Finding the correct light bulb was the biggest challenge. I called for assistance and was helped within 5 min. recieved filter and light bulb next day, turned water off at the valve under the sink. unscrewed filter cover in refridgerator and replaced filter, and screwed cover back on. turned water back on and bled air out of the line by openingwater dispenser and filling glass. this took several glasses of water untill all air was out of line. replaced light bulb in door.