Potterton boiler repair in London
We repair current and older Potterton boilers. Ring us, day or night.
- Potterton Promax and Suprima repaired
- All our engineers are Gas Safe registered
Makes we repair
How does booking a Potterton repair work, and what does it cost?
Booking: ring us any time, day or night, or send your details and we ring you back. We'll ask what the boiler is doing, and its model and any code on the display if you can see them. You don't need to know what's wrong. Finding the fault is the engineer's job. Then we tell you when an engineer can come, anywhere in Greater London.
What it costs: a repair's price depends on the part it needs, how long the job takes and when it's done. Our rates are higher in the evening, overnight and at weekends. Once the engineer has found the fault, the rate for the repair is agreed in writing before any work starts.
What happens on a Potterton repair visit?
A repair visit has three stages.
1. Before anything is touched
The engineer covers the floor around the boiler and asks what you have seen and heard since you rang.
2. Finding the fault
The engineer tells you which part has failed, whether they have it with them or must order it, and how long the work should take. No work is done until you say yes.
3. The repair
The engineer fits the part and checks the boiler runs as it should before leaving. The repair is guaranteed for 12 months, covering the parts we fit, the labour and any return visit.
What goes wrong on Potterton boilers most often?
Potterton's own user guides come back to the same problems:
- Low pressure. The code is E119 on the Promax, Titanium and Gold, and E118 on the Assure and Ultra. Needing to top up often means a leak or a fault, which needs an engineer.
- A blocked condensate pipe. The newer guides name it, above all where the pipe runs outside in freezing weather.
- No heating or hot water. The guides look at the gas, the power, and the timer and thermostat before the boiler itself.
- A code that comes back. The guides allow a reset for some codes, then say to ring an engineer if it fails or returns.
- Pressure too high. At 3 bar the relief valve opens, and the boiler needs an engineer.
Whichever it is, we'll ask what the boiler is doing when you ring.
Sources: Potterton's user guides for the Promax Combi, the Titanium Heat, the Assure System and the Promax Ultra Combi.
Potterton fault codes and what they mean
Potterton boilers with a display show E and a number, such as E110. The Titanium Heat uses a coloured light instead.
Low pressure is E119 on the Promax, Titanium and Gold, but E118 on the Assure and Ultra, so we'll ask for the model too. The manuals allow a reset for E110, E130 and E133. A code that keeps coming back after a reset needs an engineer.
Green lightA Potterton boiler flashing a green light: which boiler is it?
What it means: A flashing green light means different things on different Potterton boilers, so we'll ask which you have and how it flashes.
- Titanium Heat: a flashing green light is a warning. The boiler has found a problem and keeps trying to restart. It goes back to normal once the problem clears, or locks out and turns red.
- Suprima 30L to 100L: a green light flashing on its own is normal running. A red light flashing with it means a fault.
- Gold Combi: both green lights flashing with SF on the screen is an engineer's test mode, not a fault.
On the Titanium Heat, the number of quick flashes between pauses names the fault:
- 1 flash for temperature protection
- 2 for a shutdown signal
- 3 for the flame lost
- 4 for a communication fault
- 5 for a settings fault
- 6 for another internal fault
What you can do: on a Titanium Heat, the user guide's own steps look at:
- the power
- the gas tap
- a prepayment meter's credit
- the timer and thermostat calling for heat
If the light turns red, hold the reset button for at least 5 seconds. If the fault keeps coming back, or the red light stays on, ring us.
E118Potterton E118: the water pressure is too low, on the Assure and the Promax Ultra
What it means: E118 on a Potterton boiler means the heating's water pressure has fallen below 0.5 bar, and the boiler has stopped. The Assure Combi and Assure System, the Promax Ultra Combi and the Ultra System show it.
Low pressure is E119 on the Promax Combi and System, the Titanium Combi, the Gold Combi and the Heatmax instead. The Titanium Heat has a light, not a code, so we'll ask for the model when you ring.
