Independent Gas Safe registered engineers. Vitodens faults tested, not guessed: ignition lockouts, overheat and sensor faults, and full strip-down servicing.
We repair and service Viessmann boilers across Birmingham and the surrounding towns, mainly the Vitodens 050-W, 100-W and 111-W. In office hours (Mon–Fri 8am–5.30pm) the callout is £99, which covers a full diagnosis and the first hour of labour, and you get the total price before we fit anything. We are independent of Viessmann and Gas Safe registered (594385), and every repair finishes with a flue gas analyser reading. The Viessmann work we have written up so far is two full strip-down services, in Sutton Coldfield and Edgbaston.
Four details and we will get back to you to arrange a time. Prefer to talk? Call 07413 385767.
£99 in office hours (Mon–Fri, 8am–5.30pm) covers attendance, diagnosis and the first hour. Parts and any further work are quoted and agreed before we carry on. Out of hours, the price is quoted by phone before we set off.
No travel charge within 10 miles of B20 2JS. Further out, £2 per mile may apply — always agreed before anything is booked. Full price list
Smell gas now? Do not use this form or wait for a reply. Call the National Gas Emergency Service free on 0800 111 999 (24 hours). If you are using a mobile, make the call from outside. Open doors and windows, do not switch electrics on or off, do not smoke or use naked flames, and turn the gas off at the meter if it is safe to do so, unless the meter is in a cellar or basement. Once the supply has been made safe, we can trace and repair the fault.
Viessmann has used two different sets of codes across generations of the Vitodens, so the same number can mean different things on different models. The code tells us where to start testing, not which part has failed.
| Code | What it means | Usual causes |
|---|---|---|
| F4 | No flame signal: ignition lockout | Gas supply, electrode, gas valve, frozen condensate pipe |
| F2 | Temperature limiter has responded (overheat) | Low pressure, pump, airlock, sludge |
| F1 | Maximum flue gas temperature exceeded | Flue or combustion. Stop using the boiler |
| F3 | Flame signal already present at burner start | Gas valve or electronics. Do not reset |
| F9 | Fan speed too low at burner start | Fan or its wiring |
| 30 / 38 | Boiler water temperature sensor short or open circuit | Sensor or its wiring |
| 0b | Inadequate water flow (Vitodens 100-W) | Low pressure, pump, blockage |
Press reset once. If the code comes back, stop resetting and ring us with the code and the model. With F1 or F3 do not reset at all: switch the boiler off and call, and if you can smell gas ring the National Gas Emergency Service on 0800 111 999 first. These are the codes for the Vitodens 050-W, 100-W and 111-W; older models differ, so check the model on the data plate. Our guide lists the full set of Viessmann fault codes and says which range each applies to, checked against Viessmann's own manuals.
The Vitodens 050-W, 100-W and 111-W, as combi and system boilers. Because Viessmann has changed its codes between generations, the model matters more than on most makes. When you call, have the model from the data plate and the code on the display, or send a photo by WhatsApp. Our van stock covers the makes we see most, so a Viessmann part is usually ordered to the model once the fault is diagnosed, and you get the price before we order it.
There is a point at which a boiler is not worth repairing: past twelve years old, on its second or third major part, with a corroding heat exchanger. If yours is there, we will say so and put the repair price and the replacement price side by side. New boilers start at £1,999 fitted, confirmed in writing after a free survey.
We say it before it is urgent, too. The Edgbaston Vitodens passed its service and runs safely, but it is starting to show its age, and we told the customer plainly that it would be wise to start planning a replacement over the coming years rather than be caught out by a breakdown.
Viessmann, like every manufacturer, ties its guarantee to an annual service. A basic service is £95 and includes a combustion check on the analyser; an intermediate service is £125 and a full strip-down is £185 with gaskets and an inhibitor top-up included.
