The nec does not require that the vent fan have gfci protection.
Gfci switch for bathroom fan.
Wiring a gfci outlet electrical question.
Gfci combo switch and outlet wiring circuit diagrams and installation.
The bottom line while older bathrooms were often served by one 15 amp circuit a new or remodeled bathroom generally requires at least two circuits a 15 amp or 20 amp general lighting circuit and a 20 amp outlet circuit.
I have the same problem with a square d homeline gfci breaker and a ceiling fan.
The current set up is as follows.
In this video i show how i installed light fixtures a triple switch and a gfci outlet in my master bath remodel.
Removing existing wiring i removed the 2 wire with ground from the switch to fixture and replaced it with a 3 wire with a ground.
The light fixtures include two led recesse.
Wall 3 speed switch will trip the breaker sometimes but not others.
In many homes necessary circuit breakers and gfcis are already installed but they can stop working unexpectedly so it is important to know how to replace gfci outlets when this happens.
I have everything down to the studs.
A double switch set up on for the ceiling light one for the light above the mirror.
As discussed before gfci also known as ground fault circuit interrupter is a protection device against electric shock which detects the ground faults and leakage currents especially in outdoor and watery areas such as bathroom kitchen laundry etc.
Ground fault circuit interrupters gfcis have long been required in bathrooms but since 2014 the nec has required arc fault circuit interrupter afci protection in every lighting and outlet branch circuit in the house which includes the bathroom.
Seems to depend on how slow or quick the knob is turned from one setting to the next usually trips between speeds if turning knob too slow.
After my bathroom addition was rough wired and before the insulation was done i decided to add a ceiling fan and light to be controlled with separate switches in place of a simple light fixture.