Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to preheat a convection oven [title] Read the oven's instruction manual. [step] Convection oven models are different and these steps may differ from the model that you own. Look for the owners or instruction manual that you got with your convection oven.

Ending1: You can confirm the model by reading the interior of the unit. [substeps] The interior of a convection oven is where much of the heat is generated. Ending2: If you don't have it, use a search engine to see if you can find an online version of the manual. [title] Press the convection button or turn the dial to convection. Ending3: It should tell you how to preheat your oven. [substeps] If you don't have a manual refer to the manufacturer's manual. Ending4: Make sure to read the manual so that you can make sure it will let you preheat it. [substeps] Check the manual to see if you have a problem keeping the oven from preheating too suddenly or preventing the temperature from rising too quickly.

Answer format: ending1/ending2/ending3/ending4