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Casey CruzAug 30, 2025
What does error E.04.00 mean on my REMEHA Gas 220 Ace 300 Boiler and how do I fix it?
- Mmichael38Aug 31, 2025
If your REMEHA Boiler displays error code E.04.00, the solution is to replace the CU-GH.
What does error E.04.00 mean on my REMEHA Gas 220 Ace 300 Boiler and how do I fix it?
If your REMEHA Boiler displays error code E.04.00, the solution is to replace the CU-GH.
What does error E.04.17 on REMEHA Gas 220 Ace 300 mean?
If your REMEHA Boiler displays error code E.04.17, it indicates a gas valve unit fault. This could be due to a bad connection, so check the wiring and connectors. If the gas valve unit itself is faulty, replace it.
What does error E.04.250 mean on my REMEHA Gas 220 Ace 300 Boiler?
If your REMEHA Boiler displays error code E.04.250, it indicates an internal error. To resolve this, replace the PCB.
What does error E.02.47 mean on my REMEHA Gas 220 Ace 300?
If your REMEHA Boiler displays error code E.02.47, indicating that a function group was not found, try to carry out an auto-detect. If the problem persists, restart the boiler or replace the CU-GH.
What does error E.02.15 mean on my REMEHA Boiler and how can I fix it?
If your REMEHA Boiler displays error code E.02.15, indicating a CSU timeout, check the wiring and connectors for any bad connections. If the connections are secure, the CSU may be faulty and need replacement.
What does error E.01.12 mean on my REMEHA Gas 220 Ace 300 Boiler?
If your REMEHA Boiler displays error code E.01.12, indicating flow and return are reversed, check the wiring and connectors for bad connections. Ensure water circulation is in the correct direction by checking the circulation (direction, pump, valves). Also, verify that the sensor has been fitted correctly and check the Ohmic value of the sensor. If the sensor is faulty, replace it.
What to do if REMEHA Gas 220 Ace 300 shows error E.04.01?
If your REMEHA Boiler is showing error code E.04.01, it indicates that the flow temperature sensor is short-circuited. This could be due to a bad connection, so check the wiring and connectors. It may also be due to an incorrectly fitted sensor, so check that the sensor has been correctly fitted. If these steps don't resolve the issue, the sensor itself may be faulty and require replacement.
What does error E.04.02 mean on a REMEHA Gas 220 Ace 300 Boiler?
If your REMEHA Boiler displays error code E.04.02, it indicates that the flow temperature sensor is open. This may be due to a bad connection, so check the wiring and connectors. If the wiring is intact, the sensor itself may be faulty and require replacement.
What does error E.04.04 mean on my REMEHA Boiler?
If your REMEHA Boiler displays error code E.04.04, it indicates that the flue gas temperature sensor is short-circuited. This could be due to a bad connection, so check the wiring and connectors. It may also be due to an incorrectly fitted sensor, so check that the sensor has been correctly fitted. If these steps don't resolve the issue, the sensor itself may be faulty and require replacement.
What does error E.04.05 mean on my REMEHA Gas 220 Ace 300?
If your REMEHA Boiler displays error code E.04.05, it indicates that the flue gas temperature sensor is open. This could be due to a bad connection, so check the wiring and connectors. It may also be due to an incorrectly fitted sensor, so check that the sensor has been correctly fitted. If these steps don't resolve the issue, the sensor itself may be faulty and require replacement.
Key safety guidelines for installers and users, covering gas and flue gas hazards.
Detailed safety warnings and precautions related to installation and use.
Requirements for installers and guidelines for selecting a suitable installation site.
Steps for connecting heating circuit, condensate drain, and ensuring proper water flow.
Procedures for safely connecting the gas supply pipe and ensuring tightness.
Guidelines for selecting and connecting air intake and flue gas exhaust systems.
Instructions for wiring, control unit, panel assembly, and connection box installation.
Step-by-step guide for initial startup, language selection, and boiler setup.
Adjusting gas type, fan speeds, and checking combustion (O2/CO2) for optimal performance.
Overview of configurable parameters, their codes, descriptions, and ranges.
Step-by-step guide on how to navigate menus and modify boiler settings.
Routine checks including water pressure, quality, ionisation current, combustion, and pressure switches.
Explanation of warning, blocking, and lock-out error codes and their potential causes.
General