Viessmann Error Code 04: The Viessmann Boiler’s Error Code 04 means that the burner control switches to lockout. This happens when the fan speed is either too high or too low when the boiler starts. The lockout is a safety feature that prevents the boiler from operating when there is an issue with the fan speed. If the fan speed is too high, it can cause excessive heat and potentially damage the boiler. On the other hand, if the fan speed is too low, it may not provide enough air for proper combustion, leading to inefficient heating. It is important to address this error code promptly to ensure the safe and efficient operation of the Viessmann Boiler.
Viessmann Boiler – Error Code 04
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Viessmann Boiler – Error Code 04
Is your Viessmann boiler showing up with Error Code 04 on the screen? In this article, we’ll look at why it is happening, some potential next steps for fixing error code 04 and whether you should keep using your Viessmann boiler.
What is a Viessmann Error Code 04?
The Viessmann Boiler’s Error Code 04 means that the burner control switches to lockout. This happens when the fan speed is either too high or too low when the boiler starts. The lockout is a safety feature that prevents the boiler from operating when there is an issue with the fan speed. If the fan speed is too high, it can cause excessive heat and potentially damage the boiler. On the other hand, if the fan speed is too low, it may not provide enough air for proper combustion, leading to inefficient heating. It is important to address this error code promptly to ensure the safe and efficient operation of the Viessmann Boiler.
Recommended solution/fix steps
If you encounter Error Code 04 on your Viessmann Boiler, which indicates that the burner control has switched to lockout due to the fan speed being too high or low at start, follow these steps to address the issue. First, turn off the boiler and allow it to cool down. Check the fan for any obstructions or debris that may be affecting its speed. Clean or remove any blockages if necessary. Next, inspect the fan motor and its wiring for any signs of damage or loose connections. Tighten or repair as needed. If the issue persists, it is recommended to contact a qualified technician or the manufacturer’s customer support for further assistance and potential repairs.
Fault codes that are often associated with or mistaken for error code 04 are: .
01, 02, 05, 08, 06, 41, 42, 45, 48, 46
Can I still use my Viessmann boiler?
After encountering Error Code 04 on a Viessmann Boiler, the machine cannot be operated until the issue is resolved. This error indicates that the burner control has switched to lockout due to the fan speed being either too high or too low during startup. The lockout is a safety feature that prevents further operation until the problem is addressed. To ensure the boiler’s proper functioning and prevent any potential damage or hazards, it is necessary to troubleshoot and rectify the fan speed issue. Professional assistance may be required to diagnose and fix the problem, ensuring the machine can be safely operated again.
