When the braking friction material separates from the brake shoe, the material can get jammed on the drum.
This can make the rotor difficult to remove.
Wheel bearing noises can be ruled out by driving the vehicle and swerving left to right. See if the noise changes.
The wires go to a heater element in the t-stat housing. The heater heats up a wax pellet which closes the t-stat to make the engine run "hotter" under certain conditions.
So, with the wires not connected the t-stat would operate normally.
I haven't tested both options. So I can't say 100% you...
That's the wrong thermostat.
The wires are for the electronically controlled thermostat.
There's an internal heater to control the thermostat.
To answer your question. You should be ok with the one you installed.
The compressor does stop when the desired pressure is reached.
If that fitting is leaking, the compressor will keep running.
If you need the fitting, I can send you one. Free.
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