Press set and then use the up and down arrows to set temperature 

How do I take childlock off?

Press the plus and minus signs together and 'hold' until you hear a beep

It's very important to follow the diagrams on Page2 of below brochure.

DOWNLOAD BUILDING IN HERE
BFA-Information-The-Building-In-Bible.pdf

These have just one real moving part, an inner fan, if unit has become over noisy it will just be the small inner fan. It is located inside unit and is pretty easy to swap over. There is one in top and one in bottom section.

Part
Fan replacement code BCW-69DD-FAN-TOP, cost $49.00
Fan replacement code BCW-69DD-FAN-BOTTOM, cost $49.00
Please fill out below to start the process.

If unit has stopped cooling there are 3 x things that could cause it;
1. Top or Bottom Inner fan faulty, part number BCW-69DD-FAN-INNER & BCW-69DD-FAN-BOTTOM, price $59, fill in below to arrange.

2. If unit runs but still no chill, the cooling module chip has failed, this is small ceramic chip that can fail over time, especially if unit is installed incorrectly. Part number BCW-69DD-COOLING-MODULE, price $69, fill in below to arrange.

3. Unit doesn't seem to come on at all, this means PCB board has failed,. Part number BCW-69DD-PCB, price is $79, fill in below to arrange.

Parts Summary
Inner Fan, part number BCW-69DD-FAN-TOP, price $59, fill in below to arrange.
Inner Fan, part number BCW-69DD-FAN-BOTTOM, price $59, fill in below to arrange.
Cooling Module, part number BCW-69DD-COOLING-MODULE, price $69, fill in below to arrange.
PCB, part number BCW-69DD-PCB, price is $79, fill in below to arrange.