What To Know
- An air handler breaker is an essential component of an air conditioning system that protects the air handler unit from electrical overloads and short circuits.
- In the event of a short circuit, where a low-resistance path allows excessive current to flow, the breaker trips to isolate the fault and prevent damage to the electrical system.
- An air handler breaker tripping means that the electrical circuit to the air handler has been interrupted due to an overload or short circuit.
An air handler breaker is an essential component of an air conditioning system that protects the air handler unit from electrical overloads and short circuits. It is a type of circuit breaker specifically designed to handle the high current draw of an air handler motor.
Functions of an Air Handler Breaker
The primary functions of an air handler breaker include:
- Overload Protection: When the current flowing through the air handler motor exceeds a safe level, the breaker trips to interrupt the electrical circuit, preventing damage to the motor.
- Short Circuit Protection: In the event of a short circuit, where a low-resistance path allows excessive current to flow, the breaker trips to isolate the fault and prevent damage to the electrical system.
- Resettability: Unlike fuses, air handler breakers can be reset after tripping, making them a convenient and reusable protective device.
Types of Air Handler Breakers
There are several types of air handler breakers available, including:
- Thermal Magnetic Breakers: These breakers use a bimetallic strip and an electromagnet to sense overloads and short circuits, respectively.
- Electronic Breakers: These breakers use electronic circuitry to monitor current flow and trip when necessary.
- Magnetic-Only Breakers: These breakers use only an electromagnet to detect short circuits, but not overloads.
Location of Air Handler Breakers
Air handler breakers are typically located in the electrical panel that supplies power to the HVAC system. They may be mounted directly on the panel or housed in a separate enclosure.
Troubleshooting Air Handler Breaker Trips
If an air handler breaker trips repeatedly, it is important to identify the underlying cause. Common reasons for breaker trips include:
- Oversized Air Handler: An air handler that is too large for the space it is cooling will draw excessive current, causing the breaker to trip.
- Dirty Condenser Coils: Dirty condenser coils can reduce the efficiency of the air conditioner, leading to higher current draw and breaker trips.
- Electrical Faults: Loose connections, damaged wires, or faulty components can cause short circuits and breaker trips.
- Overheating Motor: A worn or damaged air handler motor can overheat and draw excessive current, causing the breaker to trip.
Resetting an Air Handler Breaker
To reset an air handler breaker, follow these steps:
1. Turn off the power to the HVAC system at the electrical panel.
2. Locate the air handler breaker and ensure that it is in the “tripped” position (typically, this means the handle is in the middle position).
3. Push the handle firmly to the “off” position.
4. Wait a few seconds and then push the handle to the “on” position.
5. Turn on the power to the HVAC system and check if the air handler is operating properly.
When to Replace an Air Handler Breaker
If an air handler breaker trips repeatedly after resetting, it may be necessary to replace it. Other signs that an air handler breaker needs to be replaced include:
- Burned or discolored contacts
- Loose or damaged terminals
- Scorching or melting of the breaker housing
Popular Questions
1. What happens if an air handler breaker trips?
An air handler breaker tripping means that the electrical circuit to the air handler has been interrupted due to an overload or short circuit.
2. How can I prevent air handler breaker trips?
To prevent air handler breaker trips, ensure that the air handler is properly sized for the space it is cooling, keep the condenser coils clean, and have the electrical system inspected regularly.
3. Can I reset an air handler breaker myself?
Yes, you can reset an air handler breaker yourself by following the steps outlined in the “Resetting an Air Handler Breaker” section. However, if the breaker trips repeatedly, it is recommended to contact a qualified electrician.
4. How much does it cost to replace an air handler breaker?
The cost to replace an air handler breaker varies depending on the type of breaker and the labor costs in your area. Typically, it ranges from $50 to $200.
5. Can I use a regular circuit breaker to replace an air handler breaker?
No, you should not use a regular circuit breaker to replace an air handler breaker. Air handler breakers are specifically designed to handle the high current draw of an air handler motor.
