We have a Worcester 18/25 oil combi boiler and have it serviced annually. It's about 5 years old. We leave the digital thermostat set at 15 or so and, of course, while the air temperature is higher than that, the heating doesn't come on. Last night we were sweltering in 30 degrees. I went into the bathroom and was shocked to find that the radiator was red hot! The one in the passage nearby, which is always the first to fire up, was the same. None of the other radiators in the house felt warm.
Any ideas why this happened please? I have turned the heating off completely for now but need to know what the fault is. Thanks.
Any ideas why this happened please? I have turned the heating off completely for now but need to know what the fault is. Thanks.