Follow the instructions that came with your mechanical/power bleeder.  Consulting with a professional technician is recommended.

This will take two people to accomplish properly.  First, always start at the corner furthest from the driver and work your way towards the driver/master cylinder (Right rear, left rear, right front, left front.).  Remember farthest to closest.
Then, find the bleeder screw (bleeder

To remove moisture, air, atmospheric dirt, and abrasive metal wear particles from moving parts in the master cylinder and calipers that have entered the system. Brake fluid needs to be replaced periodically because brake fluid will absorb moisture over time which can lower the boiling

When you bleed the brakes this is the procedure for releasing any air or moisture trapped in your brake fluid system.  Flushing or changing your brake fluid consists of flushing the old brake fluid out of the master cylinder, brake lines, and calipers while replacing

Brake fluid is hygroscopic.  Hygroscopic is the ability of a substance to attract and hold water molecules from the surrounding environment. This is achieved through either absorption or adsorption with the absorbing or adsorbing substance becoming physically changed somewhat.   A new bottle is considered “dry”

You most likely have a fluid leak in your brake system or a bad master cylinder.  Another reason for this is you might not have tightened your bleed screw on one or more of your calipers.

A low brake pedal that has to be pumped may be due to a low fluid level and/or air in the lines.

This is most likely the case of improperly bed brake pads.  Once the pads and discs are glazed the amount of friction (bite and torque) is greatly reduced.  This could also be the result of choosing the incorrect brake pad compound for your application.

In most cases this is a result of boiling your brake fluid.  Another of the usual suspects are faulty master cylinder or a leak in either the caliper or the brake lines.

Brake fluid is subjected to very high temperatures.  It must have a high boiling point to avoid vaporizing in the lines. This vaporization is a problem because vapor is highly compressible relative to liquid, and therefore negates the hydraulic transfer of braking force from the