When your Remeha Avanta Plus boiler displays an error code, it's signalling a specific issue that needs attention. These fault codes aren't just random numbers; they're your boiler's way of communicating exactly what's wrong, helping you understand whether it's a simple fix or requires professional intervention.
This boiler error code guide will walk you through the most common Remeha Avanta Plus fault codes, explain what they mean, and provide clear solutions for each issue.
- What We Discuss Here
- » Rameha Boilers
- » Understanding Remeha Avanta Plus Fault Codes
- » Common Remeha Avanta Plus Fault Codes and Solutions
- - E0 Fault Code: Temperature Sensor Fault
- - E1 Fault Code: Overheat / Flow Temperature Too High
- - E2 Fault Code: Return Temperature Higher Than Flow
- - E3 Fault Code: Control Unit or Earth Fault
- - E4 Fault Code: Ignition Failure
- - E5 Fault Code: Gas Supply Issues
- - E6 Fault Code: Flame Detected When Boiler is Off
- - E7 Fault Code: Air Pressure Switch Problems
- - E9 Fault Code: No Water in System / Pump Fault
- - E10 Fault Code: No Flow During Venting
- - E11 Fault Code: High Airbox Temperature
- - E13 Fault Code: DHW Flow Switch
- - E43 Fault Code: Parameter Limits Error
- - E44 Fault Code: Parameter Check
- - E45 Fault Code: Default Parameters / Faulty Control Unit
- » Preventive Maintenance for Fault Code Prevention
- » Emergency Boiler Breakdown Service and 24/7 Support
Remeha Boilers
Remeha Avanta Plus boilers are well known for their heating reliability and efficiency, making them a popular choice among homeowners and landlords in London. That said, no heating system is completely immune to faults or breakdowns.
The key to maintaining your boiler's performance lies in understanding these fault codes and knowing when to take action.
Understanding Remeha Avanta Plus Fault Codes
Remeha Avanta Plus fault codes appear as alphanumeric displays on your boiler's control panel. Each code corresponds to a specific component or system within the boiler, allowing for precise diagnosis of issues. The diagnostic system continuously monitors various sensors, pumps, and safety devices throughout the boiler's operation.
These fault codes serve multiple purposes:
- They protect your boiler from damage by shutting down unsafe operations,
- Help technicians quickly identify problems, and
- Provide homeowners with valuable information about the status of their heating system.
The advanced diagnostic capabilities of the Remeha Avanta Plus make it one of the most user-friendly boilers for troubleshooting.
That’s why it’s essential to rely on a professional boiler repair service in London for expert support and peace of mind.
Common Remeha Avanta Plus Fault Codes and Solutions
E0 Fault Code: Temperature Sensor Fault
The Remeha Avanta Plus E0 fault code indicates a problem with the flow, return, or boiler temperature sensor. This can occur if the sensor is damaged, if its electrical connections are loose or broken, or if there's a short circuit in the sensor wiring.
Possible Causes:- Damaged temperature sensor
- Loose or broken electrical connections
- Short circuit in the sensor wiring
Check all electrical connections to the sensors to ensure they are secure and intact. Use a multimeter to test the resistance of the wires and sensors. If the issue persists, a replacement sensor may be required.
E1 Fault Code: Overheat / Flow Temperature Too High
The E1 fault code indicates that the flow temperature has exceeded the maximum set limit. This is often due to insufficient water in the system, trapped air, or a blockage in the water flow.
Possible Causes:- Low system water pressure
- Air is trapped in the system.
- Blockage in pipes or radiators
- Faulty pump
Repressurise the boiler to the recommended pressure, bleed the radiators to release trapped air, check that the pump is operational, and inspect for blockages.
E2 Fault Code: Return Temperature Higher Than Flow
The E2 code means the return water temperature is higher than the flow temperature, which is abnormal. This can be caused by the same issues as E1: lack of water, airlocks, obstructions, or sensor issues.
Possible Causes:- Low water pressure
- Trapped air in the system
- Flow or return sensor wiring faults
- Blockage in the system
Repressurise the boiler, bleed the system, check pump operation, and inspect sensor connections.
E3 Fault Code: Control Unit or Earth Fault
The E3 fault appears if there's a problem with the control unit or if the power supply is not properly earthed.
Possible Causes:- Incorrectly earthed mains supply
- Faulty control unit
Check that the mains power supply is properly earthed. If the issue seems to be with the control unit, contact a certified heating engineer for repair or replacement.
E4 Fault Code: Ignition Failure
The Remeha Avanta Plus E4 fault code indicates an ignition failure, meaning the boiler cannot establish a flame when attempting to start. This is one of the most common fault codes and can stem from several causes.
Possible Causes:- Faulty ignition leads or electrodes
- Gas supply interruption
- Blocked gas valve
- Air in the gas line
- Faulty printed circuit board (PCB)
First, check that your gas supply is functioning by testing other gas appliances in your home. If they're working normally, try resetting your boiler by turning it off for 30 seconds, then switching it back on. If the E4 fault persists, contact a Gas Safe registered engineer as this issue typically requires professional diagnosis and repair.
