Dead node, neighbour list fails

[codenamejames 0]

I have an issue with dead nodes

 

1. I have a HCL located downstairs, and a number of Aeotec MultiSensor 6 units spread around the house. All Aeotec Multisensor 6 units are USB powered (no battery devices).
2. In one room upstairs (approx 8m from the HCL, but through a number of walls), I have an Aeotec MultiSensor 6 and an Aeotec Switch. The Aeotec MultiSensor 6 is meant to read the temperature of the room, be linked to the Aeotec switch, which is connected to a heater. The Aeotec MultiSensor 6 is meant to control the heater. However, the Aeotec Switch regularly dies after turning the heater on, which causes the heater to continually heat the room (30 deg and rising!).
3. I have tried:
   1. waking up the Aeotec switch node, once it dies. This is not a long-term solution. I can't code the excellent scripts to do this, as I have an HCL (only block scenes). 
   2. using a fibaro multi sensor as a range tester in the upstairs room. The results are strange. They are somewhere between direct connection to the HCL and connected via a repeater.
   3. I have tried an entire remesh. This did not solve the issue.
   4. When I remesh individual devices in the room, strange(r) things happen:
      1. The Aeotec MultiSensor 6 is a master device bundled with 'sub-devices' that provide temperature, humidity, lux, UV, motion information.
      2. On the suggestion of another forum user, I tried remeshing a nearby 'good' device - the Aeotec MultiSensor 6. 
      3. When I remesh the temperature sensor of the Aeotec MS6, I get: [12:52:50] 87: Requesting neighbor list from the node is in progress [12:52:57] 87: New neighbor list received (GOOD)
      4. However, when I remesh the humidity sensor of the Aeotec MS6, I get:  [12:52:50] 87: Requesting neighbor list from the node is in progress [12:52:57] 87: Getting new neighbor list failed  (NOT GOOD. How can a sub-device that is part of the same overall sensor not find neighbours when the other sub-devices do?)
      5. Similarly, when I remesh the Aeotec Switch (the device with the issues, apparently), I get the message 'Getting new neighbor list failed'
      6. However, the  Aeotec Switch also has two sub-devices, an ammeter (current sensor) and volt meter. When I remesh the volt meter, I get 'New neighbor list received' (GOOD), but when I remesh the ammeter, I get 'Getting new neighbor list failed' (BAD). How can a sub-device that is part of the same overall switch not find neighbours when the other sub-devices do? - same issue as above.
4. I would be grateful for any advice or assistance in trouble shooting the dead node Aeotec Switch, and any suggestions with remeshing.

 

Many thanks in advance