On the phone
The call-out cost and any supplement.
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Heating Engineer Cost: What You Pay for a Repair, a Service or a New Boiler
In short: at Service Technic Belgium the call-out cost is given on the phone and the cost of a repair before it starts; an installation always comes with a written quote. This page explains what a heating engineer's invoice is made of. Call 0477 03 88 98.
Nobody can give a fair price for a boiler they have not seen: a dirty electrode and a burnt-out board sometimes show the same code. What we can do is tell you clearly how the price is built up, and start nothing without your agreement.
5,0on Google· 22 years of experience
Call-outGiven on the phone
RepairPriced before it starts
ServicePrice given when booking
InstallationFree written quote
The three parts of a repair invoice
After a breakdown, a heating engineer's invoice reads in three lines: the call-out, the working time and the parts. The call-out covers the technician coming with his van and tools; it is given on the phone, before he sets off.
Working time starts on arrival: diagnosis, measurements, dismantling, repair, restart and tests. Beyond the first hour it is counted by the quarter hour, so a fault found quickly costs less than one that hides.
Parts are listed one by one with their reference. The technician tells you which one needs changing and what it costs before fitting it; if it is not in the van, he offers to come back once it has arrived.
What makes a repair cost more or less
The age and make of the boiler matter a lot. A common part for a recent Vaillant or Bulex is at the wholesaler; for a thirty-year-old appliance you sometimes have to look for an equivalent or give up on the repair.
Access counts too: a boiler in a narrow cupboard, in the attic or in a building plant room takes longer than a wall-hung boiler in a kitchen. A shared plant room is rarely repaired in an hour.
Then there is the timing: in the evening, at night, on Saturday and Sunday a supplement applies. It is given on the phone, so you can choose between coming now and an appointment on the next working day.
The price of a boiler service
A service is the easiest visit to price: it depends mainly on the fuel and the type of appliance. The price is given when you book, for a wall-hung gas boiler, a floor-standing boiler or an oil boiler.
An oil boiler takes more work: brushing the combustion chamber, replacing the nozzle and filter, adjusting the burner. A gas boiler that has not been opened for years also takes longer than one serviced every year.
The price includes the cleaning, the checks, the combustion analysis and the attestation. If a wear part has to be replaced, the technician tells you and you decide. The details are on our page about boiler service cost.
Installing or replacing a boiler: the quote
For a new boiler, the price is never given on the phone. The technician comes to see the plant room, the flue, the radiators, the gas supply and the space available, then gives you a detailed written quote.
The quote covers the appliance, removing the old one, the connections, adapting the chimney or the balanced flue, commissioning and the documents. What is not in the quote is not invoiced without your new agreement.
The VAT rate depends on your home and the type of works, and the quote shows it clearly. The person preparing it also explains the options, such as a heat pump or a hybrid boiler.
How to avoid nasty surprises
Be wary of a very low price given without a single question about your appliance: the difference often reappears on site, as supplements or parts. A serious heating engineer asks questions before coming.
Always ask for a signed job sheet and an invoice in the company's name, with its company number. You need them for the manufacturer, for your insurance and when renting.
Send a photo of the boiler label and of the code shown. With the make and model, the office can tell you more precisely what to expect, and the technician comes with the right parts.
An example: a boiler that keeps locking out
A customer calls about a wall-hung gas boiler that locks out two or three times a day. On the phone we give him the call-out cost and ask for the code and a photo of the label.
On site, the technician measures and finds a worn ionisation electrode and a dirty condensate trap. He explains both and gives the price of the electrode; the customer agrees, and the trap is cleaned at the same time.
The invoice shows the call-out, the time spent and the electrode. The customer keeps the job sheet and learns that a yearly service would probably have prevented the fault: it is noted for next year.
What you know beforehand
On site
The diagnosis and the repair price.
For a service
The price when booking.
For an installation
A written quote after a visit.
What helps us price it
The label
Make, model and year of the boiler.
The code
A photo of the display.
Access
Where the boiler is, which floor.
The fuel
Gas, oil, pellets or propane.
From your call to the invoice
A short call
Address, appliance, what is wrong: the office writes it down and books a time.
No surprises
You know the call-out cost before anyone leaves; a replacement or a new installation gets a written quote.
On site
Diagnosis and explanation first, then your agreement, then the work. The documents come from Service Technic Belgium.
What our customers say
Heating engineers across Belgium
Our heating engineers work in Brussels, Wallonia and Flanders, for households, landlords and syndics.
BrusselsWalloon BrabantFlemish BrabantHainautNamurLiègeLuxembourgAntwerpEast FlandersWest FlandersLimburg
Frequently asked questions
How much does a heating engineer cost?
It depends on the job: a repair is made of the call-out, the time spent and the parts; a service has a price known when you book; an installation comes with a written quote.
Is the call-out charged even if the fault is fixed quickly?
Yes, the call-out is always charged; it is given to you before the technician sets off.
Is the quote for a new boiler free?
Yes, the quote for an installation or a replacement is free and detailed.
Is there a supplement in the evening and at weekends?
Yes, a supplement applies in the evening, at night, on Saturday and on Sunday. It is given on the phone.
Can I refuse the repair after the diagnosis?
Yes. The technician gives you the price before repairing; if you refuse, only the call-out and the diagnosis time are due.
How can I pay?
On site or by bank transfer, with the QR code on the invoice. You receive the invoice in the name of Service Technic Belgium.
How do I book?
Call 0477 03 88 98, send us a WhatsApp message or book online with the « Book an appointment » button. Tell us the municipality and, in a few words, what is going on.
A question about a price?
Call 0477 03 88 98 with the make of your boiler: we tell you the call-out cost and how the repair will be priced.