BoilerFaultCodesIdeal 38 Fault Code
The Ideal 38 fault code means: your boiler has stopped working because it has lost a secure electrical connection to the valve that controls the gas supply.. It appears on 1 Ideal model in our database.
Technical description: Check the electrical connections of the gas valve.
What causes the Ideal 38 fault?
This fault occurs when the boiler's internal computer can no longer detect or communicate with the gas valve. The most common reason is a loose or damaged wiring connection between these two parts, or an internal electrical failure within the valve itself. Without this secure link, the boiler cannot safely control the fuel supply and must shut down.
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 →Ideal models that show the 38 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal 38 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