105
FAULT CODE
Ariston
Insufficient Circulation on DHW Circuit
Medium Severity
Engineer Required
The domestic hot water circuit has poor circulation. The flow rate through the plate heat exchanger is too low.
Step-by-Step Fix Guide
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Step 1
Check the mains water supply pressure is adequate
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Step 2
The plate heat exchanger may be scaled up and need cleaning or replacing
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Step 3 Engineer only
A Gas Safe engineer should investigate
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.