The Biggest indication that your motor is seized is normally when it does not turn over at all. You would hear the starter kick in trying to turn the flywheel (major gear in the engine) but it will not turn the pistons. There is ways of unseizing it but as any mechanic will tell you, its easier to get a new motor then spending all that time and labor. As well becarful to much over cranked a dead motor will only result in a dead battery very quickly.
To determine if a motor is seized or if the issue lies with the transmission, first check if the engine turns over manually by attempting to rotate the crankshaft with a wrench. If the engine cannot be turned and there are no unusual noises, it may be seized. If the engine turns but the vehicle doesn't move when in gear, the problem is likely with the transmission. Additionally, listening for grinding or slipping noises can help pinpoint the issue further.
Either the motor has a short, or is seized, for some reason.
It will not turn over on the starter motor.
If a pool motor is seized, it means that the motor's internal components, such as the rotor or bearings, are stuck and unable to turn. This can result from factors like lack of lubrication, overheating, or corrosion. A seized motor typically requires repair or replacement, as it can no longer function properly to circulate water in the pool. Regular maintenance can help prevent this issue from occurring.
The tuck will run forever.
It will not turn over.
Transmission fluid is just oil and will not unfreeze a seized engine.
Seized should mean that it's not turning. Crank the engine and see if the alternator pulley spins or not.
Assuming you mean electric motors, the causes for failure include seized bearings and worn brushes. If the bearings or bushings are seized, the motor may fail. Most electric fans have thermal fuses, so if the motor seizes and overheats, the fuse blows. If the brushes are worn, then the motor is no receiving electricity and thus cannot turn.
Take the door apart and disconnect the seized motor from linkage and tape up window and replace motor.
No power to fan, fan motor is burned out, fan motor has seized up, control circuit for fan not working.
If you've pulled the plugs and the cylinders are full of gas, the motor is seized, won't turn at all (have you put a socket & bar on the crank?) then replace the motor with a used/rebuilt one would be the easiest.