Weak tension клинового a belt or it is torn
There is not enough liquid in cooling system
The connecting wire to an alarm lamp has connection to weight.
The thermostat remains closed (a radiator cold).
The fan of system of cooling does not work.
The reduktsionnyj valve in запорной to a cover of a compensatory tank the defective.
Connection to weight of the gauge of the indicator of temperature.
The radiator is polluted or plates are damaged.
Check up a tension of a belt or replace it.
Add water, as a last resort, take in system of washing of glasses.
Disconnect a wire of the temperature gauge, the alarm bulb should go out. If is not present, there is a connection with weight; check up a wire lining.
Stop, dismantle the thermostat, continuously check temperature. If necessary tow off the car in a workshop.
Defect in the fan engine, replace. Defect in the temperature gauge. Disconnect a current-carrying wire from the gauge and directly connect to the plug of a wire departing from the gauge.
Check up the valve, check up condensing lining of a cover, if necessary replace запорную a cover.
Thoroughly clean a radiator. Charge this business better to the workshop or the expert.