---
title: "Monitor Error: Disconnected from cluster, coordinator is not available"
slug: "monitor-error-disconnected-from-cluster-coordinator-is-not-available"
updated: 2025-09-08T12:09:13Z
published: 2025-09-08T12:09:13Z
canonical: "support.controlup.com/monitor-error-disconnected-from-cluster-coordinator-is-not-available"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://support.controlup.com/llms.txt
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# Monitor Error: Disconnected from cluster, coordinator is not available

For all monitors within your ControlUp Monitor cluster to function correctly, they must be able to connect to the master (management) monitors. Without a connection over TCP port 40706 to the master monitors, an error message will appear on the Monitor Management screen within the Console:

:::(Error) (Error Message)
Disconnected from cluster, coordinator is not available
:::
![Monitor pane displaying Disconnected from cluster, coordinator is not available
 error Message](https://cdn.document360.io/098100b7-b9da-4bea-b4b9-017140ab863e/Images/Documentation/image-KIBGZEFH.png){height="" width=""}

## Solution
Ensure that two-way communication on TCP port 40706 is set up for the monitors. After you've established both inbound and outbound connections over port 40706 with the master monitor, you can use the following PowerShell cmdlet to check the connectivity:
``` powershell
Test-NetConnection -ComputerName 8-8Monitor.Version8Tech.com -Port 40706
```
![Test-NetConnection PowerShell cmdlet output results](https://cdn.document360.io/098100b7-b9da-4bea-b4b9-017140ab863e/Images/Documentation/image-XZY02K2F.png){height="" width=""}