Compressor Saver CSR U1 Hard Start Capacitor

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. If you are thinking of buying a 2 wire kit think twice because most of them work on a thermistor and will only work once and not again until the thermistor cools down and on a hot day that could be awhile. 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. How refreshing it is to get a prompt response from a company these days.

You may spend a little more for this start kit but is well worth it as it should last longer than a 2 wire type and is safer for your compressor.

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 compressor came on and I have had nice cool AC this summer.

I did a lot of research before buying the 521 kit. 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.

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Dose what it claims to do and I did not need to hire someone to install it. It was easy, and I am not that technical , just follow the diagrams and you can't go wrong. I love this freakin thing!!!!!!

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Very easy to install. Cut down on compressor start-up noise. Start-up AMP's were 40-45% less. I will be installing these on all my families AC units.

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I installed this on a new 2.5 ton Goodman heat pump. Clear instructions, color coded, easy to install, works great!