Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: What is a hard start kit, what does it do and why is it needed?
Document: My A/C went out during the hottest week of this year (2013) and I needed a fix. I had a service technician come out and tell me the problem was my compressor is failing but he could install a &#34;hard start&#34; kit for $350 or I could purchase a new compressor for about $2200. Well, I said thanks for stopping by and letting me know the issue.
I would recommend that anyone who wants to install a hard start kit avoid the two wire kits. All the reading I did indicates that over the long haul they are trash. Spend a few extra bucks and get this kit. It works great.BTW, My unit is a 2.5 ton residential unit.
This kit is great for any type compressor (scroll or reciprocating). Easy to install & will not harm compressor windings because of the lower capacitor rating (88-108uf). (If you need a Hard Start kit to try to free a stuck compressor you will need a kit with a much higher uf rating.) This kit lowered my start up amperage by 10 amps.
My three ton AC unit was having trouble starting up only during the hottest part of the day, tripping the breaker whenever it tried to turn on. I had a technician come out who tried to sell me on getting an entirely new unit, which would have cost thousands of dollars. He also mentioned using a hard start kit (his was a cheaper, two wire one), which he wanted to sell me for around $250.
At my first maintenance visit, all of a sudden now my compressor is pulling 84 amps at startup and is rated for 88 RLA. They recommended a hard start kit for $200. I was also told that if this wasn't done, the compressor would soon fail and a complete condensing unit would have to be replaced as mine uses R-22. I asked exactly what that was and all he could tell me that it was a two wire capacitor kit.
The power in my residential area seems to fluctuate greatly. At times, my compressor would work just fine and at other times not at all. I installed the hard start kit in about 10 minutes. I had to install it at an angle so that this compressor and the run capacitor would both fit inside the cabinet. The directions were easy to follow. While I installed this kit, I also double checked all of the wiring to make sure it tightened correctly.
A couple years ago my central AC unit started blowing hot air, so I called the original AC installer to come take a look at it since it was still under warranty. The technician installed a hard start kit (two wire version) to the compressor on the outside unit, it seemed to fix the problem...sometimes. The next summer I noticed that the same problem started happening again.
Last year I had the HVAC guy come out and work on my AC compressor. He used a two wire hard start kit to get my compressor going and said that I had a "tight compressor". The compressor worked for the hottest months of the year then quit again. When it quit it took the contactor and the transformer with it. I decided to take a chance on this hard start kit. I replaced the contactor, the 115 volt to 24 volt transformer and I added this 521 kit.
The capacitor went out on my 3 ton unit and it would only hum before going into protection mode. I decided, since the only starting boost was a dual start capacitor, to add the hard start kit as well. The unit now starts about 30 amps less on locked current amp rating. Much smoother and should save a bit on electic bills. I will also say that this HVAC Mega Store shipped it out the same day Fed X on regular shipping. It arrived very quickly.
Since a 2 wire type operates on temperature and not on the run speed of the compressor it could stay in the circuit longer than needed or not long enough. This 5-2-1 kit removes the capacitor from the circuit when the compressor reaches a certain speed which is done by the relay sensing voltage.I emailed the company to ask a question about the type of relay that they used & received an answer back the same day from one of their technical engineers.
Answer: yes