37
FAULT CODE
Johnson & Starley
Low Water Pressure (Numeric Display)
Low Severity
DIY Check Possible
On Johnson & Starley numeric display models, code 37 indicates low system water pressure.
Step-by-Step Fix Guide
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Step 1
Repressurise to 1.5 bar
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Step 2
Reset
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Step 3
Contact a Gas Safe engineer if pressure keeps dropping
Gas Safe Reminder
Work on gas appliances must be carried out by a Gas Safe registered engineer. The steps above cover safe checks a homeowner can perform - any internal component replacement requires a qualified professional. If in doubt, always call an engineer.