Intergas error code 4, What does it mean and what can you do?
Intergas error code 4 is a common boiler fault and usually occurs when something goes wrong during the ignition process. The boiler fails to build up a stable flame, or the flame goes out immediately after ignition. This can be caused by contamination, a faulty component, or an incorrect air-to-gas mixture.
When this error occurs, the boiler typically shuts down completely, leaving you without heating and hot water. Resetting the boiler rarely solves the issue permanently, as the underlying problem often remains.
HRi Techniek provides professional Intergas boiler repair for expats and homeowners in The Hague and surrounding areas. We can accurately diagnose the cause of error code 4 and restore your heating system safely and reliably.
What does Intergas error code 4 mean?
Intergas error code 4 indicates a problem with the flame detection system. This section explains what the error means and when it is necessary to call a professional heating engineer.
Intergas error code 4 – No flame signal (HRE / HReco)
Intergas error code 4 means that the boiler does not detect a flame after ignition. The boiler attempts to start, but the flame is not recognised by the system. As a safety measure, the Intergas HRE or HReco boiler shuts down immediately.
When this happens, the boiler will usually stop working completely, resulting in no heating and no hot water.
Common causes of Intergas error code 4:
- The gas valve is closed or not fully open.
- Gas pressure is too low or unstable (below approximately ±20 mbar).
- The condensate drain or siphon is blocked, preventing proper combustion.
- The ignition unit or ignition cable is dirty or damaged.
- Incorrect or poor ignition distance.
- The gas valve or ignition unit is not receiving power.
- An earthing (grounding) issue within the installation.
If the error keeps returning, repairs may no longer be carried out by non-certified technicians. Contact us today on 070 204 2980 for professional assistance and safe repair.
Know the cost before booking a repair
When your Intergas boiler shows an error code, it’s understandable that you first want to know what a repair might cost. You don’t need to schedule a visit straight away. By sharing a clear photo or short video of the boiler or the displayed error, we can often assess the situation remotely and give you a realistic cost indication.
This way, you can decide calmly whether you want the repair carried out, without any pressure or unexpected charges later.
What happens next?
- You contact us via WhatsApp and share a photo or short video of the issue.
- We review the information and explain what is most likely causing the problem.
- You receive a clear indication of the expected costs.
- If you decide to proceed, we arrange a suitable time for the repair.
- All work is discussed in advance, so you know exactly what to expect.
This approach is especially convenient for expats who value clarity and good communication. If you would like a cost indication first, simply contact us via WhatsApp.
Solutions for Intergas error code 4
Intergas error code 4 occurs when the boiler fails to detect a flame signal. This is not something that can be resolved by the user. A qualified heating engineer must inspect the relevant components and recalibrate the system where necessary. Below you can see what is typically checked during a service visit.
Intergas error code 4 – No flame signal (HRE / HReco)
With Intergas error code 4, it is often the case that a component is worn or defective. During the inspection, the heating engineer determines which parts are still functioning correctly and which need to be repaired or replaced. This approach helps prevent the fault from returning shortly after the repair.
How Intergas error code 4 is resolved:
During a professional inspection, the following checks are usually carried out:
- Ensuring the gas valve is fully open and testing the gas supply.
- Measuring and adjusting the gas pressure if it is too low or unstable.
- Cleaning the condensate drain or siphon if it is blocked.
- Inspecting the ignition unit and ignition cable for wear or damage.
- Checking and adjusting the ignition distance if required.
- Verifying that the gas valve and ignition module are receiving power.
- Checking the earthing of the installation to ensure proper flame detection.
Possible parts that may need replacement:
Depending on the condition of the boiler, one or more components may need to be replaced:
- Ignition unit or ignition cable in case of wear or damage.
- Ionisation probe if the flame signal cannot be detected reliably.
- Siphon or condensate drain if it is blocked or outdated.
- Gas valve or wiring if stable voltage is not being supplied.
Our heating engineer only replaces parts that are proven to be defective, ensuring that your boiler operates safely and reliably again.
If the fault keeps returning, repairs may no longer be carried out by non-certified technicians. 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 4 indicates a flame detection issue. The boiler attempts to ignite but fails to register a stable flame signal. This is usually caused by a dirty burner, a faulty ionisation electrode, or an issue with the gas supply. As a safety measure, the boiler shuts down automatically.
You can try resetting the boiler once to see if the issue was temporary. If the fault returns, it usually means there is an underlying technical problem that needs proper inspection. In most cases, cleaning or replacing components and checking the combustion settings is required to resolve the issue permanently.
Yes, this fault is often linked to contamination or wear of key components such as the burner or ionisation probe. During routine maintenance, these parts are cleaned and inspected, which significantly reduces the chance of ignition and flame detection problems.
If the boiler keeps shutting down, fails to ignite, or the error keeps coming back after a reset, it’s important to call a technician. Ignoring the issue can lead to further damage or complete boiler failure, especially during periods of high demand.