Short of a few very minor repairs, such as replacing a light bulb in an oven, appliance repair is rarely a good DIY job. Most repairs require mechanical expertise and can damage an appliance if done improperly.
It's also important to know that attempting to repair an appliance can result in safety hazards. Even if you manage to accomplish the repair with no issues, problems from improper repairs could arise later.
Lastly, attempting DIY repairs on an appliance will void the warranty. Hiring a professional appliance repair service can ensure your warranty remains valid. What's more is the repair may even be covered by your warranty.