BoilerFaultCodesYour boiler is unable to read the temperature of your hot water tank, which means your taps and showers may not get hot.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Hot water storage temperature sensor is defective – connect the plug to the hot water temperature sensor correctly, mount the hot water temperature sensor correctly or replace the hot water temperature sensor
What causes this fault?
This fault occurs when the boiler loses communication with the sensor that monitors the temperature inside your hot water cylinder. The most common reason is that the sensor has developed an internal electrical failure, or the wiring connecting the sensor to the boiler has become loose or damaged. Without this data, the boiler shuts down hot water production as a safety precaution to prevent overheating.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like 1022 B — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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