E14 Boiler Fault Code: What It Means on Every Brand

The E14 fault code appears on 2 boiler brands — Andrews and Biasi — and on all of them it points to the same kind of problem. The details still differ by brand (thresholds, sub-codes, reset procedure), so use the table below to jump to the page for your boiler.

Lockout — engineer likely 2 brands use this code

Which brand is your boiler?

The brand is printed on the front casing. Tap your brand for the full causes, fixes and repair costs.

Brand	What E14 means	Severity	DIY?
AAndrews	The E14 code on an Andrews water heater or boiler indicates that the appliance has attempted to light the burner but either failed to ignite or could not confirm a stable flame is present. Full guide →	Lockout — engineer likely	No
BBiasi	The Biasi E14 (sometimes shown as ER 14 on the display) is a blocking lockout fault that fires when the boiler detects a problem with coolant circulation. Full guide →	Lockout — engineer likely	No

E14 brand by brand

Andrews E14

The E14 code on an Andrews water heater or boiler indicates that the appliance has attempted to light the burner but either failed to ignite or could not confirm a stable flame is present. As a result, the boiler locks itself out as a safety precaution. To put this in context within the Andrews E-code series: E12 relates to a differential water flow switch fault (remaining open), E13 to the same switch remaining closed, and E15 to a gas valve command fault — placing E14 squarely between these as an ignition or flame-detection lockout. The boiler will not attempt to fire again until the underlying fault is resolved and the unit is reset. Because repeated failed ignition attempts can allow unburnt gas to accumulate, this code should be investigated promptly rather than reset indefinitely.

Causes, fixes & costs for Andrews E14 → · All Andrews codes

Biasi E14

The Biasi E14 (sometimes shown as ER 14 on the display) is a blocking lockout fault that fires when the boiler detects a problem with coolant circulation. In plain terms, the boiler's internal checks have found that water is either not moving through the system correctly or is overheating — most commonly because the circulation pump has slowed, seized, or lost communication with the control board. A secondary trigger is a faulty flow NTC (temperature sensor), which can send the boiler incorrect temperature readings and mimic a circulation failure. Because continued operation risks heat exchanger damage, the boiler shuts itself down and holds the lockout until the underlying fault is resolved.

Causes, fixes & costs for Biasi E14 → · All Biasi codes

Frequently asked questions

Is the E14 fault code the same on every boiler?

Broadly, yes — on Andrews and Biasi the E14 code points to the same class of fault, and the recommended response is similar. Model-specific details such as sub-codes and reset procedures still vary, so follow the page for your own brand.

Can I fix a E14 fault myself?

Not usually. On every brand listed, E14 points to a fault that needs a suitably registered engineer to diagnose and repair. A single reset to rule out a transient glitch is reasonable; repeated resets are not.

Who should I call about a E14 fault?

For gas boilers, a Gas Safe registered engineer — it is a legal requirement for any work on the appliance. If you smell gas at any point, leave the property and call the National Gas Emergency line on 0800 111 999.

General guidance only — not a substitute for professional advice, and not certified by a registered engineer. Any work on a gas appliance must be carried out by a Gas Safe registered engineer. If you smell gas, call 0800 111 999.