety observations, Unit B, no work performed:"
• "Hall smoke alarm chirping, date on label 2013."
• "Back bedroom smoke alarm off its base, battery removed, on dresser. Tenant reports cooking nuisance alarms."
• "Front bedroom alarm in place, not tested."
• "No CO alarm observed in hall, kitchen or utility closet. Gas water heater and gas range present."
• "Told tenant in person at departure that the back bedroom has no working alarm and the unit has no CO alarm, and asked tenant to put the bedroom alarm back on its base with its battery tonight. Called property manager at the number on the ticket and followed with a text of this note and three photos."

Count the observations: four lines describing four conditions, three of them deficiencies (the chirping expired unit, the removed unit, the absent CO coverage) and one recorded as fine. The office gets the same four lines, which is what lets them write a quote that matches what the tech actually saw.

Why the record carries the date code rather than "old alarm." "Old" invites an argument; "2013" ends one. It also tells the owner that a battery will not fix the hall unit, which matters because the easy response to "it's chirping" is a battery, and on a unit 13 years past its manufacture date that only resets the chirp clock on a sensor that is past its service life. See 'How to Find the Chirping Alarm and Tell What the Chirp Means'.

What changes the call

The occupant is the customer. When a tenant books your shop directly, the owner is not on the ticket. The tech still tells the tenant, still records it, and tells the tenant plainly that the owner needs to know. Whether your office contacts an owner it has no relationship with is a shop policy question; many shops give the tenant a copy of the note and leave it there.

The work disturbed the alarm. If your own dust or your own ladder is the reason an alarm is covered or off its base, that is not an observation, it is your shop's obligation. It goes back up and gets tested before you leave, under the disturb-and-restore SOP, whatever the lease says about who maintains it.

Someone is in danger right now. A CO alarm sounding, or a sleeping occupant you cannot rouse in a unit with a gas smell, is not a work order note. The tech gets everyone outside and calls 911 from outside. See 'How to Respond When a CO Alarm Sounds and You Are Not the Heating Tech'.

The building is multifamily with a central system. Apartments in larger buildings often have a fire alarm system with devices that look like home alarms. Those are not the tenant's or your tech's to touch at all; they belong to the building's fire alarm contractor. The tech reports what they see to building management and nothing else.

What goes wrong when this is skipped

The battery that went in the drawer. A tech removes a chirping unit "just for today" as a favor, and it never goes back. There is now an empty base in a rental with your shop's last visit on the record. See 'The Alarm Left in the Drawer'.

The verbal-only report. The tech tells the tenant, the tenant forgets, the owner never hears. When the property manager later asks whether anyone noticed, there is nothing to show. A spoken warning protects nobody once the tech has left.

The editorial. A note that reads "tenant tampered with alarm, landlord negligent on CO" assigns blame twice and states a legal conclusion. Write what you saw and who you told. The owner and their attorney can draw conclusions from facts; they cannot unsay your shop's opinion.

References

• California Health and Safety Code, smoke alarm provisions for dwelling units (owner install and maintain, tenant notify), as the example of a statute that splits duties.
• Texas Property Code, Chapter 92, Subchapter F, smoke alarms in residential tenancies, as the example of a statute that assigns battery replacement to the tenant in many cases.
• See related: Why Every Trade Owes the Life-Safety Devices in a House.
• See related: The Smoke and CO Alarm Disturb and Restore SOP.
• See related: The Life-Safety Deficiency Notice SOP.