Vokera Return Sensor / Thermistor Short Circuit

Code 08 appears, furnace may overheat or shut down unexpectedly

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.

Possible Causes

Shorted return NTC sensor, Water ingress in connector, Damaged cable insulation

Safety: Switch off power before working on the unit.

Check return sensor: Disconnect the return NTC sensor plug and inspect for moisture or corrosion. Dry and clean as needed.
Inspect cable: Look for crushed or cut sections of the cable. Repair or replace as necessary.
Measure resistance: A near-zero ohm reading indicates a shorted sensor. Replace with the correct Vokera return NTC.
Reset and test: After replacement, reset the furnace and monitor operation.

Medium 3/5

Return NTC Temperature Sensor

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