B0601low severityBody
Blower Motor Resistor Circuit
on 1997 Volvo 850 2.4L I5 · FWD
What this code means
Malfunction in the blower motor resistor or speed control module. The resistor controls blower speed at lower settings.
Symptoms
- Blower only works on highest speed
- No blower at low/medium settings
- Blower speed inconsistent
Common causes
- Faulty blower resistor
- Thermal fuse in resistor blown
- Corroded resistor connector
- Excessive current from failing blower motor
Diagnostic steps
- Test blower resistor resistance at each tap
- Check thermal fuse continuity
- Inspect resistor connector
- Measure blower motor current draw
Repair notes
Replace blower motor resistor. If resistor keeps failing, check blower motor current draw as a failing motor can burn resistors.
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