Strong springs attach to oven door hinges and put enough pressure on the closed door to prevent it from allowing any heat loss. The oven cannot maintain a steady temperature once a hinge spring loses the necessary tension. The spring may be inside the oven door hinge itself or in the side panel of the oven cabinet. Springs and other appliance parts are sold by appliance dealers, appliance repair centres and appliance manufacturers' websites.
Turn the power off for an electric oven at the breaker panel. Mark or lock the breaker box until your work is completed. There's no need to shut off the gas when replacing springs for a gas oven door. This work will not place your hands near the pilot light or the dial that starts the oven burner.
Put on sturdy leather work gloves to protect your hands. Oven door springs are firmly tense, and injuries result from manipulating the spring-loaded oven door hinges as well as the springs.
Open the oven door to the first stopping point used for broiling. Pull down on the clips at the top of the hinges with the tip of a flathead screwdriver. Grab the oven door by the sides and pull upward to release the hinges. Pull outward on the door to remove it completely.
Unscrew the bottom plates under the oven door hinges with a Phillips screwdriver if the hinges stayed with the door. Pull the plates off to loosen the hinges. Push the hinges to the closed door position and unlatch the springs from their anchor hooks. Stretch new springs on in place of the old ones. Replace all appliance parts and close the oven door.
Remove the drawer from the bottom of the oven if the hinges stayed with the oven. Remove the springs from their hooks inside the oven cabinet. Place new springs on the hooks. Complete the appliance repair by reattaching all parts.
Replace both springs even if only one is loose or broken. It's very likely the two springs were installed at the same time. Test the tension on the oven door by slipping a piece of paper into both sides of the door when closing it. The closed door should hold the paper firmly in place.