Medium
384 on Potterton Assure 25 Combi

Your boiler has temporarily locked out due to a technical internal error and needs a reset, or possibly a check by a professional if the problem keeps returning.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

What the manual says

Manufacturer manual

Fault code requiring reset or further investigation

From this model's manual
Verified against the Potterton/Potterton Bm Potterton Assure Combi Installation Pdf installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Locate the reset button or turn the mode dial to the reset position on your Potterton Assure.Hold the reset button for about 3 to 5 seconds and release it.Wait to see if the boiler fires up normally; if the code returns immediately, do not keep resetting it.

Find a Gas Safe engineer
Search the official register →
Boiler cover options

Avoid the next call-out bill

A cover plan would handle faults like 384: no call-out fees, no surprise bills.

Approved partner
Domestic Appliance Guard
Unlimited call-outs, 24/7 helpline, no price-hike promise
Get a quote →

Affiliate links. We may earn a commission at no extra cost to you.

Related fault codes

E119View →E133View →E160View →

All 20 fault codes on the Assure 25 Combi

Seeing a different code? Every code this model can display, in one place.

0915202840103104107109110118125128130133134135160321

Related guides you might find useful

Boiler keeps cutting out

Lockout fault with a reset-needed pattern.

Read →

Pilot light keeps going out

Older boilers: thermocouple, draught or gas supply.

Read →

Is boiler cover worth it?

Break-even maths on monthly cover.

Read →