ATAG fault code 140*
Fault code 140* on an ATAG boiler (including I-series) means: Dynamic pressure increase failed 2x (no pump detection). 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 140* on an ATAG boiler indicates: Dynamic pressure increase failed 2x (no pump detection).
Fixing fault code 140*: 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 I-series, i28CZ iCon1, i28ECZ iCon1, i32SZ iCon2, i36CZ iCon2, i36ECZ iCon2.
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 seal gas valve 3/4" € 19.71
- Atag sealing ring pump 1" 2 pcs € 20.39
- Atag O-ring set 2 pcs 21.89 x 2.62 mm plate heat exchanger € 23.79
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 140* mean?
Dynamic pressure increase failed 2x (no pump detection).
How do I fix fault code 140* 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 140*?
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 140* 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 →