DIY Doctor UK DIY Forums

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

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