ATMA SUPPLY CSR-U1 Hard Start Device Compressor Saver for 1- to 3-Ton AC Units

4.3 4.3 out of 5 stars | 87 ratings

Price: 18.99

Last update: 09-06-2024


About this item

This hard start kit works on 1-2-3 tons AC units, Package includes 1 x CSR-U1 Hard Start Capacitor Kit, 1 x Cable Ties, 2 x Screws
The compression savor uses a powerful multi-layer starting capacitor and a smart switch to give your compressor the boost it needs to start up quickly, more reliably, draw less power and save you money
The compressor saver significantly reduces the amount of time your compressor is on high amp start-up. Using a powerful multi-layer starting capacitor and a smart switch to give your compressor the boost it needs to start up quickly, more reliably, draw less power and save your money
Easy to install-There are only 3 color coded wires which need to be connected, the black wire will be connected to the common side if the compressor, the stripped wire will be connected to the start winding of the compressor, and the red wire will be connected to the run winding of the compressor. Or you can look up for a YouTube video how to change the parts, it's not hard at all
For any reason you are not completely satisfied, you can request a replacement or a full refund

Product information

Technical Details


Top reviews from the United States

Batwing Chopstick
5.0 out of 5 stars Installed quickly and solved my startup issues on a 15 year-old 3Ton Goodman/Amana unit
Reviewed in the United States on December 5, 2022
Easy to install and does the job.
For the past couple years my outside condenser unit has been having a hard time starting when the weather gets hot, around 100-110F. When activated, the compressor buzzes/hums and just wont start. It will try many times until it finally will start but may take 5 or minutes buzzing on/off. When it is buzzing, I can see the lights dim a little in some rooms of the house so I know the circuits are being strained. This has been getting progressively worse over the past year so I decided to buy this hard-start-kit and finally address the issue.

Following the instructions and installing was simple enough. Make sure to pull the shunt to avoid a dangerous situation before you start! I did need to add a couple sheetmetal screws (Tapcon) to hold the capacitor and relay inside the wiring cavity. Plan out where everything will go before you start. No need to cut or splice cables if the existing "fast-on" spade connectors are in good shape. I was very pleased with the results. Now that the kit is installed, the compressor starts-up immediately, even on the hottest summer day!

My thanks to the manufacturer and Amazon for providing this inexpensive and easy solution.
Customer image
Batwing Chopstick
5.0 out of 5 stars Installed quickly and solved my startup issues on a 15 year-old 3Ton Goodman/Amana unit
Reviewed in the United States on December 5, 2022
Easy to install and does the job.
For the past couple years my outside condenser unit has been having a hard time starting when the weather gets hot, around 100-110F. When activated, the compressor buzzes/hums and just wont start. It will try many times until it finally will start but may take 5 or minutes buzzing on/off. When it is buzzing, I can see the lights dim a little in some rooms of the house so I know the circuits are being strained. This has been getting progressively worse over the past year so I decided to buy this hard-start-kit and finally address the issue.

Following the instructions and installing was simple enough. Make sure to pull the shunt to avoid a dangerous situation before you start! I did need to add a couple sheetmetal screws (Tapcon) to hold the capacitor and relay inside the wiring cavity. Plan out where everything will go before you start. No need to cut or splice cables if the existing "fast-on" spade connectors are in good shape. I was very pleased with the results. Now that the kit is installed, the compressor starts-up immediately, even on the hottest summer day!

