Verified boiler fault code
ATAG 140 Fault Code (i-Range (2019 and newer))
Dynamic pressure check failed, or no pump detection.
Safety disclaimer
Fault code summary
- Manufacturer
- ATAG
- Fault code
- 140
- Fault type
- Pump, Pressure sensor, Circulation
- Severity
- Not specified
- Reset
- ATAG distinguishes blocking codes from error codes; a locked boiler may require reset and/or service intervention.
- Applicable models
- ATAG iC, ATAG iS, ATAG iR
Quick answer
Dynamic pressure check failed, or no pump detection.
What does this fault code mean?
Dynamic pressure check failed, or no pump detection.
Common causes
- Dynamic pressure check failure.
- No pump detection.
Symptoms
- The ATAG display shows error code 140.
What can the homeowner safely check?
- Record the code and contact the installer.
Boiler reset information
ATAG distinguishes blocking codes from error codes; a locked boiler may require reset and/or service intervention.
When should I call an engineer?
Contact a suitably qualified heating engineer when the fault persists, the boiler locks out, or the manufacturer instructions do not resolve it. For gas appliance work in the UK, use a Gas Safe registered engineer.
Engineer diagnosis
- Investigate pump detection, pressure and primary circulation.
Applicable boiler models
Related fault codes
- 101 — i-Range (2019 and newer)
Overheat.
Read fault code - 102 — i-Range (2019 and newer)
Pressure sensor error.
Read fault code - 103 — i-Range (2019 and newer)
Flow check failed three times (flow-check sequence 1, 3 or 4; last check 1).
Read fault code - 104 — i-Range (2019 and newer)
Flow check failed.
Read fault code - 105 — i-Range (2019 and newer)
Flow check failed three times (flow-check sequence 1, 3 or 4; last check 3).
Read fault code - 106 — i-Range (2019 and newer)
Flow check failed three times (flow-check sequence 1, 3 or 4; last check 4).
Read fault code - 107 — i-Range (2019 and newer)
Flow check 5 failed.
Read fault code - 108 — i-Range (2019 and newer)
Pressure below Pmin (less than 0.5 bar); filling is needed.
Read fault code
Manufacturer documentation
ATAG - Boiler Troubleshooting2019 & newer range: 140 — Dynamic Pressure Check Failed (or no pump detection).
Last verified
2026-09-12
Frequently asked questions
What does ATAG 140 mean?
Dynamic pressure check failed, or no pump detection.
Can I reset a ATAG 140 fault?
ATAG distinguishes blocking codes from error codes; a locked boiler may require reset and/or service intervention.