Possible causes, as the manual lists them:
- the pressure itself, to be restored
- then, if the gauge reads right, the supply to the pressure switch or sensor at the main board
- the switch or sensor
- last, the board
What you can do: top up at the filling loop, as the user guide shows. The loop is two taps and a separate pipe, on the boiler or the pipework near it.
- Fit the pipe.
- Open one tap fully.
- Open the other slowly while you watch the gauge.
- Close both taps.
- Take the pipe off.
Each guide closes the taps at its own pressure:
- between 1 and 1.5 bar on the Assure
- 1 bar or more on the Promax Ultra Combi
- between 1 and 2 bar on the Ultra System
The Assure's guides say the boiler then resets by itself. If you can't find the filling loop, ring us.
If E118 comes back, or the pressure keeps falling, ring us. The Assure's and the Ultra System's guides say needing to top up regularly means a fault or a leak. We'll ask what the gauge reads.
E110Potterton E110: the safety thermostat has tripped
What it means: The heating water got too hot, and the overheat thermostat shut the boiler down.
The manual's steps, in order:
- a reset
- the overheat thermostat, whether it has tripped or failed
- the main board
What you can do:
- See that the pressure gauge's needle is in the green.
- Turn the selector fully anticlockwise to Reset.
- Hold it there for at least 5 seconds.
If the boiler won't relight, or E110 comes back, it needs an engineer.
E130Potterton E130: the flue has overheated
What it means: The flue sensor has tripped because the flue got too hot.
Possible causes, as the manual lists them:
- the heating and flue sensors
- then, if the pump is running, a heat exchanger blocked inside
What you can do: reset the boiler as for E110, with the selector held at Reset for at least 5 seconds. If the boiler won't relight, or E130 comes back, it needs an engineer.
E160Potterton E160: a fan fault
What it means: The fan, or its wiring, has a fault.
Possible causes, as the manual lists them:
- the fan's connections
- the power at the board's fan connector
- a jammed fan or a faulty winding
- the board
If the fan doesn't reach its speed, the manual looks at the connections, then the fan.
What you can do: nothing at home. The guide offers no reset for E160, so it needs an engineer.
E28Potterton E28: the flue sensor, or a blocked flue or condensate pipe
What it means: E28 points to different causes on different ranges:
- On the Promax and the Titanium Combi, the flue sensor, the air pressure switch, a blocked flue, a blocked condensate pipe or the wiring.
- On the Gold Combi HE and the Heatmax, the flue sensor.
Possible causes, as the manual lists them:
- the flue sensor
- the air pressure switch
- a blocked or damaged flue
- a blocked condensate trap or pipe
What you can do: Potterton's guides say to note the code and ring. In a frost, Baxi, Potterton's parent, says a frozen condensate pipe shows E28 on its own boilers. Baxi gives steps to thaw it with warm, never boiling, water where the pipe is at ground level.
E20/E50Potterton E20 and E50: the heating and hot water sensors
What it means: E20 is a fault on the heating flow sensor. E50, on a combi, is a fault on the hot water sensor, shown as E, then 50.
The manual gives the cause as the sensor itself, whose reading falls as it warms. An engineer replaces it.
What you can do: nothing at home, as Potterton's guides treat both as faulty parts.
E119Potterton E119: the water pressure has dropped below 0.5 bar
What it means: The water pressure has dropped below 0.5 bar.
Every cause of E119, and what fixes it, is on the E119 fault code page.
E125Potterton E125: the heating water isn't moving round as it should
What it means: The heating water isn't moving round as it should.
Every cause of E125, and what fixes it, is on the E125 fault code page.
E133Potterton E133: the gas supply was interrupted, or the flame didn't light
What it means: The gas supply was interrupted, or the flame didn't light.
Every cause of E133, and what fixes it, is on the E133 fault code page.
MoreEvery other Potterton code, in one list
The Promax Combi, Titanium Combi and Gold Combi installation manuals add one code to the nine in their user guides, E193. The current Titanium Heat shows its faults by flashes instead.
