Biasi
Parva M96 28C
Combi Boiler
28kW
2010-2015
ErP B
38 fault codes
<p>The Parva M96 28C is a combi boiler from Biasi, available at 28kW output. Produced 2010-2015.</p>
Parva M96 28C Fault Codes 38
Code
Description
Severity
Type
A1
Gas Valve Fault
The gas valve has a fault — not responding to control commands correctly.
High
Engineer
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E1
Low Water Pressure
The system water pressure has dropped below the safe minimum on Biasi boilers.
Low
DIY
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E10
Return Temperature Sensor Fault
The return NTC temperature sensor has developed a fault.
Medium
Engineer
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E11
False Flame Signal
The boiler is detecting a flame when the gas valve is closed. This is a serious…
High
Engineer
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E12
DHW Temperature Sensor Fault
The domestic hot water NTC temperature sensor is faulty.
Medium
Engineer
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E14
Gas Valve Fault
The gas valve is not responding correctly to commands from the PCB.
High
Engineer
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E16
Condensate Trap Full / Blocked
The condensate trap is full or the drain pipe is blocked. Condensate cannot drain freely.
Medium
DIY
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E17
Low Water Pressure
The system water pressure is below the minimum operating level.
Low
DIY
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E2
Safety Thermostat Activated
The boiler has overheated and the safety thermostat has cut out to prevent damage.
High
Engineer
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E3
Overheat Fault
The boiler has overheated and the safety thermostat has activated.
High
Engineer
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E4
Fan Fault / Air Pressure Switch
The fan is not operating correctly or the air pressure switch is not confirming airflow.
High
Engineer
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E5
NTC Sensor Fault
A temperature sensor (NTC thermistor) has a fault — either the flow or return sensor.
Medium
Engineer
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E6
False Flame Detected
The boiler's ionisation circuit has detected a flame when the gas valve should be closed.
High
Engineer
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E8
Flow Temperature Sensor Fault
The flow NTC temperature sensor has a short circuit or open circuit.
Medium
Engineer
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E9
Flue/Exhaust Temperature Fault
The flue gas temperature has exceeded safe limits, or there is an issue with the flue…
High
Engineer
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I1
Ignition Failure / No Flame
The most common Biasi fault code — the boiler has failed to ignite or lost its…
Medium
DIY
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I2
Overheat Lockout (Severe)
A severe overheat lockout that requires manual reset — more serious than E3.
High
Engineer
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