Phones and enquiries

Spotting vulnerable callers with no heat or power

How trade offices can spot vulnerable callers with no heating or power, triage them fairly and escalate safety risks without overpromising.

Ava research teamPublished 7 min read

On this page
  1. Why a no-heat call is not always the same job
  2. Signals to listen for
  3. A two-minute triage routine
  4. Promise what you can keep
  5. When the diary is the wrong answer
  6. Signposting that helps
  7. Example: one cold evening, three calls
  8. Recording and reviewing priority calls
  9. Frequently asked questions
  10. References

Key takeaways

  • A no-heat call from an older, ill or isolated person is a different job from a no-heat call from a busy family, even when the fault is identical.
  • Listen for who is in the home, how cold it is, what they can and cannot do, and whether there is any sign of gas or carbon monoxide.
  • Give an honest arrival window and an interim plan; never promise a time you cannot keep.
  • Gas smells and carbon monoxide symptoms go to the National Gas Helpline first, not to your diary.
  • Record only what you need to prioritise the visit, and review priority calls every week.

Why a no-heat call is not always the same job

Most heating engineers, electricians and handymen already sort calls by urgency of the fault: a leaking pipe beats a dripping tap. What gets missed is the urgency of the person. A boiler that fails on a January evening is an inconvenience for a household with a spare fan heater and a car. For someone who is housebound, recovering from surgery or caring for a baby, the same fault can become a health risk within hours.

The scale is not small. In 2024, 13% of households in England said they could not keep warm during winter, and 63% said they had cut back their heating because of energy prices[1]. Many of the people who ring you on the first cold night have already been running their homes cooler than is comfortable, so a breakdown takes them from cold to too cold quickly.

Households in England and winter warmth, 2024
Households in England and winter warmth, 2024Comparison. Cut back heating because of energy prices: 63%; Unable to keep warm during winter: 13%.63%Cut back heating because of energy pricesCut back heating because of energy prices: 63%13%Unable to keep warm during winterUnable to keep warm during winter: 13%Households in England and winter warmth, 2024Comparison. Cut back heating because of energy prices: 63%; Unable to keep warm during winter: 13%.63%Cut back heating because of energypricesCut back heating because of energy prices: 63%13%Unable to keep warm during winterUnable to keep warm during winter: 13%

Source: Ministry of Housing, Communities and Local Government (GOV.UK), 2024[1]

Show the data
ItemValue
Cut back heating because of energy prices63%
Unable to keep warm during winter13%

None of this means you can fix everyone first. It means the person answering the phone needs a short, repeatable way to notice who is at greater risk and to put that into the diary decision, rather than relying on whoever sounds most upset.

Signals to listen for

Vulnerability is often temporary and rarely announced. People do not say "I am vulnerable"; they mention a hospital appointment, a new baby or a husband who cannot manage the stairs. Train office staff to treat these details as triage information and to ask one gentle follow-up question.

Common signals of vulnerability on no-heat and no-power calls, with a neutral follow-up question for each.
SignalWhat you might hearFollow-up question
Age or frailty"My mum is 90 and lives on her own"Is anyone with her today, and can she get to the door?
Health condition"I have a heart condition" or "I've just had an operation"Has your doctor told you to keep the home warm?
Young children"The baby's room is freezing"How old is the youngest, and do you have any safe temporary heat?
Powered equipment"Mum's oxygen machine runs off the mains"Is the equipment working now, and has the supplier given you a backup plan?
Communication needLong pauses, repeated questions, a relative speaking for themWould it help if I called a family member as well?
No safe heat source"The only other heater is an old gas fire we don't use"Please don't use it until it's been checked. Do you have blankets and hot drinks?

Write the signal into the job notes in plain words ("lives alone, 90, limited mobility") rather than a label. Plain words tell the engineer what to expect at the door.

A two-minute triage routine

  1. Rule out danger first

    Ask whether anyone can smell gas, or has a headache, dizziness or nausea that eases outside the home. If yes, stop the booking and follow your safety script (below).

  2. Confirm what has failed

    Heating only, hot water only, both, or all electrics? A tripped consumer unit and a dead boiler need different people.

  3. Ask who is in the home

    "Is there anyone in the house who is elderly, unwell, very young or relies on equipment?" Ask it of every caller so nobody feels singled out.

  4. Check what they can do tonight

    Spare electric heater, a warm room, a neighbour or relative they can stay with. This shapes how urgent the visit really is.

  5. Give an honest window

    Offer the earliest slot you can genuinely keep and explain what happens if an earlier one opens up.

  6. Agree a check-in

    Set a time you will call back, and who to call if the situation changes.

Asking the household question of everyone is the important habit. It is less awkward than guessing from a voice, and it catches the cases where the caller is a son or daughter ringing on behalf of a parent across town.

Promise what you can keep

The pressure on a cold evening call is to say "we'll be there tonight" to end the conversation kindly. If that slot then slips, the person who most needed certainty is left waiting by the window. A shorter, honest promise does more good.

  • Say what you can do: "Our first engineer free is tomorrow between 8 and 10. I've marked you as a priority, so you'll be first on that list."
  • Say what you will do if things change: "If a job cancels tonight, I'll ring you before 8 pm."
  • Offer interim help you can actually provide: lending a heater, a phone call to talk through a boiler reset, or a referral to another local engineer if you cannot get there in time.
  • Avoid medical advice. You can say "if anyone feels unwell, please call NHS 111 or 999"; do not judge how serious a symptom is.

