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Problem Guides

No Heating

Radiators not heating, boiler faults, thermostat issues

3 free DIY guides · 5 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
Boiler keeps switching itself off
Boiler fires up then cuts out after a few minutes· 5–10 min
›
Boiler programmer or timer not workingFree
Heating won't come on at scheduled times· 20–45 min
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Radiators are cold but boiler is firingFree
Boiler seems to be running but rooms stay cold· 20–60 min
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Room thermostat not workingFree
Thermostat doesn't seem to be controlling the heating· 20 min–2 hrs
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Zone valve stuck or not opening
Heating or hot water zone not responding· 5 min
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