We are here to simply connect you with the right supplier who handles your window and door warranty. Check to see if your windows qualify for warranty first by finding the number marked on your window/door (usually found near the bottom corner of the frame) Once you have your number/code, you can continue by selecting your window/door manufacture – if either Milgard or Andersen click on the link to their site and input your number into their warranty system to complete the process.