Promax Combi, Titanium Combi and Gold Combi (installation and service manuals 7654260-03, 2017; 7654277-02, 2016; 7654263-03, 2017)
E193A pre-circulation fault, the manuals' name for a fault in the water's circulation
What the manual lists
The chart's step for E193, shared with E125, is the engineer's. The primary circulation is checked, and anything blocking it cleared. E193 isn't among the codes the manual lets a reset clear (E110, E130 and E133).
Titanium Heat: its light, flash by flash (installation manual 7717257-02, 2020)
Green, 1 flashTemperature protection, for a flow that is too hot or warming too fast, or a flow and return too far apart
Possible causes
The circulation or the pump, the boiler's demand, the temperature setting or the sensors
Green, 2 flashesA shutdown signal, as the boiler's blocking terminals are open
Possible causes
A condensate pump wired there, or the link or wiring to an outside device
Green, 3 flashesThe flame went out while running
Possible causes
The gas supply, a prepayment meter's credit among it, then the flue
Green, 4 flashesA communication fault
Possible causes
The wiring between the boiler and its controller, or the combustion control unit
Green, 5 flashesA settings fault
Possible causes
The combustion control unit
Green, 6 flashesAnother internal fault
Possible causes
The combustion control unit
Red, 1 flashA sensor fault, or too little, no or reversed flow through the boiler
Possible causes
The sensors' connections, the pump or the circulation
Red, 2 flashesOverheat protection, as the heat exchanger's thermostat has tripped
Possible causes
No water flow, the thermostat, the board too hot or a flue fault. Then the pressure, air locks, the pump and the flue.
Red, 3 flashesAn ignition fault, from no flame, a false flame, or the flame lost again and again
Possible causes
The earth, the ignition electrode, the gas valve, the flue, the combustion settings or a blocked condensate drain
Red, 4 flashesA fan fault
Possible causes
The fan's calibration or the fan. If the fan runs, the flue, then the control unit.
Red, 5 flashesA settings fault
Possible causes
The connection to the control unit, its settings, or the unit
Red, 6 flashesAnother fault
Possible causes
Wiring inside or outside the boiler, the settings, or a communication error
The Assure and the Promax Ultra: every other code
From the Assure's and the Promax Ultra's user guides, which share Baxi's code list, with the causes from Baxi's manual for that list. Not every boiler shows every code. On the Performa 24 Eco HE and Performa System HE, the user guide's chart of lights names each fault. On the Suprima, the light patterns that name each fault are in the installation manual, for the engineer.
E09The gas valve's cable has a fault
Possible causes
The board's connections, then the board. A reset may clear it.
E15The gas valve has a fault
Possible causes
The board's connections, then the board. A reset may clear it.
E40The heating return sensor has a fault
Possible causes
The sensor or its wiring
E55The boiler needs calibrating (Ultra)
Possible causes
The guide gives no cause
E83A communication error (Assure)
Possible causes
The guide gives no cause
E103, E104, E107 and BatA Safety Assist fault, which Baxi's matching list puts down to a flat battery, a faulty board or the boards out of step
Possible causes
The user guide says to ring an engineer
E109A fault before the water starts moving
Possible causes
The circulation. E125 often follows.
E117The pressure is over 3 bar (Ultra)
Possible causes
The user guide says to ring an engineer
E128The flame went out while the boiler was running
Possible causes
The gas pressure at the valve, the valve's setting, the flame sensing electrode or its lead, or the board
E134The gas valve was open too long with no gas (Ultra)
Possible causes
The gas supply. A reset may clear it.
E135A break in the gas supply, an internal error
Possible causes
An internal fault. A reset may clear it.
E154The flow and return sensors failed a check
Possible causes
The guide gives no cause
E270The boiler fired with too little water moving
Possible causes
The guide gives no cause
E321The hot water sensor has a fault
Possible causes
The sensor or its wiring
E384A false flame
Possible causes
The board's connections, then the board. A reset may clear it.
