BoilerFaultCodes 164-026
Temperatureprobe(mainord.h.w.circuit)
Biasi Riva Compact 24S (M90E.24S) Fault codes & diagnostics
23 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Combi Natural Gas 24 kW 2002 onwards Discontinued
GC Numbers 47-970-1741-970-0847-970-15
Replaced by: Biasi Riva Plus
Download the Biasi Riva Compact 24S (M90E.24S) manual
PDF
Versions & GC numbers
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. 23 Unrated
Which version do you have?
The GC number on your boiler's data badge identifies the exact appliance and production years, as recorded in the UK Product Characteristics Database.
| GC number | Appliance (register name) | Produced |
|---|---|---|
| 47-970-17 | Riva Compact M90E.24S | 2002–present |
| 41-970-08 | Riva Plus M90D.24SR | 2002–present |
| 47-970-15 | Riva Plus M90D.24S | 2002–present |
Appliance names and production years are taken from the UK Product Characteristics Database (the SAP/SEDBUK register). Where a GC number is also printed in this model's own manufacturer manual, both sources were checked to agree.
Just want the most common Biasi Riva Compact 24S (M90E.24S) faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes
All 23 documented codes
Tap any card for details
169-083
Fuse1,6AT
E00-684
Primarycircuitflowswitch
E00-688
Main.flowswitchmembrane
E01-204
D.h.w.heatexchanger(mod.M90E.24S)
E01-205
D.h.w.heatexchanger(mod.M90E.28S)
E83-013
Safetyvalve
E83-082
D.h.w.flowswitch
E83-086
Threewaydivertervalve(electricactuator)
E83-101
Overheatthermostat
Showing 11–20 of 23
E83-121
Expansionvessel
E83-122
Detectionelectrode (M90E.24S,M90E.28S)
E83-126
Ignitionelectrode - right (M90E.24S,M90E.28S)
E83-127
Ignitionelectrode - left(M90E.24S,M90E.28S)
E83-129
Gasvalve
E83-142
Fullsequenceignitiondevice
E83-145
Temperature-pressuregauge
E83-178
Combustionchambersidepanels
E83-180
Combustionchamberrearpanel(mod.M90E.24S)
E83-181
Combustionchamberrearpanel(mod.M90E.28S,M90E.32S)
Showing 21–23 of 23
E83-196
Combustionchamberfrontpanel(mod.M90E.24S)
E83-197
Combustionchamberfrontpanel(mod.M90E.28S,M90E.32S)
N/A
Excessive temperature on primary circuit
Status & diagnostic codes 1 operating states & engineer diagnostics
Not faults — these are normal operating states. Tap to expand.
1 operating states & engineer diagnostics
Not faults — these are normal operating states. Tap to expand.