Intergas F019 Fault Code: Causes, Fixes & Repair Costs
What does the Intergas F019 fault code mean?
F019 appears on Intergas Xclusive and Xtreme boilers when the PCB detects a problem with its onboard memory module, known as the BMM (Boiler Memory Module or memory card). The board's built-in memory holds essential configuration data that tells the boiler how to behave; when that memory is corrupted, unreadable, or misconfigured, the boiler locks out and displays F019. This is not a minor nuisance fault — the boiler cannot operate safely without a functioning memory card, so it shuts down until the issue is resolved. A reset will occasionally clear a transient glitch, but in most cases a Gas Safe registered engineer will need to inspect or replace the PCB.
General guidance only — not a substitute for professional advice, and not certified by a Gas Safe engineer. Always have your specific appliance assessed by a qualified professional. Any gas work must be carried out by a Gas Safe registered engineer. If you smell gas or suspect carbon monoxide, leave the property and call the National Gas Emergency line on 0800 111 999.
Common causes
- PCB memory corruption or component failure Common
Over time, the memory chip on the PCB can degrade or develop a fault spontaneously, particularly on boards that have been running for several years. This is the most common scenario when F019 appears on a boiler that has not recently had any work carried out on it.
- Newly fitted PCB that has not been configured Common
If the PCB was recently replaced, the replacement board may not yet be synchronised to the boiler. Intergas requires a specific pairing or configuration code to be entered after a PCB swap; skipping this step will trigger a memory fault almost immediately.
- Moisture or water ingress onto the PCB Sometimes
An internal leak — from a heat exchanger, a pump seal, or a pipe joint — can allow moisture to reach the PCB over time. Even small amounts of condensation can cause memory components to corrode or short-circuit, resulting in F019.
- Power surge or electrical disturbance Sometimes
A sudden voltage spike — from a power cut, a faulty spur socket, or nearby electrical work — can corrupt the PCB's memory without visibly burning the board. If F019 appeared shortly after a power event, this is worth mentioning to your engineer.
- Faulty or loose wiring to the PCB Rare
Damaged, corroded, or improperly seated wiring harnesses connected to the board can cause intermittent communication errors that register as a memory fault, even if the PCB itself is still functional.
How to fix it
- Attempt a single boiler reset DIY safe
Locate the reset button on your Intergas boiler (usually a flame symbol or a dedicated reset button on the front panel). Press and hold it as described in your user manual. If F019 clears and the boiler fires up normally, monitor it over the next hour. If the fault returns, do not keep resetting — repeated resets will not cure a genuine PCB memory fault and may cause further stress to the board.
- Check your user manual if the PCB was recently replaced DIY safe
If you or an engineer has recently had the PCB swapped out, the new board will need to be paired to the boiler using a configuration code. Your Intergas user manual contains the procedure; follow it carefully. If you no longer have the manual, Intergas customer support can supply the pairing steps.
- Check for any visible signs of water around the boiler DIY safe
Have a look around the boiler casing, beneath it, and along any pipework you can see. Any damp patches, drips, or corrosion could indicate a leak that has affected the PCB. Note anything you find and report it to your engineer — fixing a leak before replacing a PCB is essential, otherwise the new board can be damaged too.
- Do not attempt to remove or repair the PCB yourself Gas Safe engineer
The PCB governs gas valve operation and safety circuits. Tampering with it without the correct training and equipment is dangerous and could void any remaining warranty. This work must be carried out by a Gas Safe registered engineer who has experience with Intergas appliances.
- Contact a Gas Safe registered engineer to diagnose and replace the PCB Gas Safe engineer
An engineer will confirm whether the fault is a genuine memory failure or something else — such as a wiring fault or a sensor issue triggering a false code. If the PCB does need replacing, they will source the correct board for your Xclusive or Xtreme model and carry out the swap, including the configuration procedure. Bear in mind that Intergas PCBs are not always held in stock, so there may be a short lead time. Ask your engineer to assess the boiler's overall condition at the same time, particularly if it is more than eight to ten years old.
Parts you may need
- Intergas Xclusive / Xtreme PCB (printed circuit board) · from £220
- PCB wiring harness / loom · from £35
- Boiler surge protection plug-in adaptor · from £25
The exact spare depends on your boiler's GC number (on the data badge). Check this against the part before buying.
Typical repair cost
Expect to pay roughly £350–£600, depending on the underlying cause.
Frequently asked questions
Can I reset the boiler myself to clear F019?
Yes, one reset is worth trying — it occasionally clears a transient memory glitch. However, if F019 comes straight back after the reset, stop there. Repeatedly resetting the boiler will not fix an underlying PCB memory fault and could put unnecessary strain on other components. Call a Gas Safe engineer for a proper diagnosis.
Why has F019 appeared right after my PCB was replaced?
This is actually a common scenario with Intergas Xclusive and Xtreme boilers. When a new PCB is fitted, it needs to be paired or synchronised to the boiler using a configuration code, which is detailed in the Intergas user manual or engineer documentation. If this step was missed, the board will not recognise the boiler's memory settings and will immediately flag a BMM fault. Contact the engineer who fitted the board — they should complete the pairing at no additional charge.
How much does it cost to replace a PCB on an Intergas boiler?
Most homeowners pay somewhere between £350 and £600 for a full PCB replacement on an Intergas Xclusive or Xtreme, covering the part and the engineer's labour. The PCB itself typically costs £180–£250 depending on the exact variant, with labour adding £150–£300 on top. In more complex situations — for example where water damage has affected surrounding components as well — costs can exceed £700. If your boiler is over ten years old and the repair quote is high, it may be worth asking your engineer to compare that cost against a new boiler installation, which typically runs from around £1,500 upwards.
Could F019 be caused by something other than the PCB itself?
Yes, occasionally. Although F019 points directly to a PCB memory card fault, a damaged wiring harness, a corroded connector, or a faulty sensor feeding bad data to the board can sometimes produce a misleading code. A good engineer will check the wiring and connections before committing to a PCB replacement, which could save you money if a simpler fix turns out to be the cause.