Sources: Potterton's user guides and installation and service manuals for each range, Baxi's error code list and manual for the codes the Assure shares, and Baxi's pages on thawing a frozen condensate pipe.
Which Potterton boiler do you have, and how does it show a fault?
Potterton boilers show a fault with a code or a light, depending on the range, and a light can mean something else on another model. Potterton is part of Baxi Heating, and most Potterton boilers have been discontinued. Baxi now sells one Potterton boiler, the Titanium Heat. We still repair every Potterton, the discontinued ranges included. We'll ask for the model and what the boiler shows when you ring.
Not every light or code is a fault:
- On a Titanium Heat, orange flashes when the heating comes on are normal running. A steady green light that blinks every 7 seconds is normal too.
- Sd on a Promax Ultra or Ultra System means a service is due.
- The pump may run for a minute or two once a day to stop it sticking.
- In a frost, the boiler may fire to protect itself.
Worth knowing
Most Potterton boilers have been discontinued, and we still repair them. Baxi, which owns Potterton, now sells one Potterton boiler, the Titanium Heat, and Potterton's website leads to Baxi's.
How do you reset a Potterton boiler?
A Potterton boiler resets in its own way on each range, as its user guides show:
- Promax, Titanium Combi, Gold and Heatmax: turn the selector fully anticlockwise, against its spring, to Reset, hold it for about 5 seconds, then let go.
- Titanium Heat: hold the reset button for at least 5 seconds. It may be reset up to 5 times in an hour. A steady red light means ring an engineer.
- Assure: press the reset button for about a second. The guide says a hold of more than 2 seconds won't reset it, though its chart shows 5.
- Promax Ultra and Ultra System: press R. A code with a spanner needs an engineer.
- Performa 24 Eco HE and Performa System HE: turn the selector to Reset for at least 2 seconds.
- Suprima HE: turn the temperature knob to off until the red light goes out, then back. On a Suprima 30L to 100L, press the reset button gently, for 1 to 10 seconds.
If the code comes back after a reset, ring us.
The pressure: on the Promax, Titanium and Gold, the gauge's needle should sit in the green, 1 to 2.5 bar. Cold, it should read at least 0.5 bar. At 3 bar the relief valve opens.
The user guide shows how to top up with the filling loop under the boiler, to 1 to 2 bar. The Assure and a sealed Titanium Heat need topping up below 0.7 bar. If the boiler needs topping up often, ring us.
In a frost, the condensate pipe outside can freeze. Where the pipe is at ground level and easy to reach, Baxi's advice for its own boilers is:
- Thaw the pipe with warm, never boiling, water.
- Restart the boiler.
Sources: Potterton's user guides for each range, and Baxi's pages on thawing and preventing a frozen condensate pipe.
Is your Potterton boiler still under guarantee?
Potterton boilers are covered by Baxi's guarantee terms, and their guides send owners to Baxi to register and for repairs. The Titanium Heat has 7 years, parts and labour, when:
- it is registered within 30 days of fitting
- the Benchmark checklist is filled in
- it is serviced every year by a Gas Safe registered engineer
When they were sold, the Promax's guide gave 2 years as standard, longer through some installers. The Performa 24 Eco HE's guide gave 12 months.
While the guarantee runs, Baxi's Customer Support engineers carry out the repairs. For a Potterton boiler, ringing Potterton means ringing Baxi. Baxi doesn't pay other engineers' bills, and its terms leave out a boiler repaired or serviced with parts that aren't Baxi's genuine parts.
A boiler still under its maker's guarantee is usually repaired by the maker, at no charge, so ring Potterton first. Once the guarantee has ended, or for a fault it doesn't cover, ring us. We are an independent firm, with no connection with Potterton.
Sources: Baxi's boiler warranty terms (November 2017), its Titanium Heat page and the My Baxi portal's questions, and Potterton's user guides for the Titanium Heat, the Titanium Combi, the Assure, the Promax and the Performa 24 Eco HE.
What does a Potterton boiler service cover?
