AnswerYes, you can actually fix the door yourself. I would suggest talking to someone at your local hardware store before doing so, though, in order to figure out how to do it. And there are shops out there who offer online payment and delivery of patio doors- you just need to ask your salesperson to see if your store offers this.

AnswerYou could either browse sales online for reviews of furnace brands, or ask your friends and family if they know about certain brands, and what they recommend to you.

AnswerLowe's usually has that sort of thing you might check with them or home depot is another source to check and both of them have websites you can check to be sure.