How do you check the seal on the oven door?

To check the seal on the oven door, first inspect the rubber gasket around the door for any visible signs of wear, cracks, or damage. Close the door and make sure it seals tightly; you can use a piece of paper or a dollar bill to test the seal by sliding it between the door and the oven body—if it pulls out easily, the seal may be compromised. Additionally, look for any gaps or misalignments when the door is closed. If the seal is damaged, it may need to be replaced for optimal heat retention.