No airflow from vents
Set fan to high, no air comes out of any vent.
R107 has a single blower motor under the cowl, controlled by the ACC system. The blower regulator (a power transistor) is a known weak point.
What the diagnosis checks
- Any speed work, even briefly?
- Reach in under the dash — does the blower wheel spin freely by hand?
Possible causes it points to
- Blower regulator (transistor)
- No power to blower motor
- Blower motor seized
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