If your Worcester boiler is flashing E119 (sometimes shown as a wrench icon plus E119), your central heating system has lost pressure. The boiler has shut itself off to prevent damage. This isn't dangerous — it's exactly what should happen — but you'll have no heating or hot water until you correct the pressure.
This guide walks through the fix, when to call an engineer, and what's actually going on under the bonnet.
The 60-second fix
Most E119 faults are fixed in three minutes:
- Find your filling loop. It's a silver flexible hose underneath the boiler with a small valve on each end. On combi models it's usually on the right; on system boilers it can be on a pipe nearby rather than the boiler itself.
- Open both valves slowly. A quarter-turn each. You'll hear water trickling — that's mains water entering the heating circuit.
- Watch the pressure gauge. Close both valves the moment the needle reaches 1.5 bar. Don't overshoot — going above 3 bar opens the pressure relief valve and you'll have a slow drip outside until that reseats.
- Press the reset button on the front of the boiler. Hold for three seconds. The display should clear and the boiler will fire.
That's it. If pressure holds and the boiler runs normally, you're done.
What if it keeps happening?
If E119 reappears within a few days of repressurising, the system is losing water somewhere. Repressurising over and over is not a fix — you'll eventually push too much water in and trigger a different fault.
The two usual suspects:
1. A leak in the heating system
Check:
- Every radiator valve. Pay particular attention to under-floor pipework if you have any — small drips can run for months unnoticed.
- The pressure relief discharge pipe (the small copper pipe that pokes out of an exterior wall, usually behind the boiler). If you see water dripping or staining underneath it, the PRV has lifted and the system is venting overpressure — call an engineer.
- Floors and ceilings under bathrooms, kitchens, and bedrooms above the boiler. A wet patch or stain points at hidden pipework.
2. A failed expansion vessel
Every sealed central heating system has an expansion vessel — a steel can with a rubber diaphragm and air on one side. As water heats up and expands, the diaphragm absorbs the extra volume so pressure stays steady.
When the vessel's air charge leaks out (which it does, slowly, over a boiler's lifetime), the system loses pressure every time it cools. Symptoms:
- Pressure rises sharply when the boiler is hot, then drops below 1 bar when it's cold.
- Repressurising "works" for a day or two, then E119 returns.
- You're fine for months in summer when the heating is off.
Recharging or replacing the expansion vessel is a 30-90 minute engineer job. It's not safe to attempt yourself — the vessel is pressurised and incorrect recharging damages the diaphragm permanently.
Why "just keep topping it up" is a bad idea
It's tempting to leave the filling loop slightly open or to repressurise every other day. Don't:
- Repressurising adds mains water to the heating circuit every time. Mains water is full of dissolved oxygen and minerals that corrode the heat exchanger and accelerate sludge build-up. A leak that's costing you a litre a week becomes a £2,000 boiler replacement five years earlier than it should be.
- You can over-pressurise. Above 3 bar the pressure relief valve lifts. Once it's lifted, it often doesn't reseat perfectly, so you have a permanent slow drip outside — and the system loses pressure faster.
- You're masking the leak that's the actual problem.
If E119 comes back within a week of correctly repressurising, get an engineer to find the leak or the failed expansion vessel.
When to call an engineer
Book a visit if:
- You can't find the filling loop or it's missing entirely (sometimes removed during boiler service work — needs replacing).
- The pressure gauge reads zero and won't lift when you open the loop.
- Pressure climbs but won't hold — drops below 1 bar within hours.
- You see water anywhere near the boiler, on pipework, or staining a ceiling.
- The PRV discharge pipe outside is dripping or stained.
How HomeAssure handles E119
If you're on a HomeAssure Boiler Care plan, our chat agent can walk you through the filling-loop fix in about three minutes — exactly the steps above. If pressure doesn't hold, we book a Gas Safe engineer within 24 hours. The repair is included; you pay the callout fee you chose at sign-up (£0, £60, £99, or £139), and that's it.
If you're not on a plan yet, the same engineer will still come out — it's a pay-as-you-go callout instead of a flat monthly fee.
Either way, an E119 fault is one of the easier ones to get fixed, and it shouldn't take more than a couple of hours from your first call to the heating running again.