Express Air Conditioning And Heating Inc

Few things are more frustrating than a heating or cooling system that isn't performing as it should. Express Air Conditioning And Heating Inc. knows this all too well. That's why we've put together this guide to help you troubleshoot common HVAC issues before calling in the pros. This article focuses on one of the most frequent complaints we receive: insufficient cooling during the summer months. We'll walk you through a systematic approach to diagnose the problem and offer some simple, safe DIY fixes you can try.

Diagnosing Insufficient Cooling

Before assuming the worst, it's important to systematically investigate the potential causes of your AC's underperformance. Don't panic! Many issues are easily resolved with a few simple checks.

Step 1: Check the Thermostat

This might sound obvious, but it's often overlooked. Make sure your thermostat is set to COOL mode and that the desired temperature is significantly lower than the current room temperature. Also, ensure the thermostat is powered on and functioning correctly. A faulty thermostat can misread the temperature and prevent your AC from kicking on or running properly.

Things to check without tools:

• Thermostat mode (Cool, Heat, Auto, Off).
• Desired temperature setting.
• Battery level (if applicable). Replace batteries if low.
• Thermostat display functionality.

Step 2: Inspect the Air Filter

A dirty air filter is a major culprit behind poor AC performance. A clogged filter restricts airflow, forcing your system to work harder and reducing its cooling capacity. This can also lead to the evaporator coil freezing up (we'll get to that later).

Things to check without tools:

• Filter location. (Usually located in the indoor unit or a wall/ceiling vent.)
• Filter condition. Is it visibly dirty, dusty, or clogged?

DIY Action:

• Replace the air filter with a new one of the correct size. Most filters have the size printed on the frame. Using the wrong size can create gaps, allowing dust and debris to bypass the filter.

Step 3: Examine the Outdoor Unit (Condenser)

The outdoor unit plays a critical role in releasing heat from your home. If it's obstructed or malfunctioning, your AC won't cool effectively. Before approaching the unit, ensure the power to the AC system is turned off at the breaker box.

Things to check without tools:

• Clearance around the unit. Are there any plants, shrubs, or debris blocking airflow? Aim for at least 2-3 feet of clear space around the unit.
• Visually inspect the fins (the thin metal plates surrounding the unit). Are they bent, damaged, or covered in debris?

DIY Action:

• Carefully remove any debris blocking the unit.
• If the fins are bent, you can attempt to straighten them with a fin comb (available at most hardware stores). Be gentle and avoid applying excessive force.
• Lightly spray the fins with a garden hose to remove dirt and dust. Do not use a pressure washer!

Step 4: Check the Indoor Unit (Evaporator Coil)

The evaporator coil is responsible for absorbing heat from the air inside your home. If it's frozen or excessively dirty, it won't be able to do its job effectively. Accessing the evaporator coil often requires removing a panel on the indoor unit. Again, ensure the power is OFF before attempting this.

Things to check without tools (after removing the access panel):

• Visible ice buildup on the coil. This is a sign of a frozen evaporator coil.
• Excessive dust or dirt accumulation on the coil.

DIY Action (If the coil is frozen):

• Turn off the AC system and set the thermostat to FAN ONLY mode. This will circulate air over the coil and help it thaw.
• Check the air filter (as mentioned in Step 2) – a dirty filter is a common cause of frozen coils. Replace it if necessary.
• Allow several hours for the coil to thaw completely. Once thawed, turn the AC back on and monitor its performance.

Tools required for cleaning the evaporator coil (requires basic mechanical skills):

• Fin comb.
• Vacuum cleaner with brush attachment.
• Evaporator coil cleaner (specifically designed for AC coils).

DIY Action (If the coil is dirty, and you are comfortable with basic mechanical tasks):

• Carefully vacuum the coil with a brush attachment to remove loose dust and debris.
• Apply evaporator coil cleaner according to the manufacturer's instructions.
• Allow the cleaner to sit for the recommended time, then rinse the coil thoroughly with water (if the cleaner requires it).
• Replace the access panel and turn the power back on.

Step 5: Inspect the Ductwork

Leaky or damaged ductwork can significantly reduce the efficiency of your AC system by allowing cooled air to escape. This is especially common in older homes with poorly sealed ductwork.

Things to check without tools:

• Visually inspect accessible ductwork (e.g., in the attic or basement) for obvious signs of damage, such as tears, holes, or disconnected sections.
• Feel for air leaks around duct connections. You can use your hand or a piece of paper to detect drafts.

DIY Action:

• Seal small leaks or cracks in ductwork with duct tape (not regular tape). For larger leaks, consider using mastic sealant or foil tape.
• Ensure that ductwork is properly insulated, especially in unconditioned spaces like attics and crawl spaces.

When to Call a Professional from Express Air Conditioning And Heating Inc.

While many AC problems can be resolved with simple DIY solutions, some issues require the expertise of a qualified HVAC technician. Do not attempt to repair or diagnose the following issues yourself. These situations involve specialized knowledge, tools, and safety precautions.

• Refrigerant Leaks: Refrigerant is essential for the cooling process. If you suspect a refrigerant leak (e.g., due to low cooling performance and hissing sounds), do not attempt to handle it yourself. Refrigerant can be harmful, and proper handling requires specialized equipment and training.
• Compressor Problems: The compressor is the heart of your AC system. If it's making unusual noises or not running at all, it's likely a serious issue that requires professional attention. Replacing a compressor requires specialized tools, knowledge of refrigerants, and electrical expertise.
• Electrical Issues: Any electrical problems within your AC system, such as faulty wiring, blown fuses, or tripped breakers, should be handled by a qualified electrician or HVAC technician. Working with electricity can be dangerous and potentially fatal.
• Frozen Evaporator Coil (Recurring): If your evaporator coil freezes repeatedly, even after cleaning the filter and allowing it to thaw, there may be an underlying problem, such as a refrigerant leak, airflow restriction, or a faulty expansion valve.
• Age of the System: If your air conditioning unit is over 10-15 years old and consistently underperforming, it may be nearing the end of its lifespan. It might be more cost-effective to replace the unit with a newer, more efficient model.
• You're Uncomfortable or Unsure: If at any point during the troubleshooting process you feel uncomfortable or unsure about what you're doing, it's always best to call a professional. It's better to be safe than sorry.

Using Basic Equipment

• Multimeter: Only qualified individuals should use a multimeter to check voltages.
• Fin Comb: Used to straighten bent cooling fins.

Remember, your safety is paramount. If you're unsure about any aspect of AC repair, contact Express Air Conditioning And Heating Inc. We're here to help you stay cool and comfortable all summer long!

This guide provides a general overview of common AC problems. Always consult your AC system's owner's manual for specific instructions and safety precautions.