Selfmanaged

Gas smell, carbon monoxide or a power cut: what to do first

The words your tenant’s page gives for a smell of gas, a carbon monoxide alarm and a power cut, and what you do next.

Updated 24 October 2026

Checked against its sources on 11 October 2026

A smell of gas or a carbon monoxide alarm sounding: the first call is to the gas emergency number, not to you or a trade. For sparks, a burning smell or a power cut, your tenant’s page gives the steps to take first and the number to ring. This guide shows the page’s words exactly. Your part comes next: the repair, and a number your tenants can ring.

At the top of every tenant page, under Is anyone in danger now?, these numbers show, even before your tenant signs in.

Your tenant’s page says:

  • 999: Fire, police or ambulance, if anyone is in danger
  • 0800 111 999: Gas emergency: a smell of gas or carbon monoxide. Free, 24 hours
  • 105: Power cut. Free
  • NHS 111: Urgent medical advice

A smell of gas

When your tenant chooses A smell of gas, their page shows these steps at once.

Your tenant’s page says:

  • Call the National Gas Emergency Service now on 0800 111 999. It’s free and open 24 hours.
  • Don’t smoke or light matches. Don’t turn electrical switches on or off.
  • Open doors and windows. Turn the gas off at the meter’s handle, unless the meter is in a cellar.
  • If the smell is strong, get everyone out and wait outside.

If your tenant rings you instead, give them the same words in the same order: the emergency number first, then the steps.

Once the emergency call has been made, a repair to the home’s gas pipes or appliances is yours to arrange. Book a Gas Safe registered engineer, and check their number on the Gas Safe Register before they come.

In the app, a report that names a smell of gas or carbon monoxide counts as a heating and gas repair, whatever your tenant chose. So it goes only to a trade with a Gas Safe number.

A carbon monoxide alarm sounding

When your tenant says a carbon monoxide alarm is sounding, or they feel unwell and think it’s carbon monoxide, their page shows these steps at once.

Your tenant’s page says:

  • If your carbon monoxide alarm is sounding, or you think there’s carbon monoxide: stop using anything that burns gas, oil, coal or wood, and switch it off. Open doors and windows.
  • Get everyone out into fresh air and don’t go back in. Call 0800 111 999.
  • Get medical help straight away, even if you feel fine: call NHS 111, or 999 in an emergency.

Once everyone is safe, find out what set the alarm off before the appliance is used again. For anything that burns gas, that means a Gas Safe registered engineer.

If the alarm itself may be faulty, your tenant can report it on their page, and the app sorts that report as urgent.

Sparks, a burning smell or a power cut

When your tenant chooses Sparks, a burning smell or bare wires, their page shows these steps at once.

Your tenant’s page says:

  • Keep away. If it’s safe to reach and dry, switch off at the consumer unit (the fuse box).
  • If there’s fire or smoke, get out and call 999. For a power cut, call 105. It’s free.

A tenant who answers Is the power off? with Yes, just our home or Yes, the street too is also given the power cut number.

In the app, a power cut in the street always waits for you: it isn’t a job for an electrician. A report about the electrics, such as sparks or the power off in just your home, is an electrics repair, for the trade you chose for electrics.

What the app does when a tenant reports a danger

When a report names a danger such as a smell of gas, the app emails you at once. For a report made on your tenant’s page, it emails you again after 15 and 45 minutes until it’s opened. An email to your Selfmanaged address that names a danger is emailed to you once.

It’s an email, not a call. Selfmanaged doesn’t watch your properties and can’t make sure anyone sees it, and there’s a daily limit on these emails: beyond it, the report is in your app but not emailed.

  • The report stays at the top of Properties until you open it.
  • Your tenant’s page tells them when it was emailed to you, that you may not see it straight away, and the number you’ve given them to ring.
  • On Free, it waits for you to tap Send to your trade, emergencies included.

On Standard and Extra

If you’ve chosen it under Account › Trades, an emergency goes to your trade straight away, and the app asks whether you want to ring them. Some things always wait for you: a fire, someone hurt, something giving way, a power cut in the street.

Give your tenants a number to ring

Because the app’s alert is an email, your tenants also need a number they can ring out of hours. A new tenant page can’t be sent until you give one.

You give it under Account › Repairs and tenants’ settings › Repairs settings: your own number, or someone covering for you. Then tap Send Test Emergency to see the email reach your phone.

What the law says

In England, you must keep in repair and proper working order the installations for water, gas, electricity, sanitation, space heating and heating water. That doesn’t cover things your tenant is entitled to remove.

For your tenant’s own home, you aren’t liable for disrepair until you have notice of it. The work is then due within a reasonable time, which depends on the circumstances: the court decides.

Each gas appliance and flue you are responsible for must be checked by a Gas Safe registered engineer. The first check is within 12 months of installation, then at intervals of no more than 12 months.

Where your tenant reports that a smoke or carbon monoxide alarm is faulty, you must check it. If it is faulty, you must repair or replace it as soon as reasonably practicable. Some tenancies are excluded.

Your tenant must allow access for repairs you are entitled to do. GOV.UK recommends at least 24 hours’ written notice at reasonable hours, possibly shorter in an emergency.

In Selfmanaged

Set the number your tenants ring under Account › Repairs and tenants’ settings › Repairs settings, and choose which reports email you at once. Send Test Emergency shows you the email your phone will get.

On Free, each emergency waits for you to tap Send to the trade’s name. On Standard and Extra, it can go to your trade as soon as it’s reported, if you choose that under Account › Trades.

The steps are in Set up out-of-hours cover and emergency emails.

Where this comes from

General information about the law in England as it stood on 11 October 2026. It isn’t legal advice: for a particular tenancy, take advice.

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