What Is a Hard Start Condition in an AC Compressor?

If your air conditioner struggles to turn on or takes longer than usual to start cooling, your compressor may have developed a hard start condition. This can lead to higher energy bills, increased wear and tear, and even compressor failure if left unchecked.

What Causes a Hard Start Condition?

A compressor is the heart of your AC system, responsible for circulating refrigerant and keeping your home cool. When it has trouble starting, it could be due to:

✔️ Weak or failing start capacitor – The capacitor provides the initial jolt of power the compressor needs. If it’s weak, the compressor may hesitate or struggle to start.

✔️ Low voltage supply – If your system isn’t getting enough power, the compressor may struggle to turn on.

✔️ Internal compressor wear – Over time, wear and tear can make it harder for the compressor to start, leading to increased strain.

✔️ Refrigerant issues – If the system is overcharged or undercharged, it can cause the compressor to work harder.

✔️ High Locked Rotor Amps (LRA) – If the compressor is drawing excessive power at startup, it’s a sign that it’s having difficulty starting.

How We Diagnose and Fix Hard Start Issues

At Orbit Air and Heat, we don’t just install a hard start kit and call it a day. We thoroughly inspect your system to make sure we address the root cause of the issue. Our process includes:

✅ Checking the capacitor and start components – If these are weak, we’ll replace them.

✅ Testing voltage supply – Ensuring your system is getting the right power to start efficiently.

✅ Inspecting refrigerant levels – Making sure your AC isn’t overcharged or low on refrigerant.

✅ Measuring amp draw – Checking if the compressor is pulling too much power.

✅ Looking for internal compressor wear – If the compressor is beyond repair, we’ll discuss your best options.

How a Hard Start Kit Can Help

If your system is in otherwise good condition, a hard start kit can give your compressor an extra boost at startup. It consists of:

✅ Start Capacitor – Provides an extra surge of power to help the compressor start more efficiently.

✅ Potential Relay – Disengages the capacitor once the compressor is running, preventing overload.

Benefits of Installing a Hard Start Kit:

✔️ Reduces startup strain – Helps the compressor start smoothly, reducing wear and tear.

✔️ Lowers energy consumption – A struggling compressor pulls more power, increasing energy costs. A hard start kit helps reduce that strain.

✔️ Extends compressor life – Less stress on the compressor means a longer lifespan and fewer breakdowns.

✔️ Faster cooling – A properly starting compressor cools your home more efficiently.

When to Consider a Hard Start Kit

If you notice any of these signs, a hard start kit may be a good solution:

🚨 AC unit takes longer than usual to start

🚨 Lights dim when the AC turns on (sign of high power draw)

🚨 Frequent tripped breakers when AC starts

🚨 Loud clicking or buzzing noises at startup

Should You Repair or Replace Your Compressor?

A hard start kit can extend the life of your compressor, but it won’t fix a failing compressor. That’s why we always check for underlying issues first—if your system is old, inefficient, or showing signs of major internal wear, we’ll help you determine whether a repair or replacement is the best option.

Need Help? Call Orbit Air and Heat! 🚀

If your AC is struggling to start, don’t wait for it to fail! We will diagnose the issue, address the root cause, and install a hard start kit if needed—so you can keep your home comfortable and avoid costly breakdowns.

📞 Call us today at (346)795-5703 to book a service!

Before installing the hard start kit, the compressor was pulling 88 amps, exceeding its Locked Rotor Amps of 77. After installation, the startup amp draw dropped to 38.7, reducing strain on the system and improving efficiency.