Call for Free Advice 08003686833

Why Does a Space Heater Keep Tripping the Breaker?

If your space heater keeps tripping the circuit breaker, it can be a frustrating and potentially dangerous issue. Several factors can lead to this problem, and it's essential to understand why it's happening and how to prevent it.

1. Overloading the Circuit

One of the most common reasons for a space heater tripping the breaker is overloading the circuit. Space heaters, especially those with high wattage, can draw a significant amount of electricity. If the circuit is already handling other appliances or devices, the added load from the heater can exceed the circuit's capacity, causing it to trip. To prevent this, consider using the space heater on a dedicated circuit with no other high-power devices.

2. Faulty Wiring

Faulty wiring in your home can also contribute to circuit breakers tripping. If there are loose connections or damaged wires, the resistance in the circuit increases, causing the breaker to trip as a safety measure. It's crucial to inspect your electrical system for any signs of damage or loose connections and have them repaired by a qualified electrician.

3. Old or Inadequate Breaker

The circuit breaker itself may be the issue. Breakers can wear out over time, especially in older homes. If your breaker is old and no longer functions properly, it may trip more frequently. Upgrading to a newer, appropriately sized breaker can help prevent this problem. Ensure that the breaker's amperage rating matches the space heater's power requirements.

4. Extension Cords and Outlets

Using extension cords or outlets that are not rated for the space heater's wattage can lead to overheating and tripping the breaker. Make sure the extension cord and outlet are suitable for the heater's power needs. Using a heavy-duty extension cord with a sufficient amp rating is advisable to reduce the risk of tripping the breaker.

5. Heater Malfunction

Occasionally, the space heater itself may have a malfunction that causes it to draw more power than it should. If you suspect this, discontinue use of the heater and have it inspected or repaired by a professional technician. It's crucial to ensure the heater is in good working condition to prevent electrical issues.

6. Regular Maintenance

Preventive maintenance can help avoid issues with circuit breakers and space heaters. Keep the heater clean, and regularly check the power cord and plug for any damage. Additionally, ensure the heater's internal components are free from dust and debris, which can cause overheating and increased power consumption.


Understanding why a space heater keeps tripping the circuit breaker is essential for safety and convenience. Overloading the circuit, faulty wiring, old breakers, inadequate outlets, heater malfunctions, and lack of maintenance are common culprits. By addressing these factors, you can prevent circuit breaker trips and safely use your space heater.

Site mapHome