BoilerFaultCodesIdeal High Pressure Sensor Error Fault Code
Also written as HIGHPRESSURESENSORERROR — same fault.
The Ideal High Pressure Sensor Error fault code means: your heat pump has stopped working because its internal safety sensor has detected that the water pressure is too high, causing the system to shut down for protection.. It appears on 1 Ideal model in our database.
Technical description: High Pressure Sensor Error
What causes the Ideal High Pressure Sensor Error fault?
This fault occurs when the system's internal pressure exceeds safe operating limits, often due to the expansion vessel failing or being incorrectly charged. It can also be triggered by a faulty sensor sending incorrect readings to the control board or by someone accidentally overfilling the system via the filling loop.
This issue often surfaces when the heating is first turned on after summer, as the expansion vessel is put under maximum stress when the water transitions from cold to hot.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Ideal models that show the High Pressure Sensor Error fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal High Pressure Sensor Error fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026