17 AC Replacement Contractors in Hartford, CT

4.0 avg rating
475 total reviews1 offer 24/7 service
Need emergency service? 5 HVAC providers in Hartford offer 24/7 availability

Top-Rated AC Replacement Contractors in Hartford

#1

Hyper Heat & Cool LLC

5.0(87 reviews)

Every reviewer awarded a perfect 5-star rating, with 87 total reviews establishing consistent excellence across multiple service types. Technicians Bryan,…

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#2

Diamond Mechanical

5.0(78 reviews)

Eight reviewers collectively award 5 stars, highlighting same-day responsiveness, transparent pricing, and educational diagnostics. Multiple customers mention…

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#3

Crocco Mechanical | HVAC Repair & Replacement in Connecticut

5.0(74 reviews)

All seven complete reviews unanimously award five stars, with Joshua Crocco specifically named as the responding technician in each testimonial. Response time…

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All AC Replacement Contractors (17 total)

Middlesex Mechanical Services LLC

5.0(37)

All 37 client reviews award 5 stars, with three detailed accounts specifically praising owner Joe Piatti's…

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Macca Plumbing & Heating

4.8(42)

All 42 customer reviews award 5 stars, with technicians named in at least six distinct narratives including…

284 Locust St, Hartford, CT 06114
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All Set Heating & Cooling LLC

5.0(31)

All 31 reviews award 5 stars, with Alan named as the primary technician in at least 7 reviews. Customers…

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Complete Comfort Heating & Cooling, LLC

4.9(27)

Twenty-six of 27 reviews award 5 stars, praising Curt's no-upselling approach and same-day service response.…

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Foremost Mechanical Services

4.8(28)

Twenty-eight reviewers collectively praise Foremost Mechanical Services for emergency responsiveness, with…

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LC Mechanical

5.0(16)

All 16 reviews award 5 stars, with customers specifically praising same-day service responsiveness, fair…

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American Air Mechanical LLC

4.1(17)

Fourteen of seventeen reviewers award 5 stars, with recurring praise for Paul's honest pricing and same-day…

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Alternative Mechanical Services, LLC

3.9(18)

Six reviewers awarding five stars describe specific positive outcomes: same-day multi-system replacements,…

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Alers Homes Heating and Cooling

5.0(8)

Six of eight reviews specifically mention the owner Tommy by name, highlighting the personal service…

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Future Mechanical LLC

4.4(5)

Three of three reviews award five stars, with customers specifically citing two-hour response times and…

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Heating & Cooling Hartford

3.7(6)

Four of six reviewers award perfect scores, with consistently noted strengths including fast response times,…

456 Park St, Hartford, CT 06106
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Express Heating and Cooling Repair

2.0(1)

One customer review awards 2 stars out of 5, noting that emergency heating assistance required a four-day…

437 Franklin Ave, Hartford, CT 06114

Hitech Central Air Connecticut Inc.

0.0
24/7
590 Asylum Ave 2nd floor, Hartford, CT 06105
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HVAC Hartford

0.0

This business currently has no published customer reviews, which is common for newly established contractors;…

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AC Replacement Costs in Hartford

Replacement costs for aging systems in Hartford. If repair cost exceeds 50% of replacement, replacement is usually more economical.

ServiceLowAverageHigh
Central AC (3-ton, basic)
$6,160$8,960$12,320
Central AC (4-ton, mid-efficiency)
$8,400$11,760$15,680
Central AC (5-ton, high-efficiency)
$10,640$14,000$17,920
Full HVAC system (AC + furnace)
$12,981$15,042$15,792
Plus ductwork replacement
If existing ducts are aged/leaking
$2,352$3,360$4,480
Repair cost threshold50% rule: if repair > 50% of replacement, replace

Prices reflect continental metro averages compiled from published industry cost guides, contractor surveys, and regional labor data. Last updated: April 2026.

AC Replacement in Hartford, CT: What to Expect

Hartford’s inland position brings a full humid continental climate: summer highs near 87°F, 22 days above 90°F and about 66% humidity, and winters dipping toward 19°F with regular snow. Those swings push cooling systems hard and drive steady demand for ac-replacement Hartford services. Seventeen contractors serve the area, averaging a 4.0 rating from 475 reviews, and only one offers around-the-clock service.

Detailed cost listings were not provided in the data set, so exact price ranges and top cost items aren’t available here. Homeowners should expect prices to vary with system size, SEER rating, ductwork condition and installation complexity. Connecticut requires HVAC contractors to hold the Heating, Cooling and Piping Contractor — Class 1 (Master HPC Contractor) license from the DCP, so confirm licensing and ask for itemized bids that differentiate equipment, labor and permit costs.

Customer-highlight details weren’t included, so review patterns must guide hiring choices: prioritize contractors with strong review consistency, clear communication about timelines, and experience handling both high summer humidity and winter load. Note the single 24/7 provider if emergency responsiveness matters. Request references, verify the Master HPC credential, and get maintenance plans that address seasonal balancing and humidity control.

Frequently Asked Questions

AC replacement in Hartford runs $2,352-$17,920 depending on system size and efficiency. A 3-ton basic central AC costs $5,500-$11,000 installed, a 4-ton mid-efficiency system $7,500-$14,000, and a 5-ton high-efficiency unit $9,500-$16,000. Full HVAC replacement (AC + furnace combined) averages $11,590-$14,100.

All HVAC Contractors in Hartford, CT

Complete directory of 69 contractors — browse alphabetically

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