E5 Fault Code: Gas Supply Issues
The Remeha E5 fault code signals problems with the gas supply to your boiler. This fault requires immediate attention due to its impact on gas safety.
Common Causes:- Gas meter issues
- Faulty gas valve
- Gas supply interruption from your provider
- Blocked gas line
- Incorrect gas pressure
Contact your gas supplier first to confirm there are no area-wide supply problems. If the gas supply is normal, contact Serviceteam's qualified engineers, who can safely diagnose and repair gas valve issues or pressure problems.
E6 Fault Code: Flame Detected When Boiler is Off
The E6 error occurs when a flame is detected despite the boiler being off, typically caused by a faulty Printed Circuit Board (PCB).
Possible Causes: Troubleshooting Steps:Have a heating engineer inspect and, if necessary, replace the PCB.
E7 Fault Code: Air Pressure Switch Problems
The Remeha Avanta Plus E7 fault code indicates issues with the air pressure switch, which monitors proper combustion air flow and flue gas removal.
Typical Causes:- Blocked flue or air intake
- Faulty air pressure switch
- Fan problems
- Condensate blockage
- Wind pressure affecting the flue operation
Check external flue terminals for obstructions such as leaves, debris, or ice formation. Ensure adequate clearance around air intake points. If external checks reveal no obvious blockages, the air pressure switch itself may require replacement by a qualified technician.
E9 Fault Code: No Water in System / Pump Fault
The E9 fault means the boiler detects no water in the system, or the boiler pump isn't circulating water properly.
Possible Causes:- Low water pressure
- Failed pump
- Faulty water pressure switch
Refill the system to correct pressure, ensure the pump is working, then reset the boiler. If the error persists, contact an engineer.
E10 Fault Code: No Flow During Venting
E10 indicates a failure of water circulation during the venting cycle, often due to wiring errors, insufficient water, or airlocks.
Possible Causes:- Wrong pump wiring
- Low water pressure
- Air in the system
Check the system pressure, verify the pump wiring, and bleed the system to remove any trapped air.
E11 Fault Code: High Airbox Temperature
The E11 error indicates that the airbox temperature is too high, typically due to air leakage from the heat exchanger into the airbox.
Possible Causes:- Air leaks from the heat exchanger
This fault requires a heating engineer to investigate and make the necessary repairs.
E13 Fault Code: DHW Flow Switch
The Remeha E13 fault code relates to the domestic hot water (DHW) flow switch, which detects when hot water taps are opened.
Possible Issues:- Faulty DHW flow switch
- Blocked or scaled heat exchanger
- Pump problems affecting water circulation
- Wiring faults to the flow switch
Test your hot water demand by opening taps. If hot water flow is reduced, this may indicate scaling in the heat exchanger. Professional power flushing or component replacement may be necessary to resolve this fault.
E43 Fault Code: Parameter Limits Error
The E43 fault suggests that some boiler automation parameters are outside their allowed limits.
Possible Causes:- Incorrect automation settings
Have a professional check and adjust the boiler settings to bring the parameters back within limits.
E44 Fault Code: Parameter Check
The E44 code indicates the boiler is checking its automation settings and has detected inconsistencies.
Possible Causes:- Incorrect or corrupted parameter settings
Reset the boiler or call an engineer to reprogram the correct settings.
E45 Fault Code: Default Parameters / Faulty Control Unit
The E45 error shows the boiler has reverted to default parameters, often due to a faulty control unit.
Possible Causes:- Faulty boiler control unit
Have the control unit tested and replaced if necessary by a professional.
Professional diagnosis is particularly important because fault codes can sometimes indicate secondary problems. For example, an ignition fault might stem from a failing printed circuit board rather than the ignition system itself. Our engineers' expertise ensures the root cause is addressed, preventing recurring issues.
Preventive Maintenance for Fault Code Prevention
Regular boiler maintenance significantly reduces the likelihood of fault codes appearing on your Remeha Avanta Plus boiler.
Key Maintenance Activities:- Annual boiler servicing and safety checks
- Regular system pressure monitoring
- Flue and air intake inspection
- Condensate drain maintenance
- Radiator bleeding and system balancing
Serviceteam offers comprehensive maintenance contracts for Remeha Avanta Plus boilers, providing priority callout service, annual safety checks, and parts coverage. Our approach helps identify potential issues before they develop into costly breakdowns.
Emergency Boiler Breakdown Service and 24/7 Support
Boiler breakdowns don't follow convenient schedules. Serviceteam provides a 24/7 emergency response for boiler error codes throughout London. Our emergency engineers carry an extensive parts inventory for immediate repairs.
When you contact our emergency service, our experienced team can often provide initial troubleshooting guidance over the phone, potentially resolving simple issues immediately.
Our emergency service covers all London boroughs, with an average response time of under two hours for urgent heating failures.
