AI receptionist for heating engineers: a boiler breakdown gets a slot, even in the first cold snap.
Sayelo, the AI voice agent and AI receptionist for heating engineers, answers 24/7. Error code and make noted, contract customers first, annual services scheduled: the agent answers when the first cold snap hits. From €39/month excl. VAT, 14-day free trial, no set-up fees.
On the first frosty morning, everyone calls at once, and you're already working on a boiler. Sayelo answers, notes the make and the error code, recognises customers with a maintenance contract and puts them first, and books annual services into your slots. The AI announces itself in its very first sentence.
from €39 excl. VAT/month afterwards · no commitment · the AI announces itself on every call
A heating engineer works to the rhythm of the seasons: services to schedule all year round, then an avalanche of breakdowns on the day of the first cold snap. That day, the line jams, and every missed call is a household without heating looking for another engineer before nightfall.
Sayelo's AI receptionist answers all these calls, at the same time if need be. It introduces itself as an AI assistant, notes the boiler's make, model and error code, recognises customers with a maintenance contract and puts them in your priority slots, and books annual services in your calendar. If there's a smell of gas, it books no appointment: it passes on your safety advice and directs the caller to the gas emergency number. You receive every call by SMS and email, summarised and transcribed, and you decide all the rules.
Day to day
What heating engineers deal with on the phone.
The first-cold-snap avalanche
The day the temperature drops, the boilers that held out all summer give up together. The line jams, messages pile up, and every call that isn't taken is a customer looking for another heating engineer before nightfall.
The error code you need before setting off
Setting off without knowing the make, the model and the code displayed means risking a wasted trip. But getting it over the phone takes five minutes you don't have when you're on a job.
Annual services to fit in all year round
The annual service has to be planned in advance, preferably out of season. You have to call customers back, find a slot, confirm. Nobody has time in winter, and in summer everybody forgets.
Contract customers who want to be seen first
A customer who pays for a maintenance contract expects to be served first. If they get voicemail like everyone else, the contract loses its value, and you lose the customer too.
How much are your missed calls costing you? Work it out in one minute with the calculator.
What the agent does
What your AI receptionist does for a heating engineer.
Notes the make, model and error code
Before any call-out, the agent notes the make, the model if the customer knows it, the code displayed and the symptom: no heating, no hot water, water leaking under the boiler. The technician sets off with the right part in mind.
Recognises customers with a maintenance contract
If your customers are in Sellsy or monday.com, the agent recognises them as soon as it answers; otherwise it asks. A contract customer is put into your priority slots, as you've decided.
Books annual services
The agent offers a real slot from your calendar for the annual service, confirms it by SMS and sends a reminder the day before. Out of season, it fills the quiet weeks.
Sorts breakdowns according to your rules
No heating with a baby or an elderly person in the home, water leaking under the boiler, smell of gas: each situation follows the rule you've set, from immediate transfer to an appointment the next day.
Gives your advice for the wait
Check the pressure, reset the boiler once, turn off the water supply if there's a leak: the agent passes on the advice you've written, and only that. It never plays the technician.
Qualifies replacement requests
Boiler to replace, heat pump, switching to gas or electric: the agent notes the property, the current energy source and the project, and prepares a callback for the quote, without stating a price or any grant.
Emergencies
Emergencies: what gets transferred, and when.
- Smell of gas: safety advice (ventilate, don't switch anything on, get out), then referral to the gas emergency number, never an appointment
- No heating in winter with a baby, an elderly or sick person in the home: transfer or priority visit according to your hours
- Water leak under the boiler: advice to turn off the water supply, then a priority appointment
- Customer with a maintenance contract: priority slots you set aside
- Annual service, replacement quote, question about an invoice: appointment or callback from you
You specify who takes emergencies and at which times: your mobile during the day, the on-call engineer at winter weekends, the office for quotes. The agent states the call-out charge and the price of a service as you've set them up, and promises no replacement date or financial assistance.
Each transfer number can be offered only at certain times, in your country's time zone: an on-call line in the evening and at weekends then takes priority over the usual number. Outside these times, the agent takes a message and sends it to you. The transfer is direct: if nobody answers, the caller reaches the voicemail of the transfer number.
Step by step
A typical call, from the first ring to the summary.
The ring
The agent answers while you're working on a boiler, and introduces itself as the company's AI assistant.
The symptom
No heating, no hot water, noise, leak, code displayed: it notes what's happening and since when.
The boiler
Make, model, error code, maintenance contract or not: it notes what's needed to set off with the right part.
The slot or the transfer
Contract customer or vulnerable household: priority visit or transfer. Otherwise, a real slot from your calendar, confirmed.
The SMS
The customer receives the confirmation and your advice for the wait by SMS. You receive the job sheet: address, make, code, contract.
