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HVAC Services in Lowell, IN & Surrounding NWI Areas

From the first freeze to the dog days of summer, South County Mechanical keeps Northwest Indiana homes comfortable. Our trained technicians repair, install, and maintain every part of your HVAC system: furnaces, air conditioners, heat pumps, and ductless mini-splits, plus indoor air quality solutions that keep your home healthy. Whatever the season or the problem, we get the job done right the first time.
High-efficiency furnace installed in a Northwest Indiana basement

Heating & Furnace Services

When your furnace quits on a cold NWI night, you need a team that answers. We provide fast furnace repair, energy-efficient installation, and seasonal maintenance to keep your home warm and safe all winter.

Furnace Repair

  • Most furnaces give off warning signs before they fail. Call us when you notice:
  • Weak or no heat, or cool air from the vents
  • Short cycling, where the furnace turns on and off repeatedly
  • Banging, rattling, or squealing noises
  • A sudden spike in heating bills
  • A yellow or flickering burner flame (should be steady and blue)
  • As a gas piping specialist, we pay special attention to your furnace’s gas connections and heat exchanger — the parts that protect your family from carbon monoxide.

Furnace Installation & Replacement

If your furnace is 15+ years old, needs frequent repairs, or can’t heat evenly, a new high-efficiency system can lower your bills and improve comfort. We handle proper sizing, safe gas and venting connections, and a clean, code-compliant install, and we’ll walk you through efficiency ratings and financing.

Furnace Maintenance & Tune-Ups

The best repair is the one you never need. A fall tune-up keeps your system safe and efficient and helps prevent surprise breakdowns. We inspect the heat exchanger, clean burners and the ignition system, test safety controls, check gas connections, and more. Ask about our maintenance plans for priority service and member savings.

Air Conditioning Services

Beat the heat with dependable AC service. From quick repairs to full installs and seasonal tune-ups, we keep your home cool and comfortable all summer.

AC Repair

  • Your AC usually drops hints before it quits. Call us when you notice:
  • Warm or weak air from the vents
  • Short cycling or constant running
  • Rising energy bills
  • Musty or burning odors
  • Loud or unusual noises, or uneven cooling
  • Our technicians pinpoint the problem and restore your comfort fast, with reliable, cost-effective service for area homeowners.
New air conditioning condenser installed by South County Mechanical

AC Installation & Replacement

If your air conditioner is 10–15+ years old or needs constant repairs, a new high-efficiency system is often the smarter investment. We handle correct sizing, a clean install, and a full system check so your new AC performs at its best from day one. Ask about financing to upgrade without a large upfront cost.

AC Maintenance & Tune-Ups

A spring tune-up keeps your AC cooling at top capacity and helps it last longer. We check refrigerant, clean coils, test electrical components, clear the condensate drain, and verify performance before the first heat wave.

Heat Pump Services

A heat pump delivers efficient heating and cooling from a single system, a smart, energy-saving choice for many NWI homes. We repair, install, and maintain heat pumps for reliable, year-round comfort.

Heat Pump Repair

Because a heat pump runs all year, a breakdown can leave you uncomfortable in any season. Call us for icing on the outdoor unit, weak heating or cooling, constant running, strange noises, or short cycling. We diagnose and fix the full range of heat pump issues fast.

Heat Pump Installation

Modern heat pumps are more efficient than ever and can pair with a furnace in a dual-fuel setup for reliable comfort even in the coldest Indiana weather. We’ll help you decide if a heat pump is right for your home and handle a clean, correctly sized install.

Heat Pump Maintenance

Because it works year-round, a heat pump benefits from a tune-up twice a year. We check refrigerant, clean coils, test the reversing valve and defrost cycle, and verify performance to keep energy costs in check.

HVAC technician servicing an indoor unit in a Northwest Indiana home

Indoor Air Quality Solutions

The air inside your home can be more polluted than the air outside — and you breathe it all day. We help your family breathe easier with cleaner air, balanced humidity, and fresh ventilation.

Air filtration & purification

capture dust, pollen, dander, and airborne particles.

Humidifiers

add moisture to combat dry, itchy winter air.

Dehumidifiers

control humidity to reduce mold and that muggy summer feel.

Ventilation systems

bring in fresh air while staying energy efficient.

UV germicidal lights

help reduce mold and bacteria on your system’s coil.

Ductless Mini-Split Installation

Need to heat or cool a space without ductwork? A ductless mini-split is perfect for additions, garages, sunrooms, finished basements, and rooms that never feel quite right. Mini-splits deliver both heating and cooling, install quickly, and let you control the temperature in each zone independently. We size and place your system for the best performance and a clean, professional look.

HVAC Frequently Asked Questions

We recommend a heating tune-up each fall and a cooling tune-up each spring. Heat pumps, which run year-round, benefit from service twice a year.
Yes. We offer emergency and same-day service throughout NWI. Call (219) 552-0228.
Ductless mini-split installed by South County Mechanical