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6. Trouble shooting
Malfunction
Ventilator and heater do not work
Ventilator does not work
Ventilator does not work
Heater does not work
Cause
Power failure
Mechanical obstruction
Electrical failure
Resistor defective
Check
Check 12 VDC and/or mains voltage
Clean filter and/or remove obstruction
Check fan impedance ~30 Ω
Measure power resistors:
Specifications: 15 Watt and 50 / 39 Ω
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