CE
FAULT CODE
Viessmann
Water Pressure Too Low (GB162)
Low Severity
DIY Check Possible
On Worcester Bosch GB162 and Viessmann commercial boilers, CE (code 207) indicates the system water pressure is below the safe minimum.
Step-by-Step Fix Guide
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Step 1
Top up system pressure to 1.5 bar using the filling loop
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Step 2
Reset the boiler
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Step 3
If pressure drops again, check for leaks and contact a Gas Safe engineer
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.