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Adding in 100 degree temps, need larger gauge copper to lessen the voltage drop on the in-rush current. Solar energy the same deal. Several factors need visited to upsize the wire. Cheap insurance over time.

What I've read about hard starts is you have more available current to turn the compressor over from a dead stop, allegedly, over time, will burn the compressor windings out. Mine with the 5-2-1 hard start sure fires faster and easier "audibly", at my house. Again for the above reason, you...

Rust converter, primer and good outdoor UV rated house paint. Full gloss if you can find it.

I do not size the wire for the running ampacity only. Usually double or triple that figure depending on tonnage. Why? Compressor is the largest amp draw in the outdoor unit. She will turn over easier and quieter with a larger ga copper whip. Makes the compressor last longer. Use lamp cord if you...

That compressor has a 92 amp locked rotor rating. Meaning she pulls 92 amps of in-rush current trying to turn the compressor over from a dead stop. The guy saying go down to 12ga wire should be ignored.

Seeing 15.4 run load amps on compressor tag. Half of a 30 amp breaker. Something is wrong. Putting a 35 amp breaker in should be your last effort. Fix the problem first before throwing parts at it. Possible leg off the compressor shorting or close to a short.

Did this just happen OR was it from day one when the system was new?

KILL or OPEN the disconnect or breaker. Measure for AC voltage present. Kill ALL power. Open up the compressor winding power wires. Look for one of the 3 legs shorting out or low Ohms. Make sure ALL connections are tight. Use an AC clamp amp meter and test the running draw across the three...

I recommend those 5-2-1 hard start kits. Dropped my electric bill down around 20 bucks per month on a 5 ton compressor. Helped mine start faster and easier. This is what you REALLY need with your erratic start/no-start ups. That 54 amps is your in-rush current. Could be you need to clean up...

Yes, if the windings are shorted or close to a short.

Many a factor for sure. Most houses the return is too small.

Not at my house. Prefer more of a quality repair. Buy what you like.

In humid areas, wise to say install a 4 ton to help pull moisture out.

Also the old blower wheel was probably NEVER cleaned and packed full of dirt. Causing less air flow through the house. Running longer pulling more humidity out. Old refrigerant charge was probably not perfect on the old unit. Many a factor that could cause this. Clogged air filters or people...

How long do they last? Heard 3-5 years. Are these fire hazards ran in the attic?

Anyone use that heat tape to keep the pipes from freezing? Specifically on PEX A pipe? Curious how much heat actually gets into the plastic pipe to do what it is to do? Guessing you tape it down then insulate right? Is it even safe for PEX pipe? Not going to burn into the pipe?

Some of these are not UV rated. Read the label before buying.

Remember copper is king. Best in flow, highest cost and longevity. Copper has a 50 year service life. PEX, all I've seen is a max of 25 years.

No clue.

Modern brass is not brass anymore. All the good lead is gone. Yes it adds more of a battle in sweating. More cleaning and such. Use lead free solder and flux for lead free solder. That tinning flux is good for DIY people.