L & J Cooling and Heating

980-354-4118

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L & J Cooling and Heating

980-354-4118

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  • Home
  • About
    • About
    • Service Area's
    • Services We Offer
  • Heating
  • Air Conditioning
  • IAQ
  • Blog
  • Explore Our Brands
    • Trane
    • Mitsubishi Electric HVAC
    • WaterFurnace
  • FAQ'S
    • Trane FAQ's
    • WaterFurnace FAQ's
    • Mitsubishi HVAC FAQ's
    • FAQ's

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Frequently Asked Questions

Please reach us at info@ljcoolingandheating.com if you cannot find an answer to your question.

 You should schedule maintenance twice a year — once for your air conditioner/heat pump in the spring and once for your furnace or heating system in the fall. Regular tune-ups help prevent breakdowns, lower energy bills, and extend system life. 


If your system is 10–15+ years old, needs frequent repairs, uses outdated refrigerant, or struggles to cool/heat consistently, replacement is usually the most cost-effective choice. Newer systems offer far higher SEER and HSPF ratings for better efficiency.


Warm air usually means low refrigerant, dirty coils, airflow restrictions, or a failing compressor. A quick diagnostic can determine the exact cause. 


• Furnace: 15–25 years

• Air conditioner: 12–18 years

• Heat pump: 10–15 years

Lifespan depends on maintenance, installation quality, and usage.


An air conditioner only cools. A heat pump cools and heats, making it a year-round system. Heat pumps are highly energy-efficient and perfect for North Carolina’s climate 


The SEER rating measures cooling efficiency. Higher SEER = lower energy bills. Modern systems commonly range from 14 to 20+ SEER depending on model. 


Uneven temperatures are usually caused by duct leaks, poor airflow, incorrect system sizing, or insulation issues. We can diagnose airflow and duct problems during a service call. 


Every 1–3 months depending on filter type, pets, allergies, and overall system usage. Dirty filters can cause high energy bills and system failure.


Yes! We install Trane CleanEffects™, humidifiers, dehumidifiers, UV lights, ERVs, and high-efficiency filtration systems to improve indoor air quality and reduce allergens, dust, and bacteria. 


Banging, grinding, hissing, or rattling noises often indicate loose parts, failing motors, low refrigerant, or ductwork problems. It’s best to have it checked before damage worsens. 


Yes — we offer financing options for new HVAC installations. Many homeowners also qualify for rebates and energy-efficiency incentives. 


We service Iredell, Mecklenburg, Rowan, Cabarrus, and Catawba Counties, including Troutman, Mooresville, Statesville, Huntersville, Charlotte, Hickory, Salisbury, Concord, and surrounding towns 


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L & J Cooling and Heating LLC

PO Box #242. Troutman NC 28166

980-354-4118

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