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Emergency HVAC Contractors in Cupertino, CA (2026)

Top 50 of 449 HVAC contractors, in emergency orderUpdated 0 paid placements in this rankingHow we rank

25 of the 50 HVAC contractors on this list post 24/7 hours. 24/7 businesses come first, then same-day, each ranked by CR Score with availability weighted higher.

If you smell gas, leave the building now and call your gas utility or 911 from outside.

The short answer

  1. 1

    #1 for emergency heating and cooling in Cupertino: Service Champions, open 24/7.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

Top emergency HVAC contractors in Cupertino at a glance

Top emergency HVAC contractors in Cupertino at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Service Champions944.9★ (3,407)San Jose, 9 mi away24/7
2Fuse HVAC, Refrigeration, Electrical & Plumbing934.9★ (1,034)Santa Clara, 5 mi away24/7
3TRIO Heating, Air & Plumbing934.9★ (1,142)San Jose, 8 mi away24/7
4IRBIS Air Plumbing Electrical934.9★ (1,466)San Jose, 9 mi away24/7
5Fuse914.9★ (400)San Jose, 6 mi away24/7
6Same Day Air Conditioning & Heating914.7★ (550)Sunnyvale, 4 mi away24/7
7Heating And Air Experts - Affordable HVAC Contractor in Fremont, California915.0★ (761)Fremont, 14 mi away24/7
8Atlas Trillo914.6★ (1,308)San Jose, 8 mi away24/7
9Air Care Heating & Cooling Inc.914.9★ (426)San Jose, 9 mi away24/7
10Fuse service915.0★ (444)Palo Alto, 11 mi away24/7

Call an emergency HVAC contractor in Cupertino now

24/7 hours mean the business says its phone is answered around the clock. Arrival time depends on where the crew is. Ask for an arrival window when you call.

The 50 emergency HVAC contractors in Cupertino, ranked

24/7 first, then same-day service, then the rest. Each group is in CR Score order on emergency weights. The full ranking of all 449 is on the HVAC contractors page.

Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  1. Ranked #1 in Cupertino

    #1 Service Champions

    Based in San Jose, 9 mi away

    94/100CR Score

    Ranked #1 because of its Google rating and review volume: 4.9★ from 3,407 Google reviews, 3,407 Google reviews.

    • 4.9★ from 3,407 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2161 Del Franco St, San Jose, CA 95131
    View profile for Service Champions(408) 549-7376

  5. #5 Fuse

    Based in San Jose, 6 mi away

    91/100CR Score

    Ranked #5 because of its Google rating and availability: 4.9★ from 400 Google reviews, open 24/7.

    • 4.9★ from 400 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2512 Seaboard Ave, San Jose, CA 95131
    View profile for Fuse(669) 240-1243

  8. #8 Atlas Trillo

    Based in San Jose, 8 mi away

    91/100CR Score

    Ranked #8 because of its Google rating and availability: 4.6★ from 1,308 Google reviews, open 24/7.

    • 4.6★ from 1,308 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2305 Paragon Dr, San Jose, CA 95131
    View profile for Atlas Trillo(408) 675-1924

  10. #10 Fuse service

    Based in Palo Alto, 11 mi away

    91/100CR Score

    Ranked #10 because of its Google rating and availability: 5.0★ from 444 Google reviews, open 24/7.

    • 5.0★ from 444 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    349 Everett Ave, Palo Alto, CA 94301
    View profile for Fuse service(408) 412-9334

  11. #11 Fuse Service

    Based in Santa Clara, 6 mi away

    91/100CR Score

    Ranked #11 because of its Google rating and availability: 4.9★ from 273 Google reviews, open 24/7.

    • 4.9★ from 273 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1221 Sherwood Ave, Santa Clara, CA 95050
    View profile for Fuse Service(408) 412-0203

  20. #20 Fuse Service

    Based in San Mateo, 9 mi away

    90/100CR Score

    Ranked #20 because of its Google rating and availability: 4.9★ from 217 Google reviews, open 24/7.

