ATAG fault code 902
Fault code 902 on an ATAG heat pump (including ENERGION IDM and ENERGION IDM 2Z) means: Flow sensor damaged. Reset the appliance once. If the code comes back, a part is usually faulty, often a temperature sensor. 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 902 on an ATAG heat pump indicates: Flow sensor damaged.
Fixing fault code 902: step by step
- Reset the appliance once; a one-off measuring error will then clear.
- Where you can reach it without opening the sealed combustion section, check that the sensor plug is seated firmly and the wiring is undamaged.
- If the code comes back, the sensor or its wiring is usually faulty (short or open circuit). Sensors in the sealed combustion section should be replaced by a qualified heating engineer.
Applies to
ATAG ENERGION IDM, ENERGION IDM 2Z, ENERGION IDM F, ENERGION IDM F 2Z, ENERGION IDM HYBRIDALL, ENERGION IDM HYBRIDzone, ENERGION IDM L, ENERGION IDM L F, 3301759, 3301760, 3301761, 3301762, 3301763, 3301764, 3302241, 3302242.
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.
Based on the cause, these original ATAG parts fit (always check the type number of your appliance):
- Atag flue gas sensor € 65.47
- Atag flow sensor € 62.35
- Atag water trap pressure sensor € 36.35
Further reading on this cause
Other ATAG codes with the same cause
- 1 — TD sensor error
- 114 — Outdoor sensor defective
- 730 — Buffer top sensor defective
- 732 — Storage tank bottom sensor defective
- 913 — LWT sensor error
- 914 — TR sensor error
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 heat pump fault code 902 mean?
Flow sensor damaged.
How do I fix fault code 902 on an ATAG heat pump?
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 902?
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 902 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 heat pump faults and codes at a glance →