Intergas fault code F018
Fault code F018 on an Intergas boiler (including Xtreme) means: Flue gas outlet and/or air supply blocked. Reset the appliance once. If the code comes back, a part is usually faulty. You can check the water pressure and settings yourself; leave work on gas-carrying parts to a certified gas engineer.
After a safety alert (gas, flue gas, combustion), reset no more than once and call in a certified gas engineer. If you smell gas, call your national gas emergency number or 112 immediately.
Cause
Fault code F018 on an Intergas boiler indicates: Flue gas outlet and/or air supply blocked.
Fixing fault code F018: step by step
- Check outside that the air intake and flue are clear (leaves, a nest, ice or snow).
- Check that the condensate trap under the appliance is filled and clean; a blocked condensate drain can make the boiler lock out.
- Reset the appliance once. If the code comes straight back, do not keep resetting it.
- If the code comes back, stop resetting: a flue problem can let carbon monoxide (CO) into the home. Call in a qualified heating engineer and make sure you have a working CO alarm.
Applies to
Intergas Xtreme, 24, 30, 36, 36 first edition.
Matching parts
Intergas parts are available from Instalpunt; shipping to EU countries from €12.95 (€16.95 for more distant countries), usually 3–5 working days.
Parts per Intergas-series: Kombi Kompakt HRE · Kombi Kompakt HReco · Kombi Kompakt HR · Xtreme · Xtend · Prestige.
This message does not point directly to one faulty part. These are the parts that most often fit this appliance:
- Intergas pump sealing ring 1" for Kombi Kompakt HRE and Kombi Kompakt HR etc. € 1.02
- Intergas retaining spring NTC heat exchanger for Kombi Kompakt HRE and Kombi Kompakt HR etc. € 1.36
- Intergas retaining spring pressure sensor for Kombi Kompakt HRE and Xtreme etc. € 2.04
Fix it yourself or call an engineer?
Always consult the manual for your appliance and work safely. If in doubt or if the fault comes back, call in a qualified professional. A question about a part? Write to us at info@instalpunt.nl.
Frequently asked questions
What does Intergas boiler fault code F018 mean?
Flue gas outlet and/or air supply blocked.
How do I fix fault code F018 on an Intergas boiler?
First check the cause described above. Then restart the appliance using the reset button. If the message comes back, a part usually needs replacing or the fault needs to be repaired by a qualified professional.
Which parts do I need for Intergas fault code F018?
That depends on the exact cause. In the Intergas parts overview at Instalpunt you will find the current price and stock for each part.
Can I fix fault code F018 myself?
You can reset the appliance and check things like the water pressure or settings yourself. Work on gas-carrying parts must be left to a certified gas engineer.
All Intergas boiler faults and codes at a glance →