Baxi E413 Fault Code: Fan Fault

What does E413 mean on a Baxi boiler?

E413 is a fan fault. The fan draws air in for combustion and pushes the burnt gases out through the flue. Before the burner lights, the boiler's control board checks that the fan is spinning at the correct speed.

If the fan has seized, is running too slowly, or the board is getting no speed signal back from it, the boiler refuses to light and displays E413 — a safety lockout.

This matters because the fan controls both fresh air to the burner and the safe removal of flue gases. If it isn't working properly, the boiler will not run. The lockout is the boiler doing exactly what it should: shutting down rather than burning gas without a working fan.

E413 sits in the same family as the more common Baxi E160 fan fault. The exact wording and code can vary slightly across Baxi ranges and badge-engineered models (Potterton, Main, Heatline), but the meaning is consistent: the boiler isn't satisfied the fan is turning at the speed it needs.

Common causes of E413

• A seized or worn fan — bearings wear out over years of use and the fan stiffens or stops turning altogether.
• A failed fan motor — the motor windings fail and the fan no longer spins up to speed.
• A loose or damaged fan wiring connection — a corroded plug or broken wire means the board gets no speed signal.
• A faulty speed sensor inside the fan — the fan may spin but the board can't read its speed.
• A blockage or restriction in the flue or air path that loads the fan and stops it reaching the required speed.
• A control board (PCB) fault — less common, where the board misreads a perfectly healthy fan.

Most E413 call-outs end in a fan replacement, but a good engineer will check the wiring and flue first rather than swapping the part on assumption.

What you can safely check

E413 is an engineer-only fault — there is no part of it you can safely repair yourself. There are, however, a few universal safe checks worth doing before you call out an engineer, in case the lockout was a one-off:

1. Check the gas is on. Make sure the gas supply isn't off at the meter and that other gas appliances work.
2. Check the pressure gauge. It should read roughly 1–1.5 bar when the boiler is cold — see what your boiler pressure should be. Low pressure is a different fault, but it's worth ruling out.
3. Reset the boiler once. Follow your manual or our guide on how to reset your boiler. Allow it to attempt ignition.
4. If it's freezing outside, check the condensate pipe. A frozen condensate pipe usually throws a different code, but thawing the external white pipe is one of the few safe jobs you can do.

That's the limit of safe DIY. Do not remove the boiler casing, touch the fan, the flue, the gas valve or any sealed component. That's both unsafe and, for gas parts, illegal for an unregistered person.

When to call a Gas Safe registered engineer

Call an engineer if E413 returns after a single reset — which it usually will, because a seized fan can't reset its way better. Only a Gas Safe Register engineer may open the sealed combustion circuit, the flue, the gas valve or the PCB.

A competent engineer will typically:

• Check the fan wiring, plugs and connections for damage or corrosion.
• Test the fan's speed signal and supply voltage against the manufacturer's figures.
• Inspect the flue and air path for blockages or restrictions.
• Replace the fan if it has seized or the motor has failed, then re-test combustion to confirm the boiler is safe.

This is the same boundary that applies to a boiler lockout generally: safe checks are yours, sealed and gas-side work is the engineer's. In any gas emergency — a smell of gas, for instance — leave the property and call the National Gas Emergency line on 0800 111 999.

Typical Baxi E413 repair cost

The most likely outcome is a fan replacement. Indicative 2026 UK costs are below — London and the South East tend to run 15–25% higher, and emergency or out-of-hours visits cost more.

Item	Indicative 2026 cost
Diagnostic / call-out	£60–£120
Replacement fan (part only)	£100–£200
Fan replacement (part + labour)	£200–£350
Wiring or connector repair	£80–£150
Control board (PCB) replacement, if needed	£300–£500+

For a wider picture of what heating jobs cost, see our boiler repair costs guide. Always get the fault confirmed before agreeing to a part — a wiring fix is far cheaper than a new fan.

Related Baxi codes

• Baxi E160 — the more common fan fault code on many Baxi models.
• Baxi E133 — ignition or gas supply fault (often a frozen condensate pipe in winter).
• Baxi E28 — flue/air pressure or condensate-related fault.
• For everything else, see the full Baxi fault codes hub.

Will boiler cover pay for an E413 repair?

It depends on your policy.

Many boiler cover plans include parts and labour for breakdowns like a failed fan, which makes an E413 repair the kind of thing a policy can be designed for — you'd typically pay only any agreed excess rather than the full part-plus-labour cost. But cover commonly excludes pre-existing faults, boilers over a certain age, and breakdowns reported during an initial exclusion period at the start of a policy.

If you already have cover, log the fault with your provider before paying for a private engineer. If you don't, weigh the one-off cost above against an annual premium — our guides on what boiler cover includes and whether boiler cover is worth it walk through the trade-offs.

This article is general information, not regulated financial or gas-safety advice. Always check your own policy wording and use a Gas Safe registered engineer for the repair.

This article is general information, not gas-safety or financial advice. Always have gas appliances checked and repaired by a Gas Safe registered engineer. In a gas emergency, call the National Gas Emergency line on 0800 111 999. Costs are indicative UK guides for 2026.