Gas Safe registered engineers and Baxi Works members. Potterton Promax, Titanium and Gold faults tested, not guessed: E133, E119, E110 and E125.
We repair Potterton boilers across Birmingham and the Black Country: the Promax, Titanium and Gold ranges, and the older Powermax. Potterton is part of the Baxi Heating family and uses the same style of E codes. 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 carry common Potterton spares on the van. We are Gas Safe registered (594385), and every repair finishes with a flue gas analyser reading. Where a Potterton is past repair we say so: in Erdington we replaced a condemned Powermax with a new combi.
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.
Potterton shows E codes on the Promax, Titanium and Gold. The code tells us where to start testing, not which part has failed. These are the ones we are asked about most.
| Code | What it means | Usual causes |
|---|---|---|
| E133 | Gas supply interrupted, ignition failure or no flame detected | Gas supply, frozen condensate pipe, electrode, gas valve |
| E119 | Water pressure below about 0.5 bar | Leak on the system, expansion vessel, pressure relief valve |
| E110 | Safety thermostat has operated (overheat) | Low pressure, pump, airlock, sludge |
| E125 | Primary circulation fault | Pump, airlock, blockage |
| E130 | Flue temperature sensor has operated | Flue system. Stop if it returns after one reset |
| E160 | Fan fault | Fan or its wiring |
Press reset once. If the code comes back, stop resetting and ring us with the code and the model. Do not keep resetting an overheat (E110) or flue (E130) fault. Our guide lists the full set of Potterton fault codes, checked against Potterton's own user and installer guides, and our Baxi boiler repair page covers Baxi and Main, which share the same family of codes.
The Promax, Titanium and Gold, and the older floor-standing Powermax with its built-in hot water store. When you call, have the model name and the code on the display, or send a photo by WhatsApp.
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. A Baxi or Main Eco Compact combi swap is £1,999 with a five-year warranty, and a Baxi 600 is £2,199 with seven years, both confirmed in writing after a free survey.
Some are past repair. In Erdington in October 2026 a landlord's Potterton Powermax had been condemned and labelled Do Not Use, leaving the tenant without heating or hot water. The Powermax is a tall floor-standing unit with a hot water store built in underneath, and it filled the cupboard. We took it out and fitted a wall-hung Baxi 400 combi with a magnetic filter and scale reducer, with the new flue properly supported, and the tenant got most of the cupboard back.
An older boiler earns its annual service more than a new one. 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. On an older Potterton the service is also when we can tell you honestly how much life it has left and which parts are still obtainable.
One so far, written up with the photos our engineers took. More are added as we do them.
The Powermax had been labelled Do Not Use, so the landlord asked us to quote. Out came the floor-standing boiler and hot water store; in went a wall-hung Baxi combi with a Sentinel filter and scale reducer, the system flushed and the vertical flue properly supported.
Read the case studyWe also repair Worcester Bosch, Vaillant, Baxi, Ideal, Glow-worm, Viessmann and Ferroli boilers. Every other make is covered on our main boiler repair page.
| Job | Price |
|---|---|
| Potterton 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 |
| Baxi or Main Eco Compact combi swap, fitted (5-year warranty) | £1,999 |
| Baxi 600 combi swap, fitted (7-year warranty) | £2,199 |
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.
E133 means the gas supply was interrupted, the boiler failed to ignite or no flame was detected. Check the gas is on and that other gas appliances work. In freezing weather, thaw the white plastic condensate pipe outside with warm, not boiling, water, then reset once. If the code comes back, the cause is likely to be the electrode or the gas valve, and that is work for a Gas Safe registered engineer.
E119 means the water pressure in the heating system has fallen below about 0.5 bar. With the boiler cold, top up through the filling loop until the gauge reads between 1 and 1.5 bar, then close the loop. If it needs topping up repeatedly there is a leak or a failed part to find.
Potterton is part of the Baxi Heating family, and its boilers use the same style of E codes as Baxi and Main. We repair all three, and our Baxi boiler repair page covers Baxi and Main in more detail.
No, and we would rather say so. We are Gas Safe registered (594385) and members of Baxi Works, the installer scheme of the Baxi family that Potterton belongs to, which is a loyalty scheme and not an approval. For repairs we work as independent engineers: we test before replacing anything, and we will tell you when a repair is not worth doing.
Repair it unless it is past about twelve years old, on its second or third major part, its heat exchanger is corroding or the part it needs is no longer made. We check first and show you what we find. If it is time, a Baxi or Main Eco Compact combi swap is £1,999 with a five-year warranty, 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.
