If it is only working some times then yes this is most likely a short. However, the issue is most likely on the circuit board of the cluster so having seen this a number of times, I would go ahead and replace it.
Here is a guide on how to replace the cluster on a similar model:
I attached below the process on how to replace the cluster from the manual below. Let us know if you have questions. Thanks
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Tuesday, December 22nd, 2020 AT 6:47 PM