Heating works but no hot water in Oldbury? Usually a diverter valve or a scaled exchanger, not a new boiler. Langley, Warley, Rowley Regis and Bristnall Fields.
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This is the part that chooses between radiators and taps. When it sticks, it sticks the way you have just described. The valve or cartridge is done in a visit.
If there is a cylinder in the airing cupboard, look at the valve on the pipework above it and its thermostat before anybody touches the boiler.
South Staffs water is hard. Scale collects in a combi plate exchanger until hot water runs lukewarm and then cold. That is a flush or an exchanger, not a boiler.
The fault is confirmed on the appliance. You get told the part and the price before any work starts.
A diverter valve is normally one visit of one to two hours. A scaled exchanger flush takes longer. Parts for common boilers are usually on the van or arrive next day.
A photo of the boiler and the display. Say whether you have a cylinder in the airing cupboard. Tell us if the water goes warm for a moment before it goes cold.
Warm radiators and cold taps is a specific fault with a short list of causes. A new boiler is not on it.
On a combi, the diverter valve has stuck towards the heating side. On the older cylinder systems still in plenty of Oldbury houses, it is the motorised valve or the cylinder thermostat. Either way it is a part, not a replacement.
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Learn more →Age matters for whether a repair is worth it. It does not decide what has failed. A diverter valve on a twelve-year-old boiler is still a diverter valve, and still cheaper than a replacement.
That is the scale version rather than the valve version. The exchanger cannot keep up. It is very common on hard water, and often fixable without replacing the part.
Ask for the Gas Safe ID card and turn it over. The back lists the appliance types that person is signed off for. It should include the one in your house.
The failed part and the access. A valve is simpler than an exchanger. The engineer confirms the cause first, then explains the job and the cost.
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