CAUSE   |   SOLUTION   | 
  Do not rotate the fan heater   | 
|   Blown fuse of the fan motor.  |   Check the fuse of the fan, if necessary - replace.  | 
|   Defective fan switch.  |   Check the voltage supplied to the motor of the fan.  If not, remove and check the circuit breaker.  | 
|   Faulty motor.  |   Replace the fan motor.  | 
  Heating fan is not rotating at a speed steps   | 
|   Faulty additional resistance  |   Replace the additional resistance.  | 
  Too small heating capacity   | 
|   Too low coolant level  |   Check the coolant level, if necessary - add coolant.  | 
|   Do not open the heating valve  |   Check the solenoid valve in the system water access, make passable.  | 
|   Leaking or clogged heat exchanger  |   Replace heat exchanger (Work for the repair shop).  | 
  The heated air has a sweet smell, when the heating misted glass   | 
|   Leaking heat exchanger  |   Check the cooling system for leaks.  Replace heat exchanger (Work for the repair shop).  | 
  The noise when the fan heater   | 
|   Pollution fan  |   Remove the fan, clean the air channel.  | 
|   The imbalance of the impeller, bearing failure  |   Remove the fan motor and check for ease of rotation.  |