Self-cleaning oven

A conveyor oven comprising:

• an oven chamber in which food is cooked;
• a conveyor moveable to convey the food through the oven chamber;
• a gas burner to generate a heat output to the oven chamber, the gas burner having an adjustable gas flow rate;
• a combustion blower for supplying air to the gas burner, wherein the combustion blower generates a combustion blower airflow rate;
• first and second air-circulating blowers to circulate air within the oven chamber, wherein each of the first and second air-circulating blowers operates between at least two different positive air-circulating speeds and each of the first and second air-circulating blowers is separately adjustable to create different heating zones in the oven chamber;
• a temperature sensor within the oven that generates temperature signals indicating an oven temperature;
• and
• a controller that
• receives the temperature signals generated by the temperature sensor, and
• in response to the received temperature signals indicating a change in oven cooking temperature is configured to set the combustion blower airflow rate from a first positive airflow rate to a second positive airflow rate to maintain a continuous positive combustion blower airflow rate while food is being cooked, and
• is configured to set the air-circulating speed of at least one of the first and second air-circulating blowers from a first positive air-circulating speed in a first mode of operation during operation of the oven at less than a cooking temperature to a faster second positive air-circulating speed in a programmable period of time for cooking in a second mode of operation, and
• wherein during the programmable period of time the temperature of the oven chamber is increased from the first mode of operation to the second mode of operation.