Same breaker has tripped every day in the early a.m. at same time for 4 days. Once reset, it stays on until same time in the a.m. and then trips again. Replaced the breaker. What am I missing? I plugged in and turned everything on in house systematically to see if breaker would trip in the afternoon and nothing happened. Replaced old surge protectors and 3 receptacles. Breaker still is tripping.

 

Is it a regular circuit breaker opposed to one that is a GFCI or AFCI - does it have a reset button on it.

Also, not knowing your skill level how comfortable are you working inside of a panel. If you have never done so then fine - don't. If you have maybe switching the lead hot wire going to this circuit breaker to another circuit breaker of the same kind (matching amp rating). Seeing if this same issues happens again. Trying to eliminate the fact that maybe the breaker is going bad (but unlikely), breakers don't normally go bad easily.

Also is it possible that this circuit services an appliance of pump or something like that that may be in a timer?

 

As AFJES noted, important to know exactly which circuit it is and what devices are on that breaker. Start there and narrow it down.

 

It seems to me that something is turning on at 4 am and tripping the breaker.

 

Usually, it's something turning on at 4am as joed mentioned. Coffee maker, pool pump, outdoor lights, etc.

But could be something more complicated too. Worked somewhere a while back that had an electronic lighting system that went haywire every Wednesday evening. Looong story short, issue was possibly traced back to the power company doing some kind of generator switching likely causing some weird harmonics that messed with a poorly grounded/bonded system.

Granted, your situation is probably more benign than that, but starting point is to figure out what's connected to that breaker and disconnecting all of it or some of it and see what happens the next day.