No heating or hot water
Diagnosis for boilers that have stopped producing heat, hot water or both.
Boiler repairs · Aberdare & South Wales
Clear fault finding for boiler problems.
Practical boiler repair support from Gas Safe engineers serving Aberdare, Rhondda Cynon Taf and nearby South Wales communities.
Gas Safe registeredQualified local engineers.
25 years’ experienceFamily-run South Wales expertise.
Clear quotationsPractical advice, no pressure.
Boiler fault diagnosis
Find the cause before deciding the repair.
Loss of heating or hot water can have several causes, from controls and pressure issues to components inside the boiler. A useful repair begins with careful diagnosis rather than guessing at parts.
SGW asks about the symptoms, fault code and recent behaviour of the system, then explains the findings and available options. If a boiler is no longer economical to repair, we can also provide balanced replacement advice.
Fault codes and lockouts
Investigation of recurring error codes, reset problems and unexplained shutdowns.
Pressure and circulation issues
Checks where pressure falls, radiators stay cool or circulation appears inconsistent.
Repair-or-replace advice
A clear explanation when age, condition or likely repair cost makes replacement worth considering.
Useful information
Help us understand the fault.
A few details can make the first conversation more useful and help us arrange the right type of visit.
- Boiler make and model
- Any fault code on the display
- Whether heating, hot water or both are affected
- When the issue started and whether it is intermittent
- Clear photos of the boiler and controls
Common questions
Boiler repair questions
Should I keep resetting my boiler?
Repeated resets can hide a developing problem. If the boiler continues to lock out, arrange professional diagnosis.
Can a fault code confirm the repair price?
A fault code helps but does not always identify the full cause. The boiler and system may need checking before a reliable quotation.
What if the boiler is old?
We consider condition, parts availability, repair cost and your household needs before discussing repair or replacement.
Get practical help with a boiler fault.
Describe the problem and upload photos for a clearer first response.