Main E160 fault code explained

E160 on a Main boiler means a fan fault, according to Baxi’s official error-code table. The fan is part of the boiler’s combustion and flue-safety system, so this is not a homeowner repair.

Keep the boiler casing closed. You may try one normal reset only if the user guide for your exact model allows it. If E160 remains or returns, stop resetting the boiler and arrange a Gas Safe registered engineer.

What does Main fault code E160 mean?

The boiler has detected that the fan system is not operating as expected. The fan helps the boiler manage combustion gases safely. The appliance may lock out because it cannot confirm the conditions needed to run.

E160 tells the engineer which safety system needs investigation, but it does not identify the failed part. The cause could relate to the fan itself, its electrical supply, connections, control signals or another condition affecting how it operates. Those possibilities cannot be distinguished from the display alone.

Which Main boilers use E160?

Baxi’s published table includes E160 in the model group covering the Main Eco Compact Combi and Main Eco Compact System. Other Main boilers may use different displays and codes. Record the full model name from the outside of the appliance and compare it with the official user guide before relying on any online explanation.

What can I safely check?

• Photograph the E160 display before pressing anything.
• Confirm the exact model and whether it is a combi or system boiler.
• Note whether the fault started during heating or hot-water demand.
• Check whether there has been a recent power cut or electrical work.
• From ground level only, look for an obvious external obstruction around the flue terminal, such as heavy snow or debris, without touching, dismantling or reaching into it.
• Listen for any unusual sound when the boiler attempts to start and describe it to the engineer.

Do not remove the front case, test the fan, move wiring, open the flue, bypass a safety device or attempt to lubricate anything. The fan and flue system must be assessed by a competent engineer.

Will a reset clear E160?

A single model-approved reset may clear a temporary interruption. If the code returns, repeated resets will not establish why the fan system is failing its checks. Leave the boiler off and arrange diagnosis.

If the code appeared after a power interruption, tell the engineer. That timing is useful evidence, but it does not make the fault safe to investigate yourself.

Is E160 dangerous?

The lockout is intended to stop the boiler operating when a combustion-safety component is not behaving correctly. Treat it seriously and do not try to force the appliance to run.

If a carbon-monoxide alarm sounds, anyone feels unwell with possible carbon-monoxide symptoms, you smell fumes or gas, or there is visible damage around the boiler or flue, switch off the appliance only if safe to do so, ventilate and follow the Gas Safe Register’s emergency advice. Do not operate electrical switches where gas may be present.

What will the engineer need to know?

Provide the exact E160 code, boiler model, a photo of the display, when it first appeared, whether one reset was attempted, recent power interruptions and any unusual starting noises. If the flue terminal is visible safely from the ground, mention any obvious external obstruction without trying to remove it.

Could E160 be confused with another code?

Digital characters can be misread, especially on a small or flashing display. A clear photograph avoids confusion between E160 and similar-looking numbers. The official error-code table and the model-specific guide should be used together.