E130 Boiler Fault Code: What It Means on Every Brand

The E130 fault code appears on 3 boiler brands — Baxi, Main and Potterton — 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 3 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 E130 means	Severity	DIY?
BBaxi	The E130 code means your Baxi boiler has locked out after detecting a problem with the flue NTC (Negative Temperature Coefficient) temperature sensor. Full guide →	Lockout — engineer likely	No
MMain	The E130 code on a Main Heating boiler means the flue safety thermostat has tripped because the boiler detected an excessively high flue gas temperature — or the flue temperature NTC… Full guide →	Lockout — engineer likely	No
PPotterton	The E130 code appears on Potterton boilers when the flue overheat safety thermostat trips, forcing the boiler into a protective lockout. Full guide →	Lockout — engineer likely	No

E130 brand by brand

Baxi E130

The E130 code means your Baxi boiler has locked out after detecting a problem with the flue NTC (Negative Temperature Coefficient) temperature sensor. This sensor monitors the temperature of gases leaving the boiler through the flue. When the boiler's control board sees either an unusually high flue temperature or a signal from the sensor that looks incorrect, it shuts the boiler down as a safety precaution. The boiler will not fire again until the underlying fault is resolved and the lockout is cleared. Do not attempt to bypass this safety feature.

Causes, fixes & costs for Baxi E130 → · All Baxi codes

Main E130

The E130 code on a Main Heating boiler means the flue safety thermostat has tripped because the boiler detected an excessively high flue gas temperature — or the flue temperature NTC sensor itself has developed a fault. Either way, the boiler locks out as a safety precaution and will not fire again until the root cause is identified and resolved. This is not a fault you can simply reset your way out of; if it returns after one reset attempt, an underlying problem needs proper diagnosis by a Gas Safe registered engineer.

Causes, fixes & costs for Main E130 → · All Main codes

Potterton E130

The E130 code appears on Potterton boilers when the flue overheat safety thermostat trips, forcing the boiler into a protective lockout. This thermostat monitors the temperature of exhaust gases leaving the boiler; if those gases run hotter than a safe threshold, it cuts the boiler off to prevent damage and potential hazards. Because this is a genuine safety-critical shutdown rather than a soft warning, the boiler will not restart until the root cause has been addressed. Do not continue attempting to run the boiler until it has been properly investigated.

Causes, fixes & costs for Potterton E130 → · All Potterton codes

Frequently asked questions

Is the E130 fault code the same on every boiler?

Broadly, yes — on Baxi, Main and Potterton the E130 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 E130 fault myself?

Not usually. On every brand listed, E130 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 E130 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.