BoilerFaultCodesWhat the manual says
Manufacturer manualDHW sensor short circuit. Check cable/connections not damaged. Renew DHW cable/sensor assy. Part No. 5106290
What causes this fault?
This fault occurs when the electrical circuit for the hot water temperature sensor is interrupted, usually by water ingress or internal component failure. The most common reason is that the sensor's internal insulation has broken down or the connecting wires have become pinched or corroded, leading to an incorrect electrical signal. Because the boiler can no longer monitor how hot the water is, it shuts down as a safety precaution to prevent scalding.
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.
Avoid the next call-out bill
A cover plan would handle faults like E08: no call-out fees, no surprise bills.
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Related fault codes
All 59 fault codes on the Powermax HE
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