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Claim This BusinessFour Seasons Mechanical has kept Northwest Indiana comfortable since 2000, building a reputation across Lake County as the team homeowners call when heating or cooling systems fail. Based in Merrillville, the company maintains an A+ rating with the Better Business Bureau and holds a 4.8-star average across 88 Google reviews. Their service fleet handles calls in surrounding communities including Hobart, Schererville, and Crown Point, arriving at homes seven days a week with fully stocked trucks. The company operates as a licensed HVAC contractor with 24-hour emergency availability, meaning a technician can be at your door at midnight on a Sunday if the furnace quits during a winter snap.
What distinguishes this contractor from other area companies is their diagnostic approach and their work with ductless mini-split systems, which many older-area HVAC companies avoid. They install and service Mitsubishi ductless units, offering zoned heating and cooling for older homes without existing ductwork. Their website promotes a twice-yearly maintenance program that many reviewers mention joining, and they handle both residential homes and commercial properties including churches, offices, and retail spaces. The company also emphasizes Indoor Air Quality solutions, including filtering and purification upgrades that address the humidity challenges common to Northwest Indiana summers.
Reviewers consistently mention specific technicians who arrive at their homes. Josh has handled furnace diagnostics for multiple years, with one reviewer crediting him with discovering a corroded power switch that another company had told them required a full system replacement. Eric performs annual cleanings and inspections, with recent customers noting he caught a defective condensate drain line before it caused water damage. Helen handles scheduling at the front desk, with customers calling her helpful and pleasant. Cameron earned praise for prompt arrival and clear communication during a same-day service call.
All 8 reviewers awarded 5-star ratings, with 5 of them naming specific technicians (Josh, Eric, Cameron) by name. Service calls mentioned include furnace diagnostics, annual inspections, and AC cleaning, with reviewers specifically noting same-day appointment availability and transparent explanations of work performed.
| Sunday | Open 24 hours |
| Monday | Open 24 hours |
| Tuesday | Open 24 hours |
| Wednesday | Open 24 hours |
| ThursdayToday | Open 24 hours |
| Friday | Open 24 hours |
| Saturday | Open 24 hours |
New air conditioning system installations using Mitsubishi ductless technology for homes without existing ductwork.
Diagnostics, repair, and tune-ups for cooling systems including filter replacement and refrigerant checks.
New furnace installation including high-efficiency models for residential homes and light commercial buildings.
Heating system diagnostics, component repair, and emergency heating repair during cold weather months.
Mitsubishi-certified ductless installations providing zoned heating and cooling for older homes and room additions.
Twice-yearly preventive maintenance plans covering both spring cooling and fall heating system tune-ups.
Air filtration upgrades and purification systems addressing humidity and allergen concerns common to the region.
System design, installation, repairs, and maintenance for businesses including offices, churches, and retail spaces.