Priority is a promise about order, not about time. Tell the caller where they sit in the queue and when you will next speak, and then keep that call-back appointment even if you have no news.

When the diary is the wrong answer

Some calls should not be booked at all until a safety step has happened. If a caller reports a smell of gas or symptoms that could be carbon monoxide, the NHS advises calling the free National Gas Helpline on 0800 111 999, which is open around the clock[2]. The NHS lists gas boilers, gas cookers, gas or paraffin heaters and wood, gas and coal fires among the appliances that can produce carbon monoxide if they are faulty or poorly installed[3].

That matters on no-heat calls because people improvise. A household whose boiler has failed may light an old gas fire, use a camping heater indoors or leave a gas oven door open. Only 62% of dwellings in England had a carbon monoxide alarm in 2024[4], so a good share of your callers have no warning if their stop-gap heat goes wrong. Ask what they plan to use overnight, and if it is anything with a flame, say clearly that it should not be used until it has been checked.

For power failures, check whether the fault is inside the property (a tripped breaker, one dead circuit) or wider (the whole street is dark). A street-wide cut belongs to the electricity network operator, not to you; explain that kindly and help the caller find the right number.

Signposting that helps

Many callers do not know that energy networks and suppliers keep a priority support register. Citizens Advice explains that people can usually join if they have reached State Pension age, are disabled or have a long-term health condition, have children under 5, are pregnant, or would struggle to smell gas, and that support can include advance notice of planned power cuts and extra help during one[5]. A one-line mention at the end of a call costs nothing and may help them the next time.

If the caller is a tenant, ask who the landlord or agent is and whether they have reported the fault. Social landlords in England now have to investigate and make safe an emergency hazard within 24 hours of becoming aware of it under Awaab's Law[6]. Copying the landlord's repairs line into your notes, and encouraging the tenant to report it there as well, keeps the person who is legally responsible in the loop and helps you get paid.

Example: one cold evening, three calls

Example (fictional). A two-engineer heating firm in Leeds has one evening slot left on a frosty Tuesday. Three no-heat calls arrive within an hour. Caller A is a working couple with a combi boiler showing a pressure fault; they have an electric heater. Caller B is a woman ringing about her 88-year-old father, who lives alone with no other heat and sounds confused on the phone. Caller C is a landlord reporting a tenant's boiler fault, with no detail about the occupants.

The office talks Caller A through a pressure top-up over the phone and books a morning check. Caller B gets the evening slot, and the office asks the daughter to stay on the phone with her father until the engineer arrives. Caller C is asked to confirm who lives at the property before a slot is chosen; the tenant turns out to be a young family with a portable heater, so the job goes first on the morning list. Nobody was refused, and every caller left with a time and a reason.

Recording and reviewing priority calls

Information about someone's health is special category data under UK GDPR, so collect only what you need to prioritise and protect the visit, and do not copy it into marketing lists. A simple flag with a short note is usually enough.

  1. Use one priority flag in your job system, with a free-text reason and the date it was added.
  2. Remove or review the flag when the job closes; temporary vulnerability should not follow someone for years.
  3. Once a week, look at every flagged job: was the promised window kept, was the check-in call made, and did the engineer have what they needed?
  4. Share one anonymised example at a team meeting each month so office staff and engineers learn the same habits.

Done consistently, this turns kindness from something that depends on who picks up the phone into part of how the business runs.

Frequently asked questions

Who counts as a vulnerable customer for a trade business?

Anyone whose age, health, disability, young children, communication needs or circumstances mean a fault puts them at greater risk or makes it harder for them to cope. It is often temporary, such as recovery from an operation.

Should vulnerable customers always be seen first?

Not automatically. Use risk to the person alongside the fault and the safety of any stop-gap heating. Be honest about the order and the time, and keep in touch while they wait.

What should we do if a caller smells gas?

Do not book a routine visit. Advise them to call the National Gas Helpline on 0800 111 999, open the windows if it is safe and avoid using switches or flames, then follow up once the emergency service has attended.

Can we keep notes about a customer's health?

Only what you need to deliver the job safely, kept securely and reviewed when the job closes. Health details are special category data under UK GDPR, so avoid copying them into other systems.

References

  1. Ministry of Housing, Communities and Local Government (GOV.UK) (2024). English Housing Survey 2024 to 2025: perceptions and impacts of housing quality (opens in a new tab) ↑

  2. NHS (2025). Carbon monoxide poisoning (opens in a new tab) ↑

  3. NHS (2025). Carbon monoxide poisoning (opens in a new tab) ↑

  4. Ministry of Housing, Communities and Local Government (GOV.UK) (2024). English Housing Survey 2024 to 2025: housing quality and energy efficiency, chapter 1 (opens in a new tab) ↑

  5. Citizens Advice (2026). Getting extra support from your energy supplier (opens in a new tab) ↑

  6. Ministry of Housing, Communities and Local Government (GOV.UK) (2026). Awaab's Law: guidance for social landlords - timeframes for repairs in the social rented sector (opens in a new tab) ↑

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