The summary
After the call, an email with the summary, the actions taken and those still to do, and the full transcript. Quotes to call back appear in “Activity” → “Calls”, with the “To do” filter.
Calendar and tools
Your appointments in your calendar, your calls in your tools.
Your services and repairs go into your calendar, in Google Calendar, Microsoft 365 or Cal.com, in the slots you open, with priority slots for contract customers. If your contracts are in Sellsy or monday.com, the agent recognises the customer as soon as it answers; each job can also go to your invoicing software by webhook.
- Your calendar read live, in Google Calendar, Microsoft 365 or Cal.com: real slots, double-booking lock, confirmation and SMS reminder the day before
- SMS sent during the call, with the caller's consent: address, booking link, instructions you've prepared
- Email summary after every call, full transcript, and webhooks to your business software
Sellsy and monday.com connected natively, all your other tools via outbound webhooks. All integrations →
Number and setup
Your number, your setup.
You keep your current number by forwarding it to your agent's number. Your agent also receives a number according to your country's rules: see Sayelo in your country.
Ready in 5 minutes: your agent guides you in writing, on WhatsApp or with a form, reads your website, and you listen to its voice before choosing it. Our team then fine-tunes the settings with you. Numbers and telephony are provided by a partner operator registered with ARCEP (the French telecoms regulator). How it works →
Comparison
Voicemail, call answering service or Sayelo?
| Voicemail | Call answering service | Sayelo | |
|---|---|---|---|
| Available 24/7 | Passive | Extended hours | Round the clock |
| Immediate answer | — | Queue | Yes |
| Error code and make noted | No | Depends on the script | Yes, before any call-out |
| Contract customers first | No | Rarely | Yes, recognised or identified |
| Annual services scheduled | No | Yes, after a callback | Yes, in your calendar |
| Summary & transcript | No | Varies | Yes |
| Cost | Low, ineffective | High | Fixed, from €39/month excl. VAT |
Pricing
Clear pricing, from €39/month excl. VAT.
14-day free trial. No fixed-term commitment: cancel at any time, with 30 days' notice. Minutes, SMS and the number of agents depend on the plan: see pricing and plan details →
Frequently asked questions
Questions from heating engineers.
Does the agent note the boiler's error code?
Yes, it's one of its first questions, along with the make and the symptom. The code and the model are repeated back for checking, then sent to the technician by SMS and in the summary, so that they set off with the right part and don't have to make two trips.
How are customers with a maintenance contract handled?
If your contracts are in Sellsy or monday.com, the agent recognises the customer as soon as it answers. Otherwise, it asks whether they have a contract. Either way, it applies your priority rules: reserved slots, direct transfer or a visit the same day.
And if there's a smell of gas?
The agent books no appointment. It passes on the safety advice you've defined, usually to ventilate, switch nothing on and get out, then directs the caller to the gas emergency number. The call is flagged to you immediately.
Can it schedule annual services?
Yes. It offers a real slot from your calendar, confirms by SMS and sends a reminder the day before. You can set aside out-of-season slots to even out your workload, and it fills the quiet weeks without you having to call every customer.
What happens at the weekend in the middle of winter?
The agent answers just as on weekdays, sorts calls according to your rules and transfers priority breakdowns to the on-call number you've set for those times. For everything else, it books an appointment in the first available slot and sends your advice for the wait by SMS.
Will my clients know they're talking to an AI?
Yes, the agent says so in its very first sentence. A customer with no heating mainly wants an immediate answer, a visit time and someone who has noted the error code correctly: they get all that, even when everyone is calling at once.
Can I keep my number?
Yes. You keep your current number, as you prefer: by forwarding it to your agent or, in France, by porting it, on all plans. A new number is also included from the start of the trial, if you would rather start from scratch. Either way, the number printed on your contracts and your boilers always gets answered.
Updated on 25 October 2026.
Other industries
Sayelo for other industries.
- answering plumbing emergencies by phone: Active leak or bathroom quote: the agent tells the difference, notes the address and transfers the emergency.
- AI receptionist for electricians: Circuit breaker that keeps tripping, burning smell or EV charger: the agent sorts out the fault, gives your advice and books the diagnostic visit.
- the AI voice agent for locksmiths: Locked out, lost keys, burglary: the agent reassures, states your real charges and alerts the on-call locksmith.
Guides: AI receptionist: the complete guide · Tradespeople: stop missing calls · How much does a missed call cost? The calculation · Seasonal call peaks: spotting and absorbing them
AI receptionist: all industries · Sayelo for trades & construction · AI voice agent for tradespeople
Hear it answer
before you decide.
The agent calls you back on your mobile and plays the receptionist for a heating engineer. Three minutes, free, no bank card needed.