BoilerFaultCodesYour boiler has stopped because water isn't moving through the system quickly enough, causing it to overheat too rapidly.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: No flow (flow/return dt > 45K)
What causes this fault?
This fault occurs when the boiler detects that water is heating up far too quickly because it isn't circulating through the pipes as it should. The most common reasons are a failed pump that can no longer push water around or a significant blockage within the internal pipework that is restricting flow.
This issue is frequently seen at the start of autumn when heating systems are turned back on after sitting idle all summer, which can cause internal pump parts to seize.
DIY fix possible
Check that your home's radiator valves are open.Ensure the external system valves are turned to the open position.Verify that the boiler pressure is between 1.0 and 1.5 bar on the gauge.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like E14 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Remeha Quinta 115 is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
Affiliate links — we may earn a commission at no extra cost to you.