No Heating or Hot Water
Both the central heating and hot water have stopped working completely, often during cold weather.
What Is Causing This?
- 1Boiler fault such as a failed pump, PCB, or diverter valve
- 2Frozen condensate pipe preventing the boiler from firing
- 3Thermostat fault not sending a signal to the boiler
How Urgent Is This?
This needs prompt attention. Delaying could cause further damage, safety risks, or significantly higher repair costs.
What Needs to Be Done
A Gas Safe engineer will diagnose whether the issue is the boiler, thermostat, programmer, or external pipework, and carry out the necessary repair or part replacement.
How Much Will It Cost?
National average estimate
Labour: £85 – £200 | Materials: £30 – £178
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Prices are estimates based on typical UK rates. Actual costs depend on the specific issue, accessibility, and your location. All quotes from tradespeople on Tradesfolk are completely free.
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Ask a QuestionHow to Prevent This
Have your boiler serviced every year before winter. Lag external pipes to prevent freezing. Set the heating to come on briefly even when away during cold spells.
Related Problems
The boiler shows an error code, flashes a warning light, or simply will not ignite when heating or hot water is called for.
Hot water taps run cold or lukewarm despite the boiler or immersion heater being switched on.
The room thermostat does not respond, displays incorrectly, or the heating does not follow the set temperature.
Other Gas Engineer Problems
Loud banging, kettling, or rumbling sounds coming from the boiler, particularly when the heating or hot water comes on.
The boiler pilot light repeatedly extinguishes, meaning the boiler will not fire up for heating or hot water.
A smell of gas (rotten eggs) inside the house, which could indicate a gas leak.
The boiler pressure gauge keeps falling below 1 bar, causing the boiler to lock out or lose heating efficiency.