A full strip-down on a Viessmann means the fan and burner assembly out, the burner door and its insulation cleaned, the inside of the heat exchanger cleaned, new gaskets and seals, the electrodes and condensate trap checked, and the combustion proved on the analyser afterwards. On a Viessmann in Sutton Coldfield we photographed each stage, then walked the house and bled every radiator.
Two so far, both services rather than breakdowns, written up with the photos our engineers took. More are added as we do them.
Heat exchanger stripped and cleaned on a Viessmann that is showing its age, then the Tempest cylinder serviced on the same visit. Customer given a straight view on when to start planning a replacement boiler.
Read the case studyWhat a full strip-down actually involves, photographed as we went: fan and burner out, burner door and heat exchanger cleaned, gaskets replaced. Then a walk round the house to bleed every radiator.
Read the case studyWe also repair Worcester Bosch, Vaillant, Baxi, Ideal, Glow-worm, Potterton and Ferroli boilers. Every other make is covered on our main boiler repair page.
| Job | Price |
|---|---|
| Viessmann fault diagnosis + first hour of repair (Mon–Fri 8am–5.30pm) | £99 |
| Outside office hours | Quoted by phone before we set off |
| Parts | Quoted before we fit |
| Parts-only warranty on repairs | 12 months |
| Basic boiler service (combustion check included) | £95 |
| Intermediate boiler service | £125 |
| Full strip-down service (gaskets and an inhibitor top-up included) | £185 |
| New combi boiler, fitted | from £1,999 |
The £99 is a fixed charge for attendance, diagnosis and the first hour in office hours (Mon–Fri 8am–5.30pm); it is not the price of every repair, and parts and further work are quoted and agreed before we carry on. Service prices are the price for the job as described, installation prices are confirmed in writing after a free survey, and out-of-hours work is quoted by phone before we set off. No travel charge within 10 miles of B20 2JS; further out, £2 per mile may apply, agreed before booking. How our prices work.
£99 diagnosis + first hour
£99 in office hours (Mon–Fri, 8am–5.30pm) covers attendance, diagnosis and the first hour. Parts and any further work are quoted and agreed before we carry on. Out of hours, the price is quoted by phone before we set off.
No travel charge within 10 miles of B20 2JS. Further out, £2 per mile may apply — always agreed before anything is booked.
In office hours (Monday to Friday, 8am to 5.30pm), £99 covers the callout, a full diagnosis and the first hour of labour. Once we know the fault you get the total price, including any part, before we carry on. Out of hours, we quote by phone before we set off.
On the Vitodens 050-W, 100-W and 111-W, F4 means no flame signal: the burner tried to light and has locked out. Check the gas is on and that other gas appliances work, and in freezing weather thaw the white plastic condensate pipe outside with warm, not boiling, water. Then reset once. If F4 returns, the cause is likely to be the gas supply, the electrode or the gas valve, and that is work for a Gas Safe registered engineer.
F2 means the temperature limiter has responded: the boiler has overheated, usually because the water has stopped moving. Check the pressure gauge and top up through the filling loop if it is low, then reset once. If F2 returns, stop using the boiler and book an engineer.
No, and we would rather tell you than let you assume. We are not part of any Viessmann service network or installer scheme. We are independent Gas Safe registered engineers (594385). For a repair, what matters is a proper diagnosis and the right part.
Yes. A basic service is £95, an intermediate service £125 and a full strip-down £185 with gaskets and an inhibitor top-up included. Two of our Viessmann strip-down services, in Sutton Coldfield and Edgbaston, are written up with photos.
Repair it unless it is past about twelve years old, on its second or third major part, or its heat exchanger is corroding. We check first and show you what we find. If it is time, new boilers start at £1,999 fitted, confirmed in writing after a free survey.
We cover Birmingham and the surrounding towns. Pick your area for local detail.
From £1,999 fitted
From £95
£90 (boiler + cooker)
£99 (Mon–Fri 8am–5.30pm)
From £99 in office hours
From £550, up to 10 radiators
£99 in office hours covers diagnosis and the first hour. You get the total price before we fit anything.
