My sister struggled with her old boiler before she found a lasting solution; Every time I would visit her in winter, she would attempt to switch it on only to fail… When her eldest son tried it, the boiler would take too long to turn on! This had been going on for a while! Having a background in HVAC systems, I knew that this was a problem; Under normal circumstances, the boiler should turn on immediately when it is switched on, and my sister’s boiler was taking too long to heat her space, indicating something off.
My first suspicion was that the circuit breaker was always off every time they tried to switch on the boiler.
However, one look at the breaker box confirmed that everything was alright in there. My second guess was to check the control unit. There was a high probability that it was malfunctioning and the settings were too low, but it turns out that I was right. The control unit setting was too low, and the boiler was struggling to kick in immediately since it registered the low rapidly changing temperatures. I adjusted the control unit set to a higher temperature, and it was easier for them to beginning the boiler now. However, I noticed that the control unit was not the best for their furnace and advocated on an update. I also asked my sister to keep an eye on the fuel levels, always check the pilot light and ignition for faults, and consider jammed filters, besides the control unit, a boiler is likely to fail when it is jammed, or the other elements are faulty; A easy annual finetune session can maintenance such troubles..