Listed below are the common Firebird fault codes as described by the boiler manufacturer along with a possible cause.

Firebird Boiler Error Codes

Occasionally some things can go wrong, that’s why we’ve created our handy at-a-glance table of Firebird

error codes.

1. Central heating not coming on

If your central heating isn’t coming on then it’s worth checking that your thermostats are turned on,

whether the bottom of the radiators are warm (may need to be bled) and low boiler pressure. If

none of these seem to be causing the issue then it’s likely to be an appliance issue, which will need a

Gas Safe registered engineer.

2. Low boiler pressure

If your central heating system isn’t working correctly then your boiler might be low on pressure.

You can easily check the pressure of the boiler by looking at the built-in pressure gauge –

if you see anything below 1 bar then the unit is low on pressure.

Fix low boiler pressure

Increasing low boiler pressure is something that’s safe to do yourself, our guide to low boiler pressure

can take you through the steps. Don’t hesitate to contact a Gas Safe registered engineer if you feel

the slightest bit unsure.

3. Boiler leaking

A leak can begin for one of many reasons, but it normally means that an internal component has broken,

usually a seal or valve. In time, this may lead to corrosion, rust or cause electrical components within

the boiler to short circuit.

Fix a leaking boiler

Once you spot the leak, turn the mains water supply off to prevent the leak from worsening.

You should contact a Gas Safe registered engineer as soon as you spot a leak from your central heating

system, even if it’s small.

4. Hearing strange noises

Limescale or sludge building up on your boiler’s heat exchanger can cause the boiler to make some

strange noises which is known as kettling. This build-up can restrict the flow of water within the

heat exchanger causing the water to boil then steam and whistle, like a kettle.

Fix strange noises

To allow the water to circulate properly, a Gas Safe registered engineer will be able to perform

a powerflush of the heating system, which involves flushing chemicals through the system to clear

any blockages. Once this has been done, it could be worth having a magnetic filter fitted to

the heating system which will catch any debris before it has chance to build-up.

5. Radiators not heating up

A number of things can prevent your radiators from heating up, but the most common reason

is sludge or air build-up in the system. If the bottom of your radiator is getting hot but not the top,

you may need to bleed it.

Fix cold radiators

Bleeding the radiators clears trapped air from the system, allowing the hot water to circulate around the entire

radiator. Our guide to bleeding radiators will take you through the steps if you wish to do this yourself but

otherwise, you should hire a Gas Safe registered engineer.