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Updated 06 June 2017   Lovekin Ltd 2009-2017    registered in England & Wales No.3950749    Little Courshay  EX13 5XF

Link to Central Heating Problems and Gas Boiler Problems home page

heating and boiler problems  –  lovekin.net

Gas Boiler Faults, Problems and Fault Finding, and One or Two Gas Fire Faults Too

We’ve tried to keep these links in alphabetical order by manufacturer, and in alphabetical order within manufacturer categories too.

The links should take you to the correct web page or part of a page. If any of the links don’t work, please email us. Thanks.



General boiler faults:


Boiler pressure and expansion vessel problems – sealed system pressure problems

Big changes in central heating system pressure? or combi boiler pressure dropping? Faulty expansion vessel in a system boiler?


Condensate pipe problems? E133, EA, D5 error or fault codes

Frozen condensate pipes continue to cause problems in cold winters


Plate heat exchanger problems – secondary heat exchangers

A blocked plate heat exchangers is one of the commonest causes of trouble with combi boilers



Specific boiler faults:


Baxi 100 HE Boiler locking out intermittently

This fault also occurs with the earlier Baxi Barcelona boiler


Baxi Solo 2 50 PF Boiler won't light

This fault can occur with any Baxi Solo PF boiler


Baxi Solo 2 80 PF Boiler runs only intermittently

This was a fault with the external wiring, after the boiler had been moved, not a fault with the boiler


Baxi Solo 350 PFL Boiler, Pump runs on indefinitely

This fault can occur with any Baxi Solo PF boiler  read more


Baxi Solo 3 60 PF Boiler main burner won't light but a pilot is present

This fault can occur with any Baxi Solo PF boiler


Baxi Bermuda 551 Back Boiler. Roaring noise caused by rusted burner

This fault was caused by a badly rusted burner


Baxi Bermuda 552 Back Boiler Fault. Pilot holds but gas valve locks out a few seconds after the main burner opens

This is a fault which can occur with most older back boilers


Baxi Bermuda 552 Back Boiler. Roaring noise caused by faulty Honeywell V4600C gas valve

This fault can occur with most older boilers


Glow-worm Micron 30FF failed with both lights flashing alternately

This fault also applies to Micron 40FF, Micron 50FF, Micron 60FF, Micron 70FF and Micron 80FF

The article explains some of the terms like “Blocking Error” used by Glow-worm in the Micron FF manuals


Glow-worm Ultracom hxi showing F1 fault code

This fault also occurs with the British Gas BG 330 boiler which is based on the Ultracom hxi


Ideal E Type RS80N Boiler Fault

Customer reported boiler not functioning


Ideal Isar HE24 Combi Boiler Fault

Customer reported problems with insufficiently hot tap water


Potterton Prima 80F Boiler With Multiple Faults

For more than a year this boiler had been slow to complete the ignition cycle and fire up

This Prima F boiler had a fan fault, a PCB fault and a fault with the air pressure switch


Potterton Profile 50e Fault

Boiler fan cycles on and off repeatedly before eventually allowing boiler to fire up


Potterton Puma 80e Combi Boiler Fault

Customer reported that boiler was locking out and boiler pressure kept dropping

These faults apply to all the Potterton Puma combination boilers, the Puma 80, 80e, 100 and 100e


Potterton Suprima 30 Boiler Fault

Boiler shuts down after 15 minutes, then "dead" for hours with no lights before working again


Potterton Suprima 40 Boiler Fault

Potterton Suprima boiler shuts down during ignition; flashes red 3 times per second (Siemens pcb)

This fault applies to all Suprima boilers with the newer Siemens circuit board fitted


Potterton Suprima 60 Boiler Fault

Customer reported ignition fault, problems with lighting

This fault applies to all early Potterton Suprima boilers from the Suprima 30 to the Suprima 100


Potterton Suprima 60L Boiler Locks Out on Start Up

Potterton Suprima, solid red lockout light (Siemens pcb).  Reset was held in for 10 seconds, diagnostic light then flashed red 3 times per second


Potterton Suprima 80 Boiler Fault

Customer reported Potterton Suprima boiler repeatedly locking out, then would not reset

This fault applies to all early Potterton Suprima boilers from the Suprima 30 to the Suprima 100


Potterton Suprima boiler with newer Siemens pcb locked out; very slow red flash, 3 seconds on, 1 second off

This Suprima newer style Siemens PCB was showing an unusual, very slow red flash which we hadn’t seen


Potterton Suprima new Siemens PCB fault

Details of this fault were sent to us by A.R.  We’ve published the text of his email.

This Siemens circuit board is fitted to all later Potterton Suprima boilers and is the standard replacement part


Robinson Willey Firegem Visa 2 Gas Fire Fault

Customer reported Firegem Visa 2 gas fire shutting down and locking pilot out soon after lighting


Vokera Mynute 14SE Boiler

Customer reported boiler not firing consistently and making strange noises


Worcester 28i Junior Combination Boiler

Boiler not firing for hot water after repair work to street water main