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Intergas Boiler 0.0 Fault Code

The Intergas fault code 0.00 relates to low water pressure and here we have Q & A. We could also offer you a service by you clicking on our emergency boiler repair booking.


The Intergas Boiler Fault Code 0.0 Error Common Q & A

Just below, we have a list of common questions relating to the 0.0 fault code on the Intergas Boiler.

Intergas boiler error code 0.0
  • What does the 0.0 fault code mean on my Intergas boiler?
  • Why does my boiler lock out, and will resetting it fix the problem?
  • What’s the most likely cause of the fault on my Intergas boiler?
  • My boiler’s pressure is below 0.5 bar, is there a DIY fix?
  • I’ve topped up my boiler’s pressure, now it’s too high, what can I do?
  • How can I prevent my boiler from showing the 0.0 fault code in the future?
  • How do leaks occur, and how can they be fixed?
  • Where do air locks occur, and can they be removed?
  • Is there anything else that could be causing the 0.0 fault on my Intergas boiler?
  • If the PCB is at fault, what could have caused the problem in the first place?
  • If leaks are the cause, what other parts needed checking?

What does the 0.0 fault code mean on my Intergas boiler

If your Intergas boiler is showing the 0.0 fault code on the display panel, it means water pressure is too low.

It’s likely that alongside the 0.0 being displayed, your boiler locks out; it will no longer work.

Why does my boiler lock out, and will resetting it fix the problem

A system with low water pressure, is going to have a circulation issue. And, that’s going to put excess strain on a range of expensive boiler components, including the heat exchanger and the pump. Continued operation would likely damage both components, adding to the existing cost of repair.

And, that’s why we never suggest resetting your boiler to try and clear a fault code. The boiler may work for 1-2 minutes, until the printed circuit board (PCB) determines that the fault still exists. During these few minutes, damage could be caused.

Instead of resetting your boiler, speak to a Gas Safe boiler repair company. Those with Gas Safe accreditation, are the only ones legally allowed to fix gas appliances. They’ll be able to diagnose and fix the problem, and then reset your boiler to clear the 0.0 fault code.

What’s the most likely cause of the fault on my Intergas boiler

The most likely cause of the 0.0 fault code being displayed on your Intergas boiler, is low water pressure.

So, first, you’ll need to determine whether this is the case. You can do this by checking the pressure gauge. Typically, we’d expect to see a pressure of 1.3 bar. Anything below 0.5 bar is going to mean that your boiler can’t circulate water, and it will lock out.

My boiler’s pressure is below 0.5 bar, is there a DIY fix

There is a DIY fix to increase your boiler’s water pressure. However, you should read this whole article first, to ensure you have fixed the problem, so it won’t happen again.

You’ll need to locate the filling loop; a small braided hose with a filling valve, usually located under the boiler’s casing. Using this valve, you’ll allow water to enter the system. When water enters the heating system, the pressure on your boiler will rise. As we’ve already mentioned, you’ll want to aim for around 1.3 bar of pressure.

Once you’ve topped up your boiler, you’ll need to reset it. That’s going to clear the 0.0 fault code from the display panel.

I’ve topped up my boiler’s pressure, now it’s too high, what can I do

High boiler pressure can lead to excess strain being put on expensive components. And, that’s going to mean in the long-term, expensive repair bills. So, you shouldn’t run your boiler at more than 1.3 bar.

If you’ve topped up your boiler to over 1.3 bar, there are two easy ways to remove water, and therefore, pressure.

First, you can locate the drain cock. You can connect a small hose to the drain cock and drain water outside. You’ll need to have someone to keep an eye on the boiler’s pressure, and let you know when it drops to 1.3 bar.

The second option, if you can’t find the drain cock, is to drain water from towel rails, or radiators. Each will have a small bleed valve. Using these bleed valves can be messy, so make sure you cover walls and floors, and have a container to catch water.

Open the valve, until water pressure on your boiler drops to 1.3 bar. As you do this, you may hear a hissing noise. Once this hissing noise stops, water will start to drain from the valve. The hissing noise is simply air escaping from your heating system. And, this is a good thing; air locks act like blockages and could be contributing to your system’s low pressure and inability to circulate water correctly.

How can I prevent my boiler from showing the 0.0 fault code in the future

You need to determine not just how to top up the pressure on your boiler, but what caused it to drop in the first place.

Here are a few things that could contribute to the 0.0 fault code being displayed on your boiler:

  • Leaking towel rails, radiators, valves, or soldered copper joints
  • Air locks

How do leaks occur, and how can they be fixed

Conent

If you’re suffering from low pressure, and it drops soon after topping up your boiler, the most obvious culprit, is a leak. Leaks come in all shapes and sizes. A small pin-hole in a radiator, an old copper joint and even a valve that’s not been installed correctly, could leak enough to drain your system, and eventually your boiler will lock out.

Either you, or a central heating repair company, will need to find and fix the leak. These leaks could be tiny, hidden under floorboards, or even in walls.

But, without fixing them, you’ll be leaving your boiler vulnerable to low water pressure, and that leads to parts being put under excess strain, not to mention the boiler locking out regularly; incredibly inconvenient.

Where do air locks occur, and can they be removed

As we mentioned in the section about reducing water pressure, you can remove air locks from radiators and towel rails via the bleed valve. Removing any airlocks in your central heating system may reduce the pressure in your boiler, so you may need to top up your boiler again using the external filling loop. You’ll be aiming for around 1.3 bar of pressure.

There’s another place that you can remove air from, and that’s the pump. The pump has a bleed screw that will help remove air locks. However, accessing the pump means taking the boiler apart, and this should only be done by a qualified boiler repair company. You shouldn’t attempt to dismantle your boiler to remove airlocks from the pump without Gas Safe accreditation.

Is there anything else that could be causing the 0.0 fault on my Intergas boiler

As with any fault code on any boiler, the PCB needs to be ruled out as the culprit. The PCB doesn’t just give and receive signals to/from all important boiler components, it also determines which is the best fault code to be displayed.

f there’s a problem with the PCB, the fault code being displayed could be incorrect. So, you’ll want to ask your boiler engineer to test the PCB. They’ll be able to do this using a multi-meter, going through each connection and wire, as well as the main PCB.

And, if they do find a problem, there’s a possibility the PCB is going to need to be replaced. Typically, you should expect to pay anywhere from £400-500 for a new PCB in your Intergas boiler.

If the PCB is at fault, what could have caused the problem in the first place

With the Intergas 0.0 fault code, it’s likely that your PCB has been water damaged due to internal boiler leaks. Although all kinds of leaks can reduce boiler pressure causing the 0.0 fault code to be displayed, one connected to the boiler’s PCB is likely to be an internal leak.

Typically, your boiler engineer is going to focus their attention on the pump. The seals on most boiler pumps will degrade over time. And, eventually, they can degrade to a point where the boiler pump starts to leak.

As older boilers electronic components aren’t as well sealed as newer ones, even the smallest of leaks can cause a huge amount of damage to your boiler.

So, your boiler engineer doesn’t just need to fix the pressure and PCB issues, they’ll also need to fix the internal boiler leak, so this doesn’t happen again.

If leaks are the cause, what other parts needed checking

Although it might only be the PCB showing problems, it’s worth checking all electronic parts using a multi-meter. If they’ve been subject to water damage, it’s likely they’ll fail soon, and prevention is always better than cure. On some occasions, damaged parts may need to be replaced to stop the boiler failing completely.

Other Intergas boiler issues

For more boiler issues regarding the Intergas boiler then please visit the Intergas Boiler Problems And Cures page.