Honda accord 2006

I’m assuming you got either the factory original ceramic brake pads or at least a decent quality aftermarket ceramic brake pad, not some cheapo semi metallic brake pad, such as Duralast or Raybestos PG’s.

When you replaced them did you properly lube the metal to metal contact points on the calipers? Remember, the pads have to be free floating, otherwise they will not properly engage and disengage from the rotors.

Did possibly some of the caliper lube get on the friction part of the brake pads? Whoops, no friction then. It happens, solution is buy another set, sorry.
Did you bleed all four brakes? Even though the system was not “Opened”, guess what, it already was every time you touch your brakes. The extreme heating and cooling during normal brake operations, even more so on Antilock Braking Systems (ABS ), sucks in moisture through those rubber brake lines and various other connection points. That’s the first reason why you do a quick bleed of the system. The second is to balance out the four wheel braking abilities, if you don’t, as the front wheels start to slow faster then rear, the ABS system releases the front brakes to maintain control.