A homeowner calls an engineer, thinking the boiler is broken because they’re not feeling any heat and their radiators are cold. The engineer goes round, carries out his diagnostic process, and reports back that, yes, the boiler seems to be working perfectly well, but the problem lies elsewhere.
Why does this happen so often, more than people might think?
A boiler doesn’t do its job in isolation. It’s one component of a heating system, along with radiators, pipework, a pump, valves, a thermostat, and so on. Each of these controls, aids, or otherwise affects the warmth we feel. And if any link in that chain fails, the boiler is not at fault – even if, symptomatically, it looks the same as if the boiler itself had packed up. The result, of course, is the same: there’s no heat.
If the thermostat is the most common culprit, this is often because it’s stuck or miscalibrated, or the batteries have gone out, or any other fault that prevents it from sending the signal to the boiler to fire up and start working. The boiler will continue to sit there, doing nothing, waiting to be told to start working, but never being told. All it takes to get your perfectly healthy boiler working again is to replace that forty-pound bit of plastic.
A pump that fails – which, crucially, causes the system to stop working and circulating hot water through the system at all – will also give symptoms that seem to point to the boiler: the boiler’s working, but there’s no heat coming through the radiators and pipework. Result: looks the same as if your boiler wasn’t heating.
Trapped air in the system or radiators that need bleeding will also give rooms a cold that they shouldn’t have (because they’re not getting heat normally). That’s a pattern that often gets blamed on the boiler – until you investigate further. For Boiler Service Cheltenham, visit https://www.hprservicesltd.com/cheltenham-boilers/boiler-service-cheltenham/
With this new knowledge of how these systems work and how easily a fault can be masked by a failure in one of the other components, your response to a breakdown might be totally different. Don’t assume it’s the worst and you need to replace your boiler. Go round and carry out a proper diagnostic process to find out if it’s the whole system that’s broken down or just your boiler in isolation.
Even then, though, it’s tempting to blame the boiler. It’s the largest, the most visible, the most expensive-looking component in your house.