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Why is my system showing an Expander Module Failure notification?

My System | Troubleshooting

An Expander Module Failure usually occurs when a device, like a panel or cell communicator, is having a problem communicating back to your panel. This is an indication of a wiring issue that will require a service appointment with a Guardian technician.

Please call 1.800.PROTECT (1.800.776.8328) and we will be happy to help. 

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