BoilerFaultCodes 1
Drawing D.H.W: burner switches off - check temperature probes, faulty D.H.W. flow switch
Ariston Genus 30 Plus Fault codes & diagnostics
10 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Combi Natural Gas 30 kW 2004-2007 Discontinued
GC Number 47-116-28
Replaced by: Genus ONE
Download the Ariston Genus 30 Plus manual
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The fault code is already on your display
Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →
Severity at a glance
Each cell = one fault code. Hover to identify. 10 Unrated
Just want the most common Ariston Genus 30 Plus faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes
All 10 documented codes
Tap any card for details
2
Drawing D.H.W: radiators heat up in summer mode - faulty 3-way valve
3
Drawing D.H.W: insufficient hot water temperature - check temperature probes, check gas pressures, check water flow rate
4
Drawing D.H.W: noisy operation - primary heat exchanger faulty or lime-scale deposits, low heating system water pressure, check gas pressures, check temperature probes
5
Decrease/increase heating circuit pressure - check for leaks on the heating circuit, faulty filling-loop, expansion vessel faulty
6
Repeated shutdowns - faulty detection electrodes, check gas settings, check flame detection electric circuit
7
Repeated intervention of safety thermostat - check temperature probes, overheat thermostat not calibrated correctly, air in primary water circuit
8
When cold water tap turned off, the boiler ignites - drop in pressure in the water mains, with consequent water hammer
9
Insufficient radiator temperature - check C.H. temperature probe, check by-pass, check gas pressures
30 40 50 60 70 80
Overheating safety feature