ATAG fault code Ex02sc02
Fault code Ex02sc02 on an ATAG boiler (including I-series and XL105) means: No flame after 4 ignition attempts during heat demand. 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 Ex02sc02 on an ATAG boiler indicates: No flame after 4 ignition attempts during heat demand.
Fixing fault code Ex02sc02: step by step
- Check that the gas valve at the appliance is open and that other gas appliances, such as the hob, are getting gas.
- Check that the condensate trap under the appliance is filled and clean; a blocked condensate drain can make the boiler lock out.
- Check outside that the air intake and flue are clear (leaves, a nest, ice or snow).
- Reset the appliance once. If the code comes straight back, do not keep resetting it.
- If the fault keeps returning, the ignition or ionisation electrode is usually worn or dirty. It sits in the sealed combustion section: have it replaced by a qualified heating engineer.
Applies to
ATAG I-series, XL105, XL70, XL140.
Click a model for the parts list and exploded view of that appliance.
Matching parts
ATAG 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 Atag-series: A Series · i Series (iCon) · Q Series · E Series · P-series (iCon) · Blauwe Engel · XL-series.
This message does not point directly to one faulty part. These are the parts that most often fit this appliance:
- Atag sealing ring intake fan SHR for OSS1/2/3/4 € 21.75
- Atag O-ring set 4.8 x 1.8 mm heat exchanger connection € 21.75
- Atag O-ring condensate tray/siphon € 23.10
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 ATAG boiler fault code Ex02sc02 mean?
No flame after 4 ignition attempts during heat demand.
How do I fix fault code Ex02sc02 on an ATAG 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 ATAG fault code Ex02sc02?
That depends on the exact cause. In the ATAG parts overview at Instalpunt you will find the current price and stock for each part.
Can I fix fault code Ex02sc02 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 ATAG boiler faults and codes at a glance →