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Problem Guides

No Hot Water

Boiler, immersion heater, or hot water cylinder issues

2 free DIY guides · 6 total

Step 1 — What type of system do you have?

The diagnosis is different depending on your system — this helps us point you to the right guide.

All guides
Combi boiler producing no hot water
Combi boiler — hot water at taps has stopped· 5–10 min
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Hot water runs cold after a few minutes
Starts hot then goes cold mid-shower· 5 min
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Immersion heater not heating waterFree
Electric hot water cylinder not working· 15–45 min
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No hot water after a power cutFree
Boiler needs resetting after power restored· 5–10 min
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No hot water but heating is working fine
Radiators heat up but taps run cold· 5–10 min
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Vented system — boiler on but no hot water
System or conventional boiler with hot water cylinder not heating· 20 min–2 hrs
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