ATAG fault code E 03
Fault code E 03 on an ATAG boiler (including 24/32Ci and 24C) means: Air box temperature too high. 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 E 03 on an ATAG boiler indicates: Air box temperature too high.
Applies to
ATAG 24/32Ci, 24C, 24Ci, 35Ci, 35S, Blauwe Engel, Enigma, Q-series, 24/32Ci / FGO … autom: MCBA1415, 24C / FGO … autom: MCBA1415, 24Ci / FGO … autom: MCBA1415, 35Ci / FGO … autom: MCBA1415, 35S / FGO … autom: MCBA1415, CMA 350, CMA 352, CMA 650, Blauwe Engel II, Q30CC, E22C / FGO … autom: MCBA5417, E26C / FGO … autom: MCBA5417, E32C / FGO … autom: MCBA5417, E32S / FGO … autom: MCBA5417, ESHR 24 T(i) (Standaard) / FGO, ESHR 24 Ti / FGO, ESHR 24/32 T(i) (Standaard), ESHR 28/35 Ti.
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 pump gasket 3/4" DN20 R38x25x2 mm 2 pcs € 18.95
- Atag sealing cap exhaust pipe Ø13mm for flue gas measurement € 20.91
- Atag pump M.UPMO 20/60 130 9U 230V on/off € 480.90
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 E 03 mean?
Air box temperature too high.
How do I fix fault code E 03 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 E 03?
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 E 03 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 →