What does the Ideal 925 fault code mean?

Your boiler is heating up too quickly and has shut down to prevent overheating, likely because the water isn't moving through the system properly.

How much does it cost to fix Ideal error code 925?

Typical repair cost for the Ideal 925 fault is £150-£350 including labour.

Can I fix Ideal fault code 925 myself?

Check that all radiator valves are fully open

Ideal 925 Fault Code: What It Means & How to Fix It

Technical description

Maximum temperature - Flow temperature T1 increase too fast

What causes this fault?

This fault occurs when the water inside the heat exchanger reaches its maximum safe temperature almost immediately after the burner ignites. The most common reason is a blockage or a failed pump preventing water from circulating, which causes the stationary water to boil instantly. It can also be triggered by a faulty sensor sending incorrect temperature readings to the boiler's control board.

This issue often surfaces when the heating is first turned on after summer, as the internal pump can seize up during long periods of inactivity.

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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Your boiler is heating up too quickly and has shut down to prevent overheating, likely because the water isn't moving through the system properly.

Technical description

What causes this fault?

Engineer required

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