Frequently asked questions

What is a SureStart used for?

This product has been developed specifically to soft start large single phase compressors and motors. It provides a dramatic reduction in the starting current but still provides full start torque. It will automatically adjust itself to cover the range of 1.75 to 7 hp. It is fully self-contained in a conveniently small, double insulated and flame retardant enclosure. Contact us if you're interested in purchasing our products or need more information.  

Is there a difference between a hard start kit and a soft starter?

Download and review this attachment for an explanation of the differences between a hard start kit and a soft starter.

What is the starting current reduction I should see after installing a SureStart?

On the standard SureStart models SS1B08-16SN and SS1B16-32SN you will see a current reduction of 60-70%.

On the pressurized SureStart model SS1B08-20PN you will see a current reduction of 30-50%.

The wiring diagram on my HVAC unit does not match the wiring diagram in the instructions, what should I do?

There are a large variety of wiring setups in the market and the SureStart instructions only include general wiring instructions.  If the wiring is unclear, please email a photo of the wiring diagram to for assistance on how to wire in the SureStart specifically for your unit.

How do I determine what model SureStart I need?

When trying to determine the appropriate SureStart model to use, first verify the compressor type within the HVAC unit.


If the HVAC unit has a SCROLL compressor:

Verify the RLA and LRA of the compressor, which is listed on the label of every AC unit or heat pump.

If the RLA is between 8 to 15 amps you would use the SS1B08-16SN model.

If the RLA is between 16 to 32 amps you can use the SS1B16-32SN model.  

If the RLA is between 15 and 16 amps then you need to verify the LRA value. If the LRA is below 90 then you would use the SS1B08-16SN and if the LRA is above 90 you would use the SS1B16-32SN.


If the HVAC unit has a RECIPROCATING/PISTON or ROTARY compressor:

Verify the RLA of the compressor.  If the RLA is 20 amps or less you would need the SS1B08-20PN model. 

If the RLA of the compressor is above 20 amps unfortunately we don’t have a solution for this setup.

Can SureStart be installed on HVAC systems with variable speed or "inverter-driven compressors?"


Variable speed and similar compressors do not experience dramatically increased LRA that single/two stage compressors do.  Therefore, a soft starter should not be required and SureStart should not be installed.

What benefits does a SureStart provide?

- Reduces locked rotor amperage (LRA)/inrush current up to 70% at start-up

- Eliminates light flickering in the home

- Reduces A/C compressor start-up noise

- Avoids torque stress fracture on pipes

- Automatic optimization of compressor/motor start-up current

- Reduced stress and heating of compressor/motor therefore extending the life

- Allows systems to meet certain utility requirement

- Protects the compressor/motor from stalling at low voltages

- Delay function limits number of compressor/motor starts per hour

- Provides compressor/motor reversal protection during short power outages

- Internal delay timers prevents rapid cycling in fault conditions

- Provides brownout protection

- Self-testing diagnostics

How do I go about installing a SureStart on my HVAC unit?

Contact your authorized HVAC technician for assistance on installing a SureStart in your HVAC unit.  General installation instructions are included with every unit.  The installation takes about 15-20 minutes.  All wiring needed for the installation is included with the unit.  If further technical support is needed on the installation please contact

*All electrical power should be DISCONNECTED before beginning installation procedures.

How do I verify my SureStart is performing correctly?

After installation there should be no blinking LED lights.  If the SureStart LED is blinking there is an error in the installation.  If that is the case, please turn off the system and request technical support for wiring verification.  If there is no blinking LED light then you can use a FLUKE clamp meter in the 300's or higher usually a 375 or 376 are recommended to measure the inrush current.  While there will be some reduction during the first startup it usually takes 6-7 starts for the SureStart to fully optimize the starting current.  

Can I use a SureStart on a well pump?

There are limited instances that a SureStart can be wired in to work with a well pump, but majority of times the required terminal access to the motor is not available and therefore the SureStart will not work.

What is the warranty on the SureStart?

The warranty is limited to 1 year from the data of purchase.