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Get a Potterton Assure installed from just £2232 
or £24.50 per month with NO deposit.

A representative example of 5.9% APR over 120 months with no deposit:

Cash Price Deposit Total loan amount Term of loan Monthly cost Total charge for credit Total amount repayable Representative APR
£2,232 £0 £2,232 120 £24.50 £707.55 £2939.55 5.9%

Why choose the Potterton Assure?

With every purchase of a Potterton boiler, we offer a free 5 year manufacturer backed warranty on all parts, labour and call-outs. 

Potterton Assure heat only and warranty Erik31he with guarantee and warranty features affordable high quality 31kw combi boiler
  • 19-25kW Heat Only Boiler
  • 5-year warranty
  • Ideal for medium-sized homes
  • A-Rated Energy Efficient
  • Comes with a free smart thermostat - Honeywell Lyric T6R 
  • Compact size: H 625mm x W 370mm x D 270mm
  • Backlit LED display with easy to use controls
  • Whisper quiet in operation, perfect for living areas
  • Lightweight to aid installation
  • No pump overrun or permanent live required – saves time and money on installation
  • Front and side access to all components – easy to repair and service
  • Provides maximum energy efficiency – reduce fuel bills and carbon emissions

Why get your boiler with us?

Qualified engineers

All of our local engineers are Gas Safe Registered - they'll do a quality job and answer any questions you might have.

Easy to book

Call us, chat online or book a survey. Whatever you prefer doing is good for us - we've got you covered.  

Fixed price quote

Our prices are simple and easy to understand - we offer a fixed price quote after every survey, so you know exactly how much an install will cost. 

Fast response

We understand when you're in need of a boiler you don't want to wait - we can be with you within 48 hours for a boiler installation.

Compact fit potterton assure heat only boiler

Compact fit

A compact boiler that's incredibly powerful - the Potterton Assure range can fit discreetly into a standard kitchen cupboard.

A-rated Energy Efficient heat only boiler

A-rated Energy Efficient

As an A-rated energy efficient boiler, the Potterton Assure can potentially save you on your annual heating bills and carbon emissions.

Whisper-quiet operation Potterton Assure Heat Only

Whisper-quiet operation

Our Potterton Assure range is incredibly quiet while running, with a sound level output of just 37 decibels (dB) - a conversation is usually 60dB.

Free 5 year warranty

We offer a free 5-year warranty with every purchase of a Potterton Assure Heat Only boiler- this covers you for all labour, call-outs and parts and our dedicated customer services team are here to support you.

 Just one call to us and we’ll make sure your boiler is up and running again as quickly as possible

Potterton Assure Error Codes

Error Code

Possible fault

E09  Gas valve connection cable
E10  External probe fault
E12  Differential water flow switch fault (still open)
E13  Differential water flow switch fault (still closed)
E15  Gas valve command fault
E20  Central heating NTC fault
E28  Flue NTC fault
E40  Central heating return NTC fault
E50  DHW NTC sensor fault (tank boiler) (s.c.) OR DHW NTC sensor fault (tank boiler) (o.c.)
 No communication
E109  Pre-circulation fault
E110  i) Boiler max temperature exceeded for gradient (probable pump jammed or air in the
circuit). OR ii) Boiler max temperature exceeded for overtemperature (probable pump jammed or
air in the circuit). OR iii) Safety thermostat sensor tripped
E118  Primary system water pressure too low (< 0.5="">
E125  Circulation fault (primary)
E128  Frequent flame failure (12 times)
E129  Safety error for frequent loss of flame with max correction during the ignition during Calibration Function


 Flue thermostat sensor tripped (lockout)
E133  Condensate pipe may be frozen. You can easily fix this issue with our handy frozen condensate guide.
E134  Elapsed time gas valve open without gas
(short request in a short period)
E135  Interruption of gas supply (internal error)
E154  Flow/return sensor temperature test


 Fan or fan wiring fault
E163  Domestic Hot Water NTC sensor fault (s.c.) OR Domestic Hot Water NTC sensor fault (o.c.)
E270  Circulation fault (dry fire)
E317  Wrong power supply electrical frequency (Hz)
E321  Hot water NTC fault


 False flame
E385  Under voltage
E430  Water pressure temporary test
E430 + Flame 'crossed'  Water pressure test failed


Cosy up with a better boiler company

We are completely transparent – no bull, no waffle, no confusion.

Don’t hesitate to give us a call on 0800 61 22 302 or get an online quote today