How to Reset an Intergas Boiler

If your Intergas boiler suddenly turns off, don’t panic. Like most modern boilers, it has a built-in safety system designed to protect the unit from damage.

When something’s not quite right, the boiler goes into lockout mode.

This is the boiler’s way of saying, “Something’s wrong. Please fix me before I run again.”

Common triggers for lockout include:

• Low system pressure
• Ignition faults or no gas supply
• Overheating
• Power supply interruptions

Before you reset, always check the boiler’s display panel. Intergas boilers will show fault codes that point you in the right direction.

Understanding Intergas Boiler Error Codes

Error codes are your boiler’s built-in system to inform you what is wrong.

These codes will usually flash up on the screen whenever the unit goes into lockout.

While exact codes vary between models, here are a few you might encounter:

These codes may differ depending on the age and model of your Intergas boiler.

For the most reliable info, check your manual. If you’ve lost your Intergas manual, you can usually request to download one from their website.

Now that we’re up to speed with what the most common error codes mean, let’s get to the primary reset methods.

Reset Methods for Intergas Boilers

Intergas boilers are designed to be straightforward, so resetting them usually only takes a minute.

The exact method depends on your model, but the good news is that each option is simple once you know what to look for.

1. Using the Reset Button

Most Intergas models make life easy with a reset button on the front control panel.

If your boiler has one, press and hold it for around 3–5 seconds.

You might hear a click, see the display flicker, or notice the lights change as the boiler runs through its restart cycle.

It’s very similar to rebooting a phone or laptop when it’s acting up.

A quick refresh to clear the fault.

2. Resetting with the Selector Dial

Some Intergas boilers don’t have a separate button, but instead build the reset function into the main control dial.

To reset, turn the dial to the reset symbol or marked position, hold it there for a few seconds, then release.

Within moments, you should hear the boiler fire back up.

If you’re unsure where the reset position is on your model, your user manual will point it out.

However, the dial method is designed to be just as easy as pushing a button.

3. Digital Display Reset (Newer Models)

If you’ve got one of the newer Intergas boilers with a digital screen, the reset option will appear in the on-screen menu.

Use the arrow or menu buttons to navigate until you see “Reset,” then select and confirm.

The display may show a short progress bar or countdown as the boiler restarts.

Within a minute or two, your heating and hot water should be back online.

This method feels more like navigating a modern gadget, but it’s still very straightforward.

No matter which method applies to your Intergas boiler, always remember: if the same fault code keeps coming back after multiple resets, don’t keep forcing it.

That’s the boiler’s way of telling you it needs professional attention. Now for the steps to resetting your Intergas boiler.

Steps to Take Before Resetting

It’s easy to go straight for the reset button when your Intergas boiler flashes up a fault, but taking a couple of minutes to check the basics can save you a lot of hassle — and in some cases, it might fix the issue without a reset at all.

1. Check the Gas Supply

If you’re seeing an ignition error (like E01), the first thing to rule out is whether your boiler is actually getting gas.

A quick test is to turn on another gas appliance, such as your hob.

If that won’t light either, the issue isn’t with the boiler; it’s with the supply.

In that case, resetting won’t help, and you’ll need to contact your gas provider.

2. Look at the Water Pressure

Your Intergas boiler is happiest when the pressure gauge sits between 1.0 and 1.5 bar when cold.

Take a peek at the dial on the front of the boiler:

• If the needle is too low, top it up with the filling loop until it’s back in the green zone.
• If it’s crept too high, just bleed a radiator to let out a little water and bring it down.

3. Confirm the Power Supply

Sometimes the culprit is as simple as no electricity reaching the boiler.

Intergas boilers are usually wired into a fused spur. If you’re not sure what a fused spur is, it is a small white switch box near the unit.

Make sure that’s switched on.

If it is already on but the boiler is still unresponsive, check your fuse box for a tripped breaker.

Flicking it back into place could be all that’s needed.

Stick to these simple checks only. If your boiler still won’t reset or the same fault keeps coming back, don’t try any DIY fixes beyond this point.

When is it a good idea to reset, and not the best course of action?

When to Reset vs. When Not To

For those not sure if they should attempt to reset their boiler, here is a quick comparison list:

When to Reset:

• The fault looks minor (like low pressure or a one-off power cut).
• You’ve topped up the pressure or checked the supply, and the problem seems solved.
• The error code hasn’t appeared before and doesn’t immediately reappear after a reset.

Now, for when you need to call in an expert!

When Not to Reset:

• The same fault code keeps flashing up even after you’ve tried once.
• You hear unusual noises (like banging or whistling) when the boiler tries to restart.
• The boiler overheats regularly or shuts down again within minutes.
• You’re not confident about what the error code means.

If you find yourself in the “don’t reset” category, the safest option is to stop trying and call in a professional.

Continuous resets won’t fix the issue and could even make it worse.

Call a Professional

If your boiler keeps locking out after a reset, or the same error code keeps showing up, don’t keep pressing the reset button.

It won’t solve the problem and could make things worse.

The safest step is to call a Gas Safe registered engineer and give them the fault code you noted down.

That information helps them quickly pinpoint the issue and get your heating and hot water back up and running.

And if you’d rather skip the hassle of finding someone yourself, WarmZilla can connect you with trusted engineers across the UK who are experienced with Intergas boilers, often getting help out to you within 48 hours.