If you can take the following photo's and send them to me using the paper clip icon above, on the right end of the tool bar, I can mark them up with trouble shooting and possibly repair instructions depending on your skill sets.
1. Photo of the various parts of the system taken from about 10 feet away at various angles.
2. Photo of the wiring diagram glued onto the back side of one or more service panels.
those need to be well lit, very well focused and taken from close up, and straight on.
3. The model number of the inside unit, and the unit sitting outside and the approximate age of the system.
4. Tell me the name of the closest city and if system cools or heats the house well or not, and if
hot water production is the only problem.
So far I suspect high head pressure due to dirty heat exchangers or a defective high limit switch.
We can go from there without any time limits.