No Hot Water Diagnostic and Diverter Valve Repair, St Albans

A homeowner in St Albans was frustrated with a boiler that seemed to be working fine for the heating, but wouldn't deliver a drop of hot water to the taps. Ralf attended to run a full diagnostic and get to the root cause rather than guess at a fix.

Tracing the fault

The diagnostic tools quickly pointed to a sticking diverter valve — a common issue that Ralf carries replacement parts for on the van. The diverter valve is what switches a combi boiler between heating the radiators and heating water for the taps; when it sticks, the heating side can keep working perfectly normally while hot water stops reaching the taps entirely, which is exactly what confused the homeowner before Ralf's visit.

With the fault identified, the component was replaced and the boiler serviced at the same time to ensure long-term reliability rather than just fixing the immediate symptom.

Don't settle for cold taps

A boiler that heats the house but not the water is still a boiler with a real fault, not something to live with. It's a quick diagnosis for an engineer who knows what to check first, and usually a same-visit repair once the part is confirmed.

Serving St Albans and Hertfordshire

Pristine Gas Ltd covers St Albans AL1 and the surrounding Hertfordshire area for boiler fault-finding and repair — see our St Albans AL1 area page for full details. Call 07472 251465 if your heating works but your hot water doesn't, or vice versa.