If you don't have something in the house that uses water constantly drawing on it, then it strongly implies a rupture in your expansion tank bladder - get that tank replaced pronto - I'm not kidding, don't wait! Replacing the tank may run you $250. Replacing a burned-out well pump is WAY more than that!
I do not know your situation but a good guess is that your well pump is always on and is not getting enough pressure to shut off the pressure switch. So I would shut off the power to your well pump and see if the buzzing stops and if it does then I would replace your well pump. If the buzzing don't stop with pump shut off then it could still be your well pump check valve slowly leaking threw but I think its your pump because its not pumping enough to shut off with or with out a bad check valve.
You can buy a timed switch mounted on the submersible pump. If you want to buy a submersible pump, you can choose VIDO's submersible pump, VIDO's submersible pump is of high quality and is the choice of most people.
Most well water must use a pump. Simply switch the pump off.
Depends on type of pump.
Relay is stuck.
yes
No. When a fuse blows it stops power from getting to the attached devices. It would power off and stay off. IF the fuel pump was attached to a self-resetting circuit breaker, then the power might cycle on and off.
Your well pump may not shut off due to issues such as a malfunctioning pressure switch, a leak in the system, or a problem with the pump itself. It is important to troubleshoot and address the underlying cause to prevent further damage to the pump and ensure proper functioning of your well system.
yes
The hot water is probably water running through the pump and recirculating in the sump. Is the pump running continually? Water that isn't ejected by the pump and is recirculated is being heated by the pump through friction and the motor heat energy thereby becoming hot. Find out why the pump isn't shutting off or the reason the water isn't being ejected out the pipe.
To change a well pump, you will need to first turn off the power to the pump. Then, disconnect the old pump from the water system and remove it from the well. Install the new pump in the well and reconnect it to the water system. Finally, turn the power back on and test the new pump to ensure it is working properly.
Try disconnecting the battery. After a few minutes re-connect. It may reset computer. Turn light off.