    • 4.9★ from 217 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    3 37th Ave W, San Mateo, CA 94403
    View profile for Fuse Service(669) 240-1215

  21. #21 HVAC Gurus

    Based in San Jose, 9 mi away

    90/100CR Score

    Ranked #21 because of its Google rating and availability: 4.7★ from 439 Google reviews, open 24/7.

    • 4.7★ from 439 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    75 Phelan Ave Unit 6, San Jose, CA 95112
    View profile for HVAC Gurus(408) 499-0494

  23. #23 Best HVAC

    Based in Lodi, 6 mi away

    89/100CR Score

    Ranked #23 because of its Google rating and availability: 4.8★ from 153 Google reviews, open 24/7.

    • 4.8★ from 153 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Best HVAC

Top 50 of 449 HVAC contractors by emergency score

#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile.

HVAC contractors in Cupertino, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Freon Service894.9★ (219)11 mi
27Golden Comfort AC & Heating Repair895.0★ (85)7 mi
28Silicon Valley Comfort894.9★ (134)8 mi
29Bellows Plumbing, Heating, Cooling & Electrical894.7★ (159)6 mi
30TRIO Heating, Air & Plumbing894.9★ (145)10 mi
31Cabrillo Plumbing, Heating & Air895.0★ (208)14 mi
32Aire Serv of Campbell and Saratoga894.9★ (127)10 mi
33Trio Heating & Air Hayward895.0★ (148)8 mi
34Pacific Coast Home Services884.4★ (735)10 mi
35Bellows Plumbing, Heating, Cooling & Electrical884.8★ (1,428)24 mi
36Finest Heating & air884.9★ (87)10 mi
37EVS MECHANICAL INC885.0★ (36)6 mi
38Tempro885.0★ (48)8 mi
39Bell Brothers Plumbing Heating & Air - Hayward874.7★ (863)22 mi
40Advanced Technical Hvac875.0★ (54)10 mi
41Alliance Air Service874.9★ (37)8 mi
42MaxSeal LLC875.0★ (24)6 mi
43Mr. Reliable Plumbing & Heating874.7★ (55)8 mi
44Freon Heating and Cooling875.0★ (24)6 mi
45Fuse Service874.9★ (264)21 mi
46Heating and Air874.5★ (62)6 mi
47Upgrade Home Services875.0★ (21)5 mi
48Electric Air875.0★ (72)15 mi
49Glover & Son Heating & Air Conditioning [Recommended] Bay Area AC Repair874.8★ (122)15 mi
50Around the Clock Service, Inc.874.5★ (34)4 mi

How we ranked emergency HVAC contractors in Cupertino

Emergency lists move 10 points of the CR Score from reputation to availability: 25% and 20%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 HVAC contractors are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed from
Reputation25%Bayesian-adjusted Google star rating
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2
Review volume10%log10(reviews + 1) against the list maximum
Recency10%Share of reviews from the last 12 months
Availability20%Weekly open hours, Saturday, Sunday, 24/7 or same-day
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radius
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)

Emergency HVAC contractors in Cupertino: questions

Which HVAC contractors in Cupertino are open 24/7?

25 on this list post 24/7 hours, including Service Champions, Fuse HVAC, Refrigeration, Electrical & Plumbing, TRIO Heating, Air & Plumbing, IRBIS Air Plumbing Electrical and Fuse.

Who is ranked #1 for emergency heating and cooling in Cupertino, CA?

Service Champions is #1, with a CR Score of 94 out of 100 on emergency weights.

How are emergency HVAC contractors in Cupertino ranked?

Emergency lists move 10 points of the CR Score from reputation to availability: 25% and 20%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 HVAC contractors are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

What should I do before the HVAC contractor arrives?

If you smell gas, leave the building now and call your gas utility or 911 from outside.

How many emergency HVAC contractors here list a phone number?

24 of the 25 businesses ranked in full list a phone number. Tap Call to dial it.

Update log for Cupertino

  1. October 2026: CR Scores recalculated for 449 hvac contractors serving Cupertino.
  2. October 2026: 4 duplicate listings merged.

More emergency and heating and cooling pages