87% of American households use some form of air conditioning. They contribute to about 40% of a building’s energy consumption.
When something goes wrong with them, it’s a major financial issue. Refrigerant leaks can also cause health problems such as respiratory issues. They’re a common problem with outside units but can also affect indoor ones.
Read on to learn tips on detecting refrigerant leaks in your HVAC system and what to do about them.
1. Know the Signs of a Refrigerant Leak
Visual refrigerant issue signs that point to a leak include:
- Oil spots on tubes, joints, or nearby components
- Ice buildup
- Corrosion on coils or lines
- Frozen evaporator coils
Keep your ears out for any odd sounds. Listen for hissing, jingling, or bubbling noises near the refrigerant lines or connections.
Your nose may notice leaks. They give off a sweet smell that resembles nail polish remover.
Other signs relate to poor HVAC efficiency. These include:
- Long cooling cycles
- Humid indoor air
- Warm air from the vents
- High energy bills
2. Use the Bubble Test
The bubble test is one of the easiest and most common leak detection techniques.
Take a solution of water and dish soap and apply it where you think there’s a leak. If it begins to bubble, that suggests escaping refrigerant. This test is best for larger and more obvious leaks.
You can also use an electronic leak detector for smaller leaks. Move the detector slowly along the refrigerant line and components. Wait for the alarm to trigger to find where the leak is.
3. Try More Advanced Methods for Detecting Refrigerant Leaks
Certain hard-to-find leaks require more advanced techniques such as a pressure resistance test.
Pump compressed nitrogen into your air conditioning system. Watch the pressure gauges for changes. Listen for a hissing sound as the gas escapes to spot holes.
Introduce ultraviolet dye into the system. Going through it with a black light helps track the traces of leaks.
4. Use Troubleshooting Techniques
A few heating and cooling system troubleshooting methods can stop leaks before they get worse.
Reattach any broken connections. Patch small holes in the evaporator coil. Replace the entire coil if it has significant damage.
Repair or replace the rubber seal on the Shrader valve if it leaks. Replace the lines that carry the coolant to the coil if they get damaged. Replace any corroded tubing.
5. Get Annual Tune-Ups
An annual tune-up is an essential part of proactive HVAC maintenance. It stops issues like leaks before they become worse.
Don’t just look for anyone for the job. Look for professionals who are certified to work with refrigerants. They have the experience and tools necessary for safely detecting refrigerant leaks that may be too small for you to recognize.
Know Where to Get Service
Detecting refrigerant leaks means looking for signs such as reduced performance and odd noises or smells. Use the right tools and troubleshooting methods. Professional service makes sure you don’t miss even the smallest leaks.
MetFab Heating and Cooling has been one of Clark County, WA’s most trusted HVAC companies for over 50 years.
Our number one goal is always your comfort. Years of experience and customer service let us provide a difference you can feel. Contact us for HVAC service today.