My thanks to the manufacturer and Amazon for providing this inexpensive and easy solution.
Images in this review
Customer image Customer image Customer image
Kristina Coley
5.0 out of 5 stars Easy install
Reviewed in the United States on December 20, 2023
Works good
Raycarr
5.0 out of 5 stars starts the compressor rather quickly than without it.
Reviewed in the United States on September 1, 2023
starts the compressor rather quickly than without it. does it really save energy? maybe if it usually takes the compressor several tries to get going. easy to install- cut the power!
R. Widebrook
5.0 out of 5 stars Tames HVAC startup surge on solar power inverter. Install guides are on Youtube, item works well.
Reviewed in the United States on December 6, 2023
I installed this CSR-U1 "hard start" compressor relay-capacitor to complement a new install of an EG4 off-grid solar power inverter. Before the CSR-U1 was installed, my new-ish 2-ton HVAC heat pump compressor would draw a startup surge of ~59A from the 240VAC split phase grid supply. That flirts with the maximum of my EG4 inverter's rated surge tolerance. After the CSR-U1 install, the startup surge dropped to 32A, or 27A less. Nice! Good to know that it'll also extend the compressor's working life. A bonus is that the HVAC runs more quietly. $18 well spent. Will update on longer-term performance.
Customer image
R. Widebrook
5.0 out of 5 stars Tames HVAC startup surge on solar power inverter. Install guides are on Youtube, item works well.
Reviewed in the United States on December 6, 2023
I installed this CSR-U1 "hard start" compressor relay-capacitor to complement a new install of an EG4 off-grid solar power inverter. Before the CSR-U1 was installed, my new-ish 2-ton HVAC heat pump compressor would draw a startup surge of ~59A from the 240VAC split phase grid supply. That flirts with the maximum of my EG4 inverter's rated surge tolerance. After the CSR-U1 install, the startup surge dropped to 32A, or 27A less. Nice! Good to know that it'll also extend the compressor's working life. A bonus is that the HVAC runs more quietly. $18 well spent. Will update on longer-term performance.
Images in this review
Customer image
DC951s
1.0 out of 5 stars Capacitor instantly failed (other reviews indicate this also)
Reviewed in the United States on March 30, 2024
For those who are electricians or homeowners with reasonable electrical experience, this is a very straight-forward product to install.
3 pictures:
- general installation: easy to install with two screws. Nice and neat
- connection to capacitor: You can easily see the FAN and HERM, the C is lower right. Two connections: Red to Common-C, Stripped to HERM
- connection to T-side (not line side) common: black wire terminal, not red
You can clearly see all 3 connections I made.
When the system was turned on, the relay could be heard to operate, but the capacitor failed in a poof of smoke instantly.
I would welcome feedback from the manufacturer, but otherwise I highly recommend against this product. Very disappointing low quality.
Customer image
DC951s
1.0 out of 5 stars Capacitor instantly failed (other reviews indicate this also)
Reviewed in the United States on March 30, 2024
For those who are electricians or homeowners with reasonable electrical experience, this is a very straight-forward product to install.
3 pictures:
- general installation: easy to install with two screws. Nice and neat
- connection to capacitor: You can easily see the FAN and HERM, the C is lower right. Two connections: Red to Common-C, Stripped to HERM
- connection to T-side (not line side) common: black wire terminal, not red
You can clearly see all 3 connections I made.
When the system was turned on, the relay could be heard to operate, but the capacitor failed in a poof of smoke instantly.
I would welcome feedback from the manufacturer, but otherwise I highly recommend against this product. Very disappointing low quality.
Images in this review
Customer image Customer image Customer image
Michael
5.0 out of 5 stars Great product
Reviewed in the United States on February 28, 2023
Installed and working great
GlennSmith
5.0 out of 5 stars Easy install
Reviewed in the United States on July 11, 2022
Helps compressor start quick and easy
Reyna A.
1.0 out of 5 stars FAILED INSTANTLY
Reviewed in the United States on July 3, 2023
If you have experience with electrical diagrams the instructions are straight forward. The kit comes with everything you need. The problem is the capacitor failed instantly. I have a properly working HVAC unit. I wanted to install it due to high summer temps causing more frequent start ups.
Customer image
Reyna A.
1.0 out of 5 stars FAILED INSTANTLY
Reviewed in the United States on July 3, 2023
If you have experience with electrical diagrams the instructions are straight forward. The kit comes with everything you need. The problem is the capacitor failed instantly. I have a properly working HVAC unit. I wanted to install it due to high summer temps causing more frequent start ups.
Images in this review
Customer image Customer image

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