BoilerFaultCodes 8
Controlled stop (flow set point exceeded by 5°C)
Remeha Avanta Fault codes & diagnostics
22 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
CombiSystem Natural Gas 24-39 kW 2005-2016 Discontinued
GC Numbers 41-288-0941-288-1041-288-1341-288-14
Replaced by: Remeha Tzerra
Download the Remeha Avanta 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. 8 High
1 Medium
1 Low
12 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 |
|---|---|---|
| 41-288-09 | Avanta 12 V | 2009–present |
| 41-288-10 | Avanta 24 V | 2008–present |
| 41-288-13 | Avanta 15v | 2009–present |
| 41-288-14 | Avanta 30 V | 2009–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 Remeha Avanta faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes
All 22 documented codes
Tap any card for details
9
Display code when external interlock circuit is open
d5
Your boiler has temporarily paused heating because it has already reached the temperature you set, but it is currently waiting for a short safety delay before it starts up again.
d8 Your boiler has temporarily stopped because it detected that the water inside is getting hotter than the temperature you have set, likely due to poor circulation.
Your boiler has temporarily stopped because it detected that the water inside is getting hotter than the temperature you have set, likely due to poor circulation.
Parts commonly replaced
- Pump
- Central heating filter
- System diverter valve
Related codes
d9 Your boiler has detected that the water inside is heating up too quickly or is struggling to circulate, so it has safely shut itself down to prevent internal damage.
Your boiler has detected that the water inside is heating up too quickly or is struggling to circulate, so it has safely shut itself down to prevent internal damage.
Parts commonly replaced
- Central heating pump
- Plate heat exchanger
- Diverter valve
é0 Your boiler has stopped working because one of its internal temperature sensors is providing faulty data, preventing the system from safely heating your home.
Your boiler has stopped working because one of its internal temperature sensors is providing faulty data, preventing the system from safely heating your home.
Parts commonly replaced
- Flow temperature sensor
- Return temperature sensor
- Wiring loom
Related codes
E1
High limit temperature protection (flow temperature exceeds 98°C), requires manual re-set
é1 Your boiler is struggling to ignite or begin its normal operation sequence, so it has locked itself out for safety.
Your boiler is struggling to ignite or begin its normal operation sequence, so it has locked itself out for safety.
Parts commonly replaced
- Ignition electrode
- Gas valve
- Control board
Related codes
é2 Your boiler is failing to start up properly, meaning it cannot provide heating or hot water at this moment.
Your boiler is failing to start up properly, meaning it cannot provide heating or hot water at this moment.
Parts commonly replaced
- Ignition transformer
- Gas valve
- Main PCB
Related codes
é3 Your boiler has detected an electrical safety fault, usually indicating that the appliance is not properly connected to the building's electrical grounding system.
Your boiler has detected an electrical safety fault, usually indicating that the appliance is not properly connected to the building's electrical grounding system.
Parts commonly replaced
- Control unit (PCB)
- Earth wiring loom
Showing 11–20 of 22
é4
More than 5 start attempts without any flame formation.
é5
No ionisation or ionisation failure more than 5 times during one heat demand.
é6
Unwanted flame formation
E7
Lock out, requires manual re-set
é7 Your boiler is failing to start up properly, meaning it cannot ignite to provide you with heating or hot water safely.
Your boiler is failing to start up properly, meaning it cannot ignite to provide you with heating or hot water safely.
Parts commonly replaced
- Ignition transformer
- Gas valve
- Main circuit board
é8
Fan fault
é10 Your boiler is struggling to push water around the system, usually because the pressure is too low or air is trapped inside the pipes.
Your boiler is struggling to push water around the system, usually because the pressure is too low or air is trapped inside the pipes.
What to check first
- Check your boiler's pressure gauge and ensure it reads between 1.0 and 1.5 bar.
- If the pressure is low, use the filling loop to top it up to the correct level.
- Bleed your radiators starting from the one furthest away to remove any trapped air.
Parts commonly replaced
- Circulation pump
- Pressure sensor
Related codes
é11
Air box temperature to high
é13 Your boiler has detected a safety-related electrical overload or thermal issue inside the main burning chamber and has shut down to prevent damage.
Your boiler has detected a safety-related electrical overload or thermal issue inside the main burning chamber and has shut down to prevent damage.
Parts commonly replaced
- Heat exchanger
- Main wiring harness
- Burner seal
Related codes
é43
Parameter limits
Showing 21–22 of 22
é44
Parameter check
é45
Default parameters
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.