ATAG fault code BL 82
Fault code BL 82 on an ATAG boiler (including 24/32Ci and 24C) means: Flue gas sensor short-circuited, heat demand blocked and pump capacity at minimum. 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 BL 82 on an ATAG boiler indicates: Flue gas sensor short-circuited, heat demand blocked and pump capacity at minimum.
Fixing fault code BL 82: step by step
- Read the water pressure on the display or gauge. With the system cold it should be between 1.5 and 2 bar.
- Bleed the radiators with a radiator key, then check the pressure again and top up if needed.
- When there is a heat demand, feel or listen whether the pump is running (a light vibration or hum).
- Reset the appliance once. If the code comes straight back, do not keep resetting it.
- If the pump is not running, or the code comes back, the pump is seized or faulty.
Applies to
ATAG 24/32Ci, 24C, 24Ci, 35Ci, 35S, Blauwe Engel, Blauwe Engel II, Enigma, 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.
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 water trap pressure sensor € 33.98
- Atag sensor hot water cylinder/return T2-3-8-9 € 38.05
- Atag flow sensor/DHW T1 12k ohm € 61.16
Further reading on this cause
Other ATAG codes with the same cause
- 10 — Outdoor sensor fault (e.g. open, short-circuited, out of range)
- 102 — Pressure sensor defective
- 110 — Flow sensor fault (e.g. open, short-circuited, out of range)
- 112 — Return sensor fault (e.g. open, short-circuited, out of range)
- 114 — Outdoor sensor fault (e.g. open, short-circuited, out of range)
- 20 — Flow temperature sensor defective
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 BL 82 mean?
Flue gas sensor short-circuited, heat demand blocked and pump capacity at minimum.
How do I fix fault code BL 82 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 BL 82?
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 BL 82 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 →