Error 360

Safety precautions:

1. Before touching the boiler controls or casing, turn the boiler off using the front panel controls and isolate the electrical supply at the fused spur or the consumer unit. Do not work on or attempt to alter any gas pipework or gas-carrying components. If any work inside the gas-containing areas is needed, call a Gas Safe registered engineer.

2. Allow the boiler to sit for a few minutes after power-off to reduce risk of live components and hot surfaces. Wear eye protection and be cautious of sharp edges when removing the casing.

3. If you are not comfortable opening the boiler casing or working with electrical connections, stop and call a qualified engineer.

Initial homeowner checks (safe, simple checks you can do):

1. Record the exact fault: note the displayed code (360) and any additional cause code shown in the info menu (press the spanner/return button to view cause codes). Take a clear photo of the display for an engineer.

2. Try a controlled reset: follow the manual—press and hold the reset button for 3 seconds or use the reset position on the temperature dial. If the code clears and the boiler runs normally for a while, the fault may be intermittent but still needs investigation if it returns.

3. Check for obvious signs: look for water ingress, corrosion, burned or damaged wiring around the boiler exterior, and ensure the boiler cover is seated correctly. Check the boiler model and serial number to have ready for the engineer.

If you are competent and choose to proceed (only if comfortable working safely with isolated electrical equipment):

1. Isolate the electrical supply (double-check power is off) and remove the boiler outer case following the manufacturer’s guidance. Do not attempt if unsure.

2. Locate the Heat Control Module (HCM) / code plug area (refer to manual for exact location). Inspect the module and connector for loose connections, corrosion, bent pins or moisture.

3. Gently remove and re-seat the HCM: unplug the connector and then re-insert firmly ensuring correct orientation and full seating. Some faults are caused by a slightly unseated module.

4. Refit the casing, restore power and check the display. If the 360 error is gone and the boiler functions normally, monitor for recurrence. If the code returns immediately or soon after, proceed to the next steps.

Further diagnostic steps and when to stop and call a professional:

1. If re-seating the HCM does not clear the fault, do not attempt to replace the module unless you are a qualified engineer. An incorrect replacement HCM can cause the same error; compatibility with the control box and the correct part number matters.

2. If the boiler shows additional cause codes (three-digit cause code) or accompanying fault codes, note them and pass all information and photos to the service engineer. This helps them diagnose whether the HCM, code plug, wiring loom or the control box itself is at fault.

3. A Gas Safe engineer can test the HCM and control box, check the code plug integrity, check internal wiring, and confirm compatibility or replace the faulty part. They can also update firmware or perform safe replacement of internal modules.

Important notes:

1. Do not attempt to modify or jury-rig a replacement HCM from an unknown source. Using an incorrect or non-genuine module can prevent the boiler from operating correctly and may create a safety issue.

2. If the boiler is showing a locking error (flashing triangle) after the fault, the boiler will need to be reset after the underlying fault is repaired; do not repeatedly reset without remedy.

3. Provide the engineer with the boiler model, serial number, the exact fault and cause codes, and photos of the module area if possible — this speeds diagnosis.

Call a professional: If the basic checks and re-seating do not clear the error, or if you see damaged electronics, water ingress, or repeated faults, contact a Gas Safe registered Worcester Bosch engineer or an accredited service centre. This fault commonly requires a trained engineer to confirm whether the HCM needs replacement or whether a control box or wiring fault is present. Do not attempt gas-side or advanced electrical repairs yourself.