Potterton asks for a service every year by a competent person, recorded in the Benchmark service record. The manual's checklist covers:
- the flue and its seals
- the gas pressure and rate
- a combustion check with an analyser
- the condensate trap, cleaned
- the heat exchanger, cleared
- the burner and electrodes, inspected
On a Promax Ultra or Ultra System, Sd on the display means a service is due.
We service every Potterton model, and give you the rate on the call. What a boiler service includes, check by check.
Do you cover my part of London?
Yes: we travel all over Greater London, day and night, to repair Potterton boilers in every borough, north and south of the Thames. Pick your side of the river to see the areas.
North of the river
Every borough north of the Thames: Barnet and Enfield at the top, Hillingdon in the west, Havering in the east, and central London in between.
South of the river
Every borough south of the Thames: Richmond and Kingston in the west, Bexley in the east, and down through Croydon to Sutton and Bromley.
The other makes we repair
Every main make, combi, system and regular. Pick yours for its common faults, its codes and how we repair it.
Questions about Potterton boilers
Do I need to know what's wrong with my Potterton boiler before I ring?
No. Ring and say what the boiler is doing, or what you can see or hear, and we'll ask the rest. Finding the fault is the engineer's job.
Do you charge more in the evening or at weekends?
Yes. Our rates are higher in the evening, overnight and at weekends.
Can you repair an older Potterton boiler?
Usually, yes. It depends on the boiler's condition and whether its parts are still made. We'll ask for the model when you ring.
Is my Potterton boiler worth repairing?
Often, yes. Age alone doesn't decide it. What decides it is the rate for the repair against a new boiler, and how often the boiler has failed. The engineer gives you the rate for the repair, and the choice is yours. When a new boiler makes more sense.
Will a repair affect my Potterton guarantee?
While the guarantee runs, ring Potterton first. The maker usually repairs a boiler under guarantee itself, and its terms say who may work on it. Once it has ended, any Gas Safe registered engineer can repair it.
Do you fit Potterton's own parts?
Yes, the maker's own parts wherever they are available. Each repair is guaranteed for 12 months, covering the parts we fit, the labour and any return visit.
How much does a Potterton boiler repair cost?
The cost of a repair depends on the part, how long the job takes and when it's done. The rate is agreed in writing before the repair starts. How our rates work.
Why is my Potterton boiler flashing a green light?
What a flashing green light means on a Potterton depends on the boiler. On a Titanium Heat, it is a warning that the boiler has found a problem and is trying to restart. On a Suprima 30L to 100L, a green light flashing on its own is normal running. With a red light flashing too, it means a fault. On a Gold Combi, with SF on the screen, it is an engineer's test mode. We'll ask which boiler you have and how many flashes when you ring.
Why does my Potterton boiler keep losing pressure?
Needing to top up often means a leak or a fault, Potterton's guides say. Low pressure shows as E119 on the Promax, Titanium and Gold, and E118 on the Assure and Ultra. Ring us, and we'll ask what the gauge reads.
Why does my Potterton display show E1 and then a number?
E1 and then a number is a three-figure code shown in two parts. E1, then 33, is E133, and E1, then 25, is E125. What E133 means on every make.
Have Potterton boilers been discontinued?
Most Potterton boilers have been discontinued. Baxi, which owns Potterton, now sells one Potterton boiler, the Titanium Heat, and Potterton's website leads to Baxi's. A discontinued Potterton can still be repaired, and we repair them across London. We'll ask the model and what the display or light shows when you ring.
Who makes Potterton boilers?
Baxi Heating UK makes Potterton boilers, and Potterton is one of its trading divisions. Baxi is part of the BDR Thermea Group. Potterton's website now leads to Baxi's, where the Titanium Heat is sold. Baxi boilers: their codes and repairs.
Don't know what has failed? You don't have to.Ring and say what you can see or hear. Finding the fault is our job.
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A real person answers and gives you the rate on the call. No work starts until you say yes, and repairs are guaranteed for 12 months: parts, labour and any return visit.
