Intergas error code 5, no hot water or heating
If your Intergas boiler shows error code 5, the boiler has detected a fault related to the ignition or flame detection system. In most situations this error causes the boiler to shut down completely, which means you are left without hot water, heating, or both.
This problem is common with Intergas boilers and usually cannot be solved permanently by simply resetting the system. When error code 5 keeps returning, professional inspection is required to restore safe and reliable operation.
HRi Techniek provides fast and professional Intergas boiler repair for homeowners and expats in The Hague and surrounding areas. In many cases, we can resolve this issue the same day.
What does Intergas error code 5 mean?
Error code 5 indicates that the boiler is unable to correctly ignite or confirm the presence of a flame. For safety reasons, the system immediately shuts itself down when this happens.
Although the boiler may appear to restart after a reset, the underlying fault often remains. As a result, the error code usually returns after a short time.
Intergas error code 5 – Weak flame signal (HRE / HReco)
Intergas error code 5 means that the boiler is attempting to ignite, but the flame signal is too weak or unstable. For safety reasons, the Intergas HRE or HReco boiler shuts down immediately to prevent unsafe operation. This fault usually indicates a problem with the combustion process or one of the components responsible for flame detection.
Possible causes of Intergas error code 5:
- A blocked condensate drain or siphon, which can interfere with proper combustion.
- Gas pressure that is too low or unstable (below approximately 20 mbar).
- A dirty or defective ignition unit or ignition cable.
- Incorrect adjustment of the gas valve.
- An earthing (grounding) problem in the electrical supply.
- Issues with air supply or flue gas exhaust, such as blockages or recirculation of flue gases.
If this error keeps returning, the boiler should not be restarted repeatedly. Repairs may only be carried out by a certified heating engineer. Contact us today on 070 204 2980 for professional assistance.
Price estimate via WhatsApp – Fast, clear and no hassle
Would you like to quickly know what a repair, boiler fault or replacement part is likely to cost? You can request a price estimate directly via WhatsApp. Simply send us a photo or short video of the boiler or the problem, and we will give you a clear indication of what you can expect.
How it works:
- Send a photo or video of the Intergas boiler fault via WhatsApp.
- You will receive a price indication straight away, without needing to make an appointment first.
- We explain the expected costs in advance, so you know where you stand.
- If you would like us to carry out the repair, we can immediately schedule a suitable time slot.
- No surprises afterwards – we always discuss what is needed first.
Would you like to know the cost first? Send a photo of your boiler via WhatsApp now.
Solutions for Intergas Error Code 5
Intergas error code 5 occurs when the boiler detects a weak or unstable flame signal. The flame may ignite briefly, but then disappears or is not recognised as reliable. For safety reasons, the boiler shuts down to prevent unsafe operation.
Intergas error code 5 – Weak flame signal (HRE / HReco)
To resolve this issue properly, a qualified heating engineer must thoroughly inspect the ignition system, gas supply and flue system. Below is an overview of what is typically checked during a professional inspection.
How Intergas error code 5 is resolved:
- Checking and cleaning the condensate drain or siphon if it is blocked.
- Measuring and adjusting the gas pressure if it is too low or unstable (below approximately ±20 mbar).
- Testing the ignition unit and ignition cable for damage, contamination or wear.
- Inspecting and, if necessary, readjusting the gas valve settings.
- Checking the boiler’s earthing to ensure correct flame detection.
- Inspecting the air supply and flue gas exhaust for possible blockages, leaks or flue gas recirculation.
Possible parts that may need replacement:
- Ignition unit or ignition cable in case of wear or damage.
- Ionisation probe if the flame signal remains unstable.
- Siphon or condensate drain if there is a clear blockage.
- Gas valve or wiring if insufficient voltage is detected.
Onze CV-monteur vervangt alleen onderdelen die aantoonbaar niet meer goed werken, zodat de ketel weer veilig en betrouwbaar draait.
If this error keeps returning, the boiler should not be restarted repeatedly. Repairs may only be carried out by a certified heating engineer. Contact us today on 070 204 2980 for professional assistance.
Get a quick cost indication before we come out
Not sure what an Intergas boiler repair is likely to cost? You don’t have to commit to an appointment first. By sharing a photo or short video of the boiler fault, we can often give you a realistic cost indication in advance.
This helps you decide whether you want the repair carried out and prevents unexpected costs later on.
What to expect:
- You send us a photo or short video of the boiler problem.
- Our engineer reviews the issue and gives a clear cost estimate.
- We explain what is likely needed and why.
- If you agree, we plan the repair at a suitable time.
- No work is carried out without prior discussion.
This approach is especially helpful for expats who want clarity before scheduling a visit. If you would like an indication first, you can contact us directly via WhatsApp.
FAQ
Here you can find answers to the most frequently asked questions about boiler faults, maintenance, repairs, and installation. Can’t find your answer? Feel free to contact us.
Intergas fault code 5 indicates a flame detection problem where the boiler does detect a flame, but the ionisation signal is unstable or too weak. This means the combustion process is not stable, and the boiler shuts down as a safety precaution to prevent unsafe operation.
If fault code 5 keeps returning after a reset, it usually points to a structural issue rather than a temporary fault. Common causes include a worn ionisation probe, poor grounding, unstable gas pressure, or early signs of a failing PCB. These issues require proper diagnosis and cannot be fixed with a simple reset.
You can reset the boiler once to see if the issue was temporary. However, if the error reappears, repeated resetting is not a solution. The underlying problem will remain and can worsen over time, leading to more frequent shutdowns or complete failure of the boiler.
The fault itself is a safety mechanism, but the underlying issue can affect the combustion process. Problems with flame detection, gas supply, or airflow can lead to inefficient or unstable operation. That’s why it’s important to address the issue as soon as possible.
Yes, in many cases fault code 5 is caused by contamination or wear of components such as the ionisation electrode or burner. During maintenance, these parts are cleaned, checked, and adjusted if needed. This helps ensure stable combustion and reduces the risk of recurring faults.
If the error occurs multiple times, the boiler fails to stay on, or the issue returns shortly after a reset, it’s important to call a technician. Continued operation under these conditions can lead to further damage and unreliable heating performance.