The landlord’s carbon-monoxide alarm duty
Yes, in most California rentals. Landlords must provide working carbon monoxide alarms in homes that have a fuel-burning appliance, a fireplace, or an attached garage — the sources that can produce this deadly gas.
Under California law (Health and Safety Code Section 17926), carbon monoxide alarms are required in these units, generally placed outside sleeping areas and on each level of the home. Carbon monoxide is called a "silent killer" because it has no color or smell, so an alarm is often the only way to detect it before it causes harm.
Like smoke alarms, tenants are usually expected to test the alarm and report problems, while the landlord must install and maintain the required units and fix or replace one that fails.
If your rental has a gas appliance, furnace, fireplace, or attached garage but no working carbon monoxide alarm, that is a serious safety gap. A free, confidential review can explain your rights and what to ask your landlord to do.
This is general information about California tenant rights, not legal advice. Every situation is different.