Viadrus
Intermittent Overheat or Electrical Interruption
Furnace shuts down randomly without an error code, then restarts after a while.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Loose electrical connection on Viadrus control board, Intermittent safety thermostat, Overheating due to poor ventilation, Faulty power supply relay
How to Fix / Troubleshooting
Safety: Turn off power before tightening connections.
- Check ventilation: Ensure the furnace room has adequate ventilation openings as specified by Viadrus. Remove stored items blocking air inlets.
- Tighten terminals: Inspect and tighten all screw terminals on the control board and power terminal block.
- Inspect thermostats: Lightly tap safety thermostats and observe if the furnace trips. Replace any that are mechanically unstable.
- Monitor temperature: Use the diagnostic menu to monitor flow temperature. If it spikes before shutdown, circulation or sizing issues may need professional attention.
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Repair Difficulty
Medium
3/5
Required Part
Manual Reset Safety Thermostat
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