---
title: "Internal System Fan Replacement"
canonical: "https://docs.infoblox.com/space/IIGFIAIA/14385252/Internal%20System%20Fan%20Replacement"
format: markdown
---
System fans are field replaceable units. Should a CPU fan assembly fail, an alarm that includes the number of the failed fan will be raised by the system. No tools are necessary for fan replacement.  
 System fans are hot-swappable; they can be replaced while the system is on. Infoblox recommends that the system be switched off before replacing a fan unit. To replace a processor fan assembly, do the following:

1. Perform a full system shutdown.
2. Unplug all power cables from the system.

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**Note**: Steps #1 and #2 are optional but are recommended.

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3. Extend or remove the system from the rack.

4. Use the bundled star screwdriver to unscrew the latch (on the top rear of the unit) and gently pull the latch to remove the top panel, as shown in *<span style="color: #0000ff">[Figure 16](#InternalSystemFanReplacement-bookmark67)</span>*.

  
 > Macro (anchor)

*Figure 16* *Gently* *pull* *latch* *to remove* *top panel for Infoblox-4030/Infoblox-4030-10GE*   
   
> Macro (inline-media-image)



5. Slide the top panel off and visually inspect the fans to determine which unit has stopped spinning and must be replaced.

<span style="color: #003366">[6.](#InternalSystemFanReplacement-bookmark68)</span>*<span style="color: #0000ff">[ Figure 17](#InternalSystemFanReplacement-bookmark68)</span>* shows a four-fan-module configuration. The system fans can be removed from their installation base and replaced. A pair of small handles reside on the top of each fan module, which you grasp with fingertips when pulling the unit out of the system. Pay attention to unit alignment and placement before removing from the system.

  
 > Macro (anchor)

*Figure 17* *System fan* *assembly* *for Infoblox-4030/Infoblox-4030-10GE; pull gently* *on* *top* *of* *the* *failed fan unit.* *Each* *unit is numbered.*   
 

![image](media://b250b18c-3e5c-47d1-8065-60c7e2156e1d)

7. Place the new fan in the system. Note that the fans can be installed correctly in only one direction, as shown in *<span style="color: #0000ff">[Figure 18](#InternalSystemFanReplacement-bookmark69)</span>*.

  
 > Macro (anchor)

*Figure 18* *Fan* *blades point* *towards* *rear* *of* *chassis for Infoblox-4030/Infoblox-4030-10GE*   
    
 > Macro (inline-media-image)



8. Replace the top lid of the system and replace it in the rack before restoring power.