Hot-water fault
No hot water? Same-day boiler repair in Bath
Heating still works but hot water is cold? Nine times out of ten it's a stuck diverter valve or a DHW flow-turbine sensor. Both are diagnosable in under twenty minutes if you know the boiler.
For: Bath homeowners with heating but no hot water
How we diagnose
Fault codes first, then a manual DHW test at the tap, then combustion and flow-turbine electrics. We tell you the actual failed component before we tell you the price — no vague 'boiler needs a service' after a house call.
Common no-hot-water causes we see
- Seized or debris-blocked diverter valve
- Failed DHW flow-turbine sensor
- Faulty domestic hot-water NTC thermistor
- PCB relay stuck in central-heating mode
- Scaled plate heat exchanger (Bath hard water)
Frequently asked
- How fast can you get to me?
- In Bath, usually same day if you call before midday. Evenings and weekends are subject to available slots.
- Is it worth repairing?
- If the boiler is under 8 years old, almost always. If it's older or on its second major fault, we'll be honest and price a replacement alongside.
- Do you carry parts?
- Diverter cartridges, DHW sensors, thermistors, PRVs and expansion vessels — yes. Rare Worcester PCBs sometimes need a next-day return visit.
Call us now
One phone call, one honest diagnosis, one fixed price. We aim to fix on the first visit or quote a swap on the spot.
Related solutions
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Further reading
Worcester Bosch Accredited · 10 Year Guarantee*
New Worcester boiler with a 10 year guarantee*
Free no-obligation quotes for installation, servicing & repairs across BA & BS postcodes.