BoilerFaultCodesIdeal 36 Fault Code
The Ideal 36 fault code means: your boiler has detected a problem with how it monitors gas supply pressure, meaning it cannot safely confirm there is enough fuel to stay lit.. It appears on 3 Ideal models in our database.
Technical description: Gas pressure detector (if present) is defective or the wires have not been properly connected.
What causes the Ideal 36 fault?
This fault occurs when the boiler's internal monitoring system loses contact with the sensor that checks for incoming gas. The most common reason is a physical failure of the pressure switch itself or a loose connection in the wiring that links the switch to the main control board. Without this signal, the boiler shuts down as a safety precaution because it cannot guarantee a steady flow of fuel.
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 36 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal 36 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