High
No Water Flow on Ideal Logic Max System 2

Your boiler has stopped working because it cannot detect any water moving through the system to keep it running safely.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

What the manual says

Manufacturer manual

No water flow detected

From this model's manual
Verified against the Ideal/Ideal Logic Max System 2 installation & service manual, page 72.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

F1View →F2View →L2View →

All 20 fault codes on the Logic Max System 2

Seeing a different code? Every code this model can display, in one place.

Blocked Flue/CondensateFan FaultFlame LossFlame On Before Gas OnFlow Thermistor FaultGas Valve FaultIgnition LockoutLow Mains VoltageLow Water PressureOutside Sensor FaultOverheat LockoutPCB FaultPump Dry RunPump FaultPump Rotor BlockedReturn Thermistor FaultRoom Thermostat FaultSpare PCB Not SetToo Many Restarts

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