@droftarts

Thank you Ian. Good to know I have the latest firmware.

I will replace the heater wiring as it does look a bit dodgy, and will report back with my findings.

I have a Duet 0.85. I think that I see there are firmware updates for Duet2 and Duet 3.

Is there any firmware updates I can do for this old board?

Firmware Name: RepRapFirmware for Duet
Firmware Electronics: Duet 0.85
Firmware Version: 1.26.1 (2020-02-09b1)
Web Interface Version: 1.22.6

Having weird issues with heater faults and wasn't sure if newer firmware could help.