BoilerFaultCodesIdeal 9.1.37 Fault Code
Also written as 9137 — same fault.
The Ideal 9.1.37 fault code means: your heating cannot circulate around your home because the main pump has stopped working or is not responding.. It appears on 1 Ideal model in our database.
Technical description: No CH or No CH1 Pump
What causes the Ideal 9.1.37 fault?
This fault occurs when the boiler's internal computer detects that the central heating pump is either completely stuck or not communicating properly. The most common reason is that the pump has seized due to a buildup of debris in the system water or an electrical failure within the pump's motor. Without this component spinning, the boiler cannot move hot water to your radiators and must shut down to prevent overheating.
This issue is frequently seen at the start of autumn when heating systems are turned on for the first time after being inactive all summer, which can cause internal pump components to seize.
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 9.1.37 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal 9.1.37 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