11 AC Replacement Contractors in Sunnyvale, CA

4.3 avg rating
443 total reviews3 offer 24/7 service
Need emergency service? 9 HVAC providers in Sunnyvale offer 24/7 availability

Top-Rated AC Replacement Contractors in Sunnyvale

#1

United Plumbing & Water Heaters

5.0(133 reviews)
Highly Rated

All 133 reviews award perfect 5-star ratings, with multiple customers specifically naming Alton for faucet replacements and emergency responses. Four reviewers…

1159 Sonora Ct, Sunnyvale, CA 94086
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#2

Lifetime Roofing & Renovation, Inc.

4.8(157 reviews)
Highly Rated

Every reviewer awarded 5 stars, with seven clients specifically naming team members (Matt M, Gui, Raymond, Brad, and Paulo) for their communication,…

333 Cobalt Way Unit 103 #103, Sunnyvale, CA 94085
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#3

Green Tree Household Services

4.9(51 reviews)
24/7

Every one of the 51 reviews assigns 5 stars, an unusually consistent pattern indicating strong customer satisfaction. Eight reviewed customers describe…

1363 Lillian Ave, Sunnyvale, CA 94087
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All AC Replacement Contractors (11 total)

All Appliance & HVAC Service Inc

4.6(29)

All six available reviews award five stars, with Frank specifically mentioned in three reviews for same-day…

1385 La Bella Ave, Sunnyvale, CA 94087
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Pureflow Air Duct and Chimney Cleaning Inc

5.0(20)
24/7

Every reviewer rated Pureflow a perfect 5 stars, with 6 of 8 reviewers specifically mentioning chimney…

1219 Townsend Terrace, Sunnyvale, CA 94087
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Grumpy's HVAC

5.0(17)

All four featured reviewers award 5 stars, with three specifically naming David and praising his honesty,…

493 Vine Ave, Sunnyvale, CA 94086
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Spark Heating & Cooling

5.0(10)
24/7

Eight of eight reviews award five-star ratings, with no lower scores present to balance the feedback. Common…

760 Peach Ave, Sunnyvale, CA 94087
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Home Services at The Home Depot

3.4(17)

Four of eight verifiable reviews carry five-star ratings citing helpful staff and good service experiences,…

680 Kifer Rd, Sunnyvale, CA 94086
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SwiftBreeze HVAC Solutions

5.0(5)

All five published reviews award the maximum five-star rating, with customers specifically mentioning…

1119 Blazingwood Dr, Sunnyvale, CA 94089

HVAC All Seasons

5.0(4)

All four reviews award five stars, with two clients specifically naming technicians who exceeded…

1225 Vienna Dr, Sunnyvale, CA 94089
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Top Solutions Cooling & Heating

0.0
710 Lakeway Dr #223, Sunnyvale, CA 94085
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AC Replacement Costs in Sunnyvale

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

ServiceLowAverageHigh
Central AC (3-ton, basic)
$5,060$7,360$10,120
Central AC (4-ton, mid-efficiency)
$6,900$9,660$12,880
Central AC (5-ton, high-efficiency)
$8,740$11,500$14,720
Full HVAC system (AC + furnace)
$10,663$12,356$12,972
Plus ductwork replacement
If existing ducts are aged/leaking
$1,932$2,760$3,680
Repair cost threshold50% rule: if repair > 50% of replacement, replace

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

AC Replacement in Sunnyvale, CA: What to Expect

Living in Sunnyvale means dealing with a mild Mediterranean climate where summer temperatures hover around 82 degrees, yet heat waves can push local temperatures well past 100 degrees in certain neighborhoods. This creates a real need for reliable AC Replacement in Sunnyvale, especially during those occasional extreme stretches when cooling becomes essential rather than optional. Homeowners in the South Bay have access to eleven licensed contractors serving the area, collectively earning an average rating of 4.3 based on over four hundred customer reviews, giving residents solid options when their cooling systems falter.

Investing in a new central air conditioning system involves specific costs that depend on capacity and efficiency. For instance, a basic 3-ton central AC unit typically ranges from $5,060 to $10,120, while a mid-efficiency 4-ton system runs between $6,900 and $12,880. High-efficiency 5-ton units can reach $8,740 to $14,720. Every legitimate contractor in California must hold a C-20 Warm-Air Heating, Ventilating, and Air-Conditioning Contractor license issued by the Contractors State License Board, ensuring baseline competency before tackling any installation.

Customer feedback reveals patterns that matter when choosing a provider. United Plumbing & Water Heaters maintains a perfect 5.0 rating across all 133 reviews, with multiple clients specifically noting technician Alton for emergency responses and same-day service availability. Green Tree Household Services similarly achieves 5-star ratings from every reviewer, with eight customers describing specific repair situations resolved promptly. These sustained patterns suggest that responsiveness and reliable craftsmanship drive satisfaction more than pricing alone.

Frequently Asked Questions

AC replacement in Sunnyvale runs $1,932-$14,720 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 Sunnyvale, CA

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