Error E119

Safety precautions:

- Turn the boiler off and isolate electrical power at the switch or programmer before starting. Allow the boiler and system to cool to avoid scalding from hot water/steam.

- Never tamper with internal gas or sealed components. Only use the external filling loop or Easy-Fill valve to add water.

- If you smell gas or suspect a gas leak, leave the property immediately and call your gas emergency number.

Initial checks a homeowner can do:

1) Look at the pressure gauge on the boiler display. If it reads below about 1.0 bar (often in the red), the E119 low-pressure fault is confirmed.

2) Check for visible leaks around the boiler, pipework, radiators, and valves. Look for wet patches, drips or damp floors/walls.

3) Check radiators you recently bled — bleeding can reduce system pressure.

4) If your boiler has the Baxi Easy-Fill green lever or an accessible filling loop (flexible silver hose and two valves), identify it under the boiler. If you don’t see a filling loop, check the manual or consult an engineer.

Step-by-step diagnostic and fix (repressurise):

1) Make sure the boiler is off and cooled. Locate the filling loop or Easy-Fill lever under the boiler. If there is a removable flexible hose (filling loop) it may have small end caps—remove them.

2) If you have the Easy-Fill green lever: press and hold the lever to allow mains water into the system while watching the pressure gauge. Release the lever when the gauge reaches roughly 1.0–1.5 bar (some recommend 1.0–1.5 cold; avoid exceeding the boiler’s green zone or 2.5 bar).

3) If you have a manual filling loop with two valves: open one valve slowly, then open the second valve slowly until you hear or see water flow. Watch the pressure gauge and stop when the gauge reaches about 1.0–1.5 bar (or the top of the green area). Close both valves fully and replace end caps.

4) Do not over-pressurise. If pressure goes above about 2–2.5 bar, close the valves and bleed a radiator to reduce pressure down to the correct range.

5) After topping up, restore power and call for heating/hot water. The E119 error often clears automatically; if not, consult the boiler manual for reset instructions or switch the boiler power off and on. Do not repeatedly reset the boiler without fixing the root cause.

Further diagnostic checks if the fault returns or filling loop won’t fill:

- Re-check for leaks: a persistent drop in pressure usually means a leak or a faulty component (PRV, joints, radiators, valves).

- Listen when opening the filling loop: if you don’t hear water flow from the mains, the filling loop, mains supply valve or isolation valve may be closed or blocked—check household stopcock and filling loop connections.

- If pressure fluctuates widely when heating starts, the expansion vessel or its pre-charge may be faulty and needs a gas-safe engineer to test/replace.

- If the pressure gauge looks damaged or inconsistent with actual system behaviour, the gauge or pressure sensor may be faulty and should be checked by an engineer.

When to call a professional:

- If pressure will not rise when using the filling loop, or you cannot locate or safely operate the loop.

- If pressure keeps dropping after topping up, or you find a leak, or you suspect the expansion vessel or PRV is faulty.

- If you smell gas or have any gas safety concerns.

- Any repairs beyond topping up (replacing valves, expansion vessel, boiler internal work) must be done by a Gas Safe registered heating engineer.

Post-fix checks and monitoring:

- Check pressures again after the heating has run and when cold. Note any steady fall over days or weeks.

- Check radiators for cold spots and visible leaks.

- If the E119 returns regularly, book a service with a qualified engineer to find and fix the underlying fault rather than repeatedly topping up.

If unsure at any point, stop and call a Gas Safe registered engineer. Safety first.