Error CE 207

Safety precautions:

1) Before you begin, turn the boiler mode to OFF and, if possible, switch off the boiler electrics at the fused spur or switch. Do not remove the boiler casing or attempt internal repairs. Place towels under the boiler to catch any drips.

2) Only work on external filling loops or the approved internal filling key/lever provided with the boiler. Never force or modify valves or hoses.

Initial checks a homeowner can do:

1) Check the pressure gauge on the boiler. If it is below 1.0 bar (often in the red) that confirms low pressure. Note the current level.

2) Visually inspect visible pipework, radiators, radiator valves and the area under the boiler for signs of damp, corrosion, or a leak.

3) Check the pressure relief/overflow discharge pipe (usually runs to an outside wall). If it is wet or dripping, the PRV may be discharging and needs an engineer.

4) If you have recently bled radiators, this commonly causes pressure loss — re-pressurise after bleeding.

How to re-pressurise (common methods depending on filling loop type):

Important: only allow mains cold water in until the gauge reads between 1.0 and 1.5 bar. Do not exceed 1.5 bar.

A) External filling loop (silver braided hose with two small valves under the boiler):

1) Turn the boiler OFF.

2) Slowly open the first valve (turn anticlockwise) and then the second so water can enter the heating circuit. Open slowly and listen for water flow.

3) Watch the pressure gauge and stop when it reaches about 1.0–1.5 bar.

4) Close both valves tightly and remove or stow the filling loop if it is removable. Wipe away any drips.

B) Internal filling key type:

1) Turn the boiler OFF and remove the cover flap under the boiler to find the white key.

2) Insert the key into the filling link, follow the manufacturer action (often turn key anticlockwise to engage then turn a small square to admit mains water).

3) Allow pressure to rise to 1.0–1.5 bar, then turn the square back and remove the key. Dry and stow the key.

C) Keyless internal filling lever (blue lever):

1) Turn the boiler OFF.

2) Pull down the blue lever to admit mains water, watch the gauge until 1.0–1.5 bar, then release the lever.

After re-pressurising:

1) Wipe up any water and ensure all valves are closed. Restore power to the boiler and set it to the required mode.

2) If the boiler shows the CE 207 or is locked out, perform a single reset using the boiler’s reset procedure (refer to the user manual). Do not repeatedly reset without fixing the underlying cause.

3) Turn the heating on and check that the pressure rises a little when the system heats. Monitor the pressure over the next 24–48 hours for any drops.

Further diagnostic steps if pressure falls again or other signs appear:

1) Re-check for visible leaks at radiators, pipe joints and beneath the boiler. Even small weeps can cause pressure loss over days.

2) Check the PRV discharge pipe and terminations outside. If wet or continuously dripping the PRV or expansion vessel may be faulty.

3) If radiators have been bled recently and pressure repeatedly falls, look for incorrectly closed isolation valves or faulty radiator valves.

4) If you cannot find an external leak and pressure keeps falling, do NOT attempt internal components; call a Gas Safe registered engineer or Worcester-accredited installer. A professional will check for internal leaks, a failed expansion vessel, PRV faults, pump issues or other sealed-system failures.

When to call a professional immediately:

1) You find any active leak or water under the boiler, damp patches on walls/floors or continuous discharge from the PRV.

2) Pressure keeps dropping after you re-pressurise.

3) You are unsure where the filling loop/key is or are uncomfortable performing the task.

4) The boiler displays additional fault codes after repressurising, or the unit will not reset and run normally.

Important warnings:

- Never exceed the recommended pressure (usually 1.0–1.5 bar for Worcester). Over-pressurising can damage seals and cause leaks.

- Do not tamper with internal boiler components or electrics beyond turning the unit off and on. Internal repairs must be carried out by a Gas Safe engineer.

- If in doubt, contact a Gas Safe registered engineer or Worcester-accredited installer for safe inspection and repair.