Trane Hard Start Kit Wiring Diagram

If you are having trouble starting your Trane air conditioning unit, it may be time to install a hard start kit. A hard start kit is an electrical component that helps the compressor start up faster and more efficiently. In this article, we will provide a wiring diagram for a Trane hard start kit and answer some common questions about its installation.

What is a Hard Start Kit?

A hard start kit is an electrical component that provides an extra boost of power to the compressor when it starts up. This is especially useful for older air conditioning units or those that experience frequent power outages. A hard start kit can help prolong the life of your compressor by reducing wear and tear, as well as reducing the stress on your air conditioning system.

There are two types of hard start kits: potential relay and solid state. Potential relay kits are the most common and typically consist of a relay, start capacitor, and potential relay. Solid state kits use a solid state relay and do not require a start capacitor or potential relay.

How to Install a Trane Hard Start Kit

Before installing a Trane hard start kit, you will need to turn off the power supply to your air conditioning unit. You will also need to locate the compressor and remove the cover to access the wiring. Once you have done this, you can begin installing the kit.

Step 1: Connect the Common Wire

The first step is to connect the common wire from the hard start kit to the common terminal on the compressor. This is typically a brown wire and is located on the compressor’s terminal block.

Step 2: Connect the Start Capacitor Wire

Next, connect the start capacitor wire from the hard start kit to the start capacitor terminal on the compressor. This wire is typically white or red and connects to the terminal labeled “C” or “S” on the capacitor.

Step 3: Connect the Potential Relay

If your Trane hard start kit uses a potential relay, you will need to connect it next. The potential relay is typically located on the outside of the compressor and connects to the start capacitor wire and the common wire from the hard start kit.

Step 4: Connect the Power Wire

The last step is to connect the power wire from the hard start kit to the power supply in your air conditioning unit. This wire is typically black and connects to the L1 or L2 terminal on the contactor.

Trane Hard Start Kit Wiring Diagram

Wire Color Connection
Brown Common Terminal on Compressor
White or Red Start Capacitor Terminal on Compressor
Black Power Supply in Air Conditioning Unit (L1 or L2)

FAQ

What is the purpose of a hard start kit?

A hard start kit provides an extra boost of power to the compressor when it starts up, which can help prolong its lifespan and reduce wear and tear on your air conditioning system.

How do I know if I need a hard start kit?

If your air conditioning unit is having trouble starting up, it may be time to install a hard start kit. This is especially true if your unit is older or experiences frequent power outages.

Can I install a Trane hard start kit myself?

While it is possible to install a Trane hard start kit yourself, it is recommended that you hire a professional to ensure that it is installed correctly and safely.

How much does a Trane hard start kit cost?

The cost of a Trane hard start kit can vary depending on the model and where you purchase it from. On average, you can expect to pay between $50 and $150 for a Trane hard start kit.

Will a hard start kit fix all compressor issues?

No, a hard start kit will not fix all compressor issues. If your compressor is damaged or failing, a hard start kit may not be enough to fix the problem.