Worcester heatslave 18/25 combi boiler too hot Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[dandies]

Hi, Worcester heatslave 18/25 combi oil boiler is heating the water too hot, same problem last year ,engineer changed thermostat in the boiler at that time, why would it happen again so soon,boiler is 16 years old, thanks

[stoneyboy]

Hi dandies,
Failure of the thermostat is the most likely problem. If you didn’t last time can only suggest that you use an approved Worcester Bosch engineer to identify the problem and fix it this time round.
Regards S