| Sign  | Plausible reason | Elimination method  | 
 
 | There is no air stream | The fan engine does not work | Check up an electric feed circuit of the engine | 
 
 | The fan engine works | Check up following elements: 
 – Channels of giving of air are hammered;
 – The fan exit is hammered;
 – The radiator of a heater or a hose is hammered;
 – It is faulty air заслонка;
 – The management cable is faulty.
 | 
 
 | Insufficient stream нагретого air | Speeds of work of the fan do not change | Check up an electric feed circuit of the engine | 
 
 | The fan works properly | Check up following elements: 
 – Channels of giving of air are hammered;
 – The fan exit is hammered;
 – Wrong position air заслонки.
 | 
 
 | The compressor does not join even thus that the condenser fan works | Check up an electric feed circuit of the engine | 
 
 | The compressor and the condenser fan do not join | Check up electric feed circuits of engines | 
 
 | Only the condenser fan does not join | Check up an electric feed circuit of the engine |