An alarm that sounds only now and then is the easiest maintenance item in a house to skip, and it matters most once a hired aide starts coming in. This guide walks through the install and service sequence for smoke and carbon monoxide alarms in a St. Louis area home, from the first mount to the replacement date, with one named owner for each step. It is written for families in St. Charles County and west St. Louis County who are setting up in-home help, and it applies just as well when a family member is the only caregiver.

Local option: New Plan Care gives families in the St. Louis area in-home help so a parent can stay home: companionship, help with bathing and dressing, meals, and overnight care. Call (314) 405-0887.

Step one: count the alarms and map them

Walk every level of the home and list each alarm by room, level, and type. Most homes need a unit in the hallway outside each sleeping area, a unit on every level including finished basements, and a carbon monoxide unit where fuel-burning equipment or an attached garage is present. Write the room, the level, and whether each unit is smoke, carbon monoxide, or combined. A map written this way is the list an aide can check against on a visit, and it shows gaps before anyone has to find them during an alarm.

Step two: mount and test each unit

Follow the manufacturer's mounting instructions for each unit, since placement rules, mounting height, and distance from kitchens and bathrooms differ by model. Press the test button after mounting, then confirm the sound can be heard from the bedroom with the door closed. Write the install date in pen on the back of each unit, not only in memory, so the next person can read it.

Step three: name who owns each task

Put one name beside each task: the monthly test, the battery change, the replacement date, and the response to a chirp. The family usually owns the install, the replacement, and the decision about whether a unit is faulty. Ask the agency in writing whether an aide will press the test button during a visit, whether an aide will log a unit that is chirping, and whether an aide will change a battery or only report it. If the agency says the aide does none of these, the family keeps those tasks and the schedule shows it. Do not assume an aide will fix or replace a unit unless the signed agreement says so.

Step four: put the checks on the visit log

Add a short alarm line to the visit log the aide reads and writes in: which units were tested, what the sound was, and the date of the last battery change. The value of the entry is that it is written before the next person arrives. It should record what was done, not what was assumed. If a unit chirps, the entry should give the room, the time heard, and who was called.

Step five: plan the replacement, not only the battery

Read the date printed on the back of each unit and write the replacement date on the family calendar. Alarm units have a service life set by the maker, and that printed date is the reference point. When it arrives, replace the whole unit rather than only the battery. Keep each unit's model and install date on the same page of the log so the next person can see what is in each room.

Questions to ask the agency before the first visit

Ask these in writing, not only on the phone. Will the aide press the test button during a visit? Will the aide report a chirping unit, and to whom? What does the agency's policy say about an alarm that sounds while no one is home? Who is called first in an emergency at night? Which alarm tasks does the agreement exclude? Compare the answers across agencies on the same questions, and keep the written replies with the care plan.

Where the local supply changes the schedule

In a county with fewer agencies, the list of firms that cover a given address is shorter, so confirm that an agency covers the specific address before assuming it does. If the home sits in a thinner market, write the alarm schedule into the agreement so a change in staff does not drop it. The guide Finding help where the supply is thinnest explains how to read supply when the choice of agencies is narrow.