How to Fix Low Voltage: Causes, Solutions, and Expert Tips for a Safer Electrical System

Experiencing flickering lights, weak appliances, or unstable power in your home or business? These are common signs of low voltage, a problem that can affect performance, safety, and even damage sensitive electronics. In this guide, we’ll explain what causes low voltage, how to diagnose it, and what steps you can take to fix it safely and effectively. Our experienced low voltage technicians in Los Angeles can quickly identify and resolve wiring or connection issues that cause power drops.

What Is Low Voltage?

Low voltage occurs when the electrical supply to your home or building drops below the normal range (typically 110–120 volts in the U.S.). Even a small drop can cause lights to dim, motors to slow down, or equipment to malfunction.

There are two main types of voltage problems:

• Temporary voltage drops – Short-term dips caused by high demand or faulty connections.
• Chronic low voltage – Long-term or consistent low power levels that often indicate deeper wiring or utility issues.

Common Causes of Low Voltage

Before you can fix low voltage, it’s important to understand what’s causing it. Some of the most common reasons include:

1. Overloaded circuits – Too many appliances or devices running at once can cause voltage drops.
2. Loose or corroded wiring – Poor connections increase resistance and reduce current flow.
3. Faulty transformers or service lines – Problems with the utility supply can lower voltage across your property.
4. Undersized wiring – Wires that are too small for the electrical load cause voltage loss over distance.
5. Damaged electrical components – Burned contacts, worn outlets, or malfunctioning breakers can also cause low voltage.

Understanding which of these applies to your situation will guide your repair strategy.

How to Diagnose Low Voltage Problems

If you suspect low voltage, here are a few ways to confirm it:

1. Use a multimeter – Measure the voltage at an outlet. A reading below 110V may indicate a problem.
2. Check specific circuits – Determine if the issue affects one circuit, one area, or the entire property.
3. Inspect connections and outlets – Look for signs of wear, corrosion, or overheating.
4. Compare different times of day – Voltage may drop during peak electricity demand.
5. Call your utility provider – Sometimes, the issue is external and related to their service lines.

If the voltage consistently reads low, it’s time to take corrective action.

How to Fix Low Voltage

Depending on the cause, fixing low voltage can range from simple DIY solutions to professional repairs.

1. Reduce Load on the Circuit

Unplug or redistribute devices to prevent overloading a single line. Large appliances like air conditioners or heaters should be on dedicated circuits.

2. Tighten or Replace Loose Connections

Loose or corroded terminals can significantly drop voltage. Turn off power at the breaker before tightening or replacing wiring connections.

3. Upgrade Wiring Size

If your wiring is undersized for the distance or load, upgrade to a thicker gauge wire. This reduces resistance and improves voltage stability.

4. Repair or Replace Faulty Components

Replace worn-out outlets, switches, or breakers that may be restricting current flow. Faulty components often show burn marks or feel warm to the touch.

5. Install a Voltage Stabilizer or Regulator

For properties that frequently experience dips from utility issues, voltage stabilizers can help balance incoming power and protect sensitive equipment.

6. Contact a Licensed Electrician

If you’ve ruled out basic causes or the issue affects your main service line, hire a licensed low-voltage or electrical contractor. They can safely inspect panels, transformers, and distribution systems to locate the problem.

Safety Tips When Dealing with Low Voltage

• Always turn off power at the breaker before inspecting wiring.
• Avoid working with main service lines unless you’re a qualified electrician.
• Don’t ignore chronic low voltage—it can cause long-term damage to motors and electronics.
• Use surge protectors for sensitive equipment like computers and TVs.

When to Call a Professional

If your entire home or business experiences low voltage or you notice recurring issues like flickering lights or tripping breakers, it’s best to call a professional. Low voltage repairs often require specialized tools and knowledge of electrical codes to ensure safety and compliance.

Licensed electricians can:

• Measure and balance voltage across circuits
• Test transformer and grounding systems
• Identify faulty neutral lines or overloaded panels
• Provide long-term solutions for stable power delivery

Preventing Future Low Voltage Problems

Once your system is fixed, a few proactive steps can help prevent future voltage drops:

• Schedule regular electrical inspections
• Replace old wiring during renovations
• Balance loads across multiple circuits
• Keep connections clean and secure
• Invest in surge and voltage protection devices

A properly maintained electrical system will keep your devices running smoothly and extend their lifespan. Before making repairs, it’s important to identify the root cause. Learn how to test for low voltage using simple tools and techniques.

Final Thoughts

Low voltage isn’t just an inconvenience—it’s a sign that your electrical system needs attention. Whether it’s a simple overloaded circuit or a larger supply issue, taking quick action can prevent costly damage and safety hazards.

If you’re in California or nearby areas, consider contacting a licensed low-voltage contractor for a full inspection and repair service. Professional help ensures your power supply stays consistent, safe, and ready to handle modern electrical demands.