> Source: [sk132853](https://support.checkpoint.com/results/sk/sk132853)

# sk132853 - Chassis fan working at full speed on Scalable Platform Chassis

| Property | Value |
|----------|-------|
| Solution ID | sk132853 |
| Date Created | 2018-07-27 |
| Last Modified | 2020-05-18 |
| Technical Level | Advanced |
| Products | Scalable Platforms |
| Versions | R82, R81.20 |
| OS | Gaia |
| Platform | 41000 (EOL), 44000, 64000 |

## Symptoms

- * Chassis fan working at full speed on Scalable Platform Chassis.
* The blue led of the fan is on.
* The messages file contains:  
  "asg_send_alert: \[X_X\] Chassis X Fan X speed has exceeded its threshold (current speed 15, high threshold 11)"
* All fan outputs show high speed of the fans, for example:   
  \[Expert@hostname-ch02-01\]# asg_chassis_ctrl get_fans_status  
  Getting chassis fans speed  
  fan #1 -\> Health: 1, Speed Level 15 (out of 15)  
  fan #2 -\> Health: 1, Speed Level 15 (out of 15)  
  fan #3 -\> Health: 1, Speed Level 15 (out of 15)  
  fan #4 -\> Health: 1, Speed Level 15 (out of 15)  
  fan #5 -\> Health: 1, Speed Level 15 (out of 15)  
  fan #6 -\> Health: 1, Speed Level 15 (out of 15)  
  fan #7 -\> Health: 1, Speed Level 15 (out of 15)  
  fan #8 -\> Health: 1, Speed Level 15 (out of 15)  
  fan #9 -\> Health: 1, Speed Level 15 (out of 15)

## Cause

The fan tray is in a hot swappable state.

In such a state, the chassis detects one of the fans as not being present, and automatically sets all fans to full speed.

## Solution

This solution requires authentication. Please log in to view the full solution.

---

# Agent Instructions

This content is from the Check Point Support Center (https://support.checkpoint.com), the official knowledge base for Check Point cybersecurity products.

## Navigating This Knowledge Base

- **Complete index**: [llms.txt](https://support.checkpoint.com/llms.txt)
- **All SK articles**: [SecureKnowledge Sitemap](https://support.checkpoint.com/sitemaps/secureknowledge-sitemap-index.xml)
- **SK article URL pattern**: `https://support.checkpoint.com/results/sk/{skId}`
- **Markdown responses**: AI bot User-Agents automatically receive `text/markdown` content