Baxi Error E125: No circulation / circulation fault
The boiler has detected a lack of water circulation in the primary circuit (the temperature is rising without normal flow), so it stops to protect itself. On the Luna Duo-Tec this is code 125 'No circulation of the water.' We diagnose and repair it across Greater Vancouver — same-day and after-hours.
The boiler has detected a lack of water circulation in the primary circuit (the temperature is rising without normal flow), so it stops to protect itself. On the Luna Duo-Tec this is code 125 'No circulation of the water.'
Baxi fault codes can vary by model and series. Use this as a guide — the same code can have more than one cause. Our Technical Safety BC–licensed technicians read the code, confirm it against your unit's manual, and diagnose the true cause before any repair.
Likely causes of Baxi error E125
- Seized, airlocked or failed circulator pump
- Air trapped in the system
- Closed isolation valves or a blocked/sludged system
- Heating supply/return sensors not making good contact with the pipe
- Low system pressure
What you can safely check
- Check the pressure gauge is in the normal band
- Check whether radiators stay cold while the boiler is firing
Beyond these checks, do not open the unit or touch gas/electrical parts — BC law requires a licensed gas fitter. Call us for a proper diagnosis.
Error E125 usually leaves you without heat or hot water and can indicate a safety-related fault. Don't keep resetting it — call for priority after-hours Baxi repair.
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Parts often behind Baxi error E125
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Baxi Error E125 Repair Across Metro Vancouver
Frequently Asked Questions
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