Conveyor dishwasher with at least two treatment zones (100, 200), a main washing zone and a rinsing zone, and with a transport device by means of which the items to be cleaned may be transported at a transport speed V through the at least two treatment zones (100, 200), wherein the conveyor dishwasher comprises a tank for accommodating a washing liquid which is used for the treatment in the main washing zone, and a boiler for accommodating rinse water which is used for the treatment in the rinsing zone, and wherein the conveyor dishwasher comprises a heating device for the tank to heat the washing liquid and a heating device for the boiler to heat the rinse water, wherein a temperature sensor is arranged in the tank, which temperature sensor measures the temperature TT of the washing liquid in the tank, and another temperature sensor is arranged in the boiler, which temperature sensor measures the temperature TB of the rinse water in the boiler, wherein a fixed or user adjustable target transport speed VSOLL is assigned to the transport device, and wherein a fixed or user adjustable target temperature TTSOLL is assigned to the washing liquid located in the tank and a fixed or user adjustable target temperature TBSOLL is assigned to the rinse water located in the boiler, characterized in that the conveyer dishwasher comprises a controller (50, 52) which is designed such that the transport device is moved at the target transport speed VSOLL (V=VSOLL) when both the temperature TT of the washing liquid is greater than or equal to the target temperature TTSOLL and also the temperature TB of the rinse water is greater than or equal to the target temperature TBSOLL, and the controller (50, 52) of the conveyor dishwasher is further designed such that the transport speed V is set to a value less than the target transport speed VSOLL (V<VSOLL) when one or both of the following conditions are met: - the temperature TT of the washing liquid in the tank is lower than the target temperature TTSOLL by at least one defined temperature difference ΔTX (TT<TTSOLL-ΔTX), - the temperature TB of the rinse water in the boiler is lower than the target temperature TBSOLL by at least one defined temperature difference ΔTY (TB<TBSOLL-ΔTY). wherein a temperature sensor is arranged in the tank, which temperature sensor measures the temperature TT of the washing liquid in the tank, and another temperature sensor is arranged in the boiler, which temperature sensor measures the temperature TB of the rinse water in the boiler, wherein a fixed or user adjustable target transport speed VSOLL is assigned to the transport device, and wherein a fixed or user adjustable target temperature TTSOLL is assigned to the washing liquid located in the tank and a fixed or user adjustable target temperature TBSOLL is assigned to the rinse water located in the boiler, characterized in that the conveyer dishwasher comprises a controller (50, 52) which is designed such that the transport device is moved at the target transport speed VSOLL (V=VSOLL) when both the temperature TT of the washing liquid is greater than or equal to the target temperature TTSOLL and also the temperature TB of the rinse water is greater than or equal to the target temperature TBSOLL, and the controller (50, 52) of the conveyor dishwasher is further designed such that the transport speed V is set to a value less than the target transport speed VSOLL (V<VSOLL) when one or both of the following conditions are met: - the temperature TT of the washing liquid in the tank is lower than the target temperature TTSOLL by at least one defined temperature difference ΔTX (TT<TTSOLL-ΔTX), - the temperature TB of the rinse water in the boiler is lower than the target temperature TBSOLL by at least one defined temperature difference ΔTY (TB<TBSOLL-ΔTY). - the temperature TT of the washing liquid in the tank is lower than the target temperature TTSOLL by at least one defined temperature difference ΔTX (TT<TTSOLL-ΔTX), - the temperature TB of the rinse water in the boiler is lower than the target temperature TBSOLL by at least one defined temperature difference ΔTY (TB<TBSOLL-ΔTY).