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Emergency HVAC Contractors in Hercules, CA (2026)

Top 50 of 429 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 Hercules: 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 Hercules at a glance

Top emergency HVAC contractors in Hercules at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Service Champions664.9★ (5,220)Martinez, 11 mi away24/7
2Albert Nahman Plumbing, Heating, and Cooling644.7★ (3,311)Berkeley, 12 mi away24/7
3Hometown Heating and Air Conditioning644.9★ (2,463)Concord, 13 mi away24/7
4Freschi Service Experts624.8★ (1,046)Concord, 14 mi away24/7
5Perfect Star Heating, Cooling, & Electrical624.9★ (1,255)Concord, 17 mi away24/7
6Ongaro & Sons624.9★ (762)San Anselmo, 15 mi away24/7
7Chill Heating and Cooling625.0★ (481)Walnut Creek, 14 mi away24/7
8Bellows Plumbing, Heating, Cooling & Electrical614.9★ (480)Novato, 14 mi away24/7
9Perfect Star Heating, Cooling, & Electrical614.9★ (2,331)Antioch, 24 mi away24/7
10Heise's Plumbing614.9★ (1,454)San Francisco, 22 mi away24/7

Call an emergency HVAC contractor in Hercules 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 Hercules, 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 429 is on the HVAC contractors page.

Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  1. Ranked #1 in Hercules

    #1 Service Champions

    Based in Martinez, 11 mi away

    66/100CR Score

    Ranked #1 because of its Google rating and review volume: 4.9★ from 5,220 Google reviews.

    • 4.9★ from 5,220 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    261 Arthur Rd, Martinez, CA 94553
    View profile for Service Champions(925) 281-0532

  6. #6 Ongaro & Sons

    Based in San Anselmo, 15 mi away

    62/100CR Score

    Ranked #6 because of its Google rating and trade focus: 4.9★ from 762 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 762 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    11 Ross Ave, San Anselmo, CA 94960
    View profile for Ongaro & Sons(415) 523-3755

  10. #10 Heise's Plumbing

    Based in San Francisco, 22 mi away

    61/100CR Score

    Ranked #10 because of its Google rating and trade focus: 4.9★ from 1,454 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 1,454 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    260 Ocean Ave, San Francisco, CA 94112
    View profile for Heise's Plumbing(415) 333-0704

  15. #15 Fuse Service

    Based in Richmond, 8 mi away

    60/100CR Score

    Ranked #15 because of its Google rating and trade focus: 4.9★ from 94 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 94 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    173 Lakeshore Ct, Richmond, CA 94804
    View profile for Fuse Service(415) 234-1807

  17. #17 Local Plumbing

    Based in Sausalito, 15 mi away

    60/100CR Score

    Ranked #17 because of its Google rating and trade focus: 5.0★ from 211 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 211 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    323 Pine St Ste. F, Sausalito, CA 94965
    View profile for Local Plumbing(415) 636-9210

  20. #20 Cali HVAC

    Based in Concord, 13 mi away

    59/100CR Score

    Ranked #20 because of its Google rating and trade focus: 5.0★ from 97 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 97 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1717 Solano Way STE 2, Concord, CA 94520
    View profile for Cali HVAC(925) 775-5557

  21. #21 Arch Plumbing Inc.

    Based in San Francisco, 20 mi away

    59/100CR Score

    Ranked #21 because of its Google rating and trade focus: 4.9★ from 286 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 286 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    121 Quint St STE 5E, San Francisco, CA 94124
    View profile for Arch Plumbing Inc.(415) 325-2547

  25. #25 1-888-Heat-Pumps

    Based in Berkeley, 11 mi away

    59/100CR Score

    Ranked #25 because of its Google rating and trade focus: 5.0★ from 45 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 45 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1826 Prince St, Berkeley, CA 94703
    View profile for 1-888-Heat-Pumps(888) 432-8786

Top 50 of 429 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 Hercules, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26O.s heating & Air Conditioning585.0★ (17)5 mi
27Fuse Service584.9★ (54)14 mi
28EHC HEATING AND COOLING584.7★ (55)13 mi
29San Francisco Expert Heating and Air584.9★ (69)16 mi
30Green Air Heating and Air Conditioning, Inc.584.6★ (69)14 mi
31Smart Heating and Air Conditioning585.0★ (151)22 mi
32EHC HEATING&COOLING584.0★ (4)In Hercules
33AC & Heating Solutions574.9★ (73)18 mi
34California HVAC574.9★ (59)17 mi
35Afterglow574.9★ (47)16 mi
36Alameda Island Heating & Air Conditioning LLC575.0★ (32)14 mi
37Alaska Refrigeration Air Conditioning & Heating Co574.9★ (130)23 mi
38Rooter Hero Plumbing & Air of San Lorenzo574.7★ (265)24 mi
39One Hour Heating & Air Conditioning575.0★ (26)14 mi
40Climate Source HVAC/R LLC574.9★ (29)14 mi
41Eco Systems Heating & Air Conditioning574.8★ (138)23 mi
42Comfy Heating & Air Conditioning Inc.574.8★ (111)23 mi
43Up & Above Heating and Cooling574.9★ (67)21 mi
44Estes Refrigeration, Inc.574.0★ (10)7 mi
45Temescal AC Repair565.0★ (62)22 mi
46Five Or Free Electrical Heating & Air Solutions564.8★ (219)13 mi
47Palma Super Cold HVAC565.0★ (8)10 mi
48A&B Kenmore Appliance Repair564.9★ (30)18 mi
49Dormatech Mechanical Systems, Inc.563.4★ (5)7 mi
50BV Mechanical Services LLC.565.0★ (5)9 mi

How we ranked emergency HVAC contractors in Hercules

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. 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
Reputation15%Google star rating, adjusted for how many reviews back it
Credentials15%Active state license, bond and workers’ comp on file
Review volume10%Number of Google reviews, compared with the most-reviewed business on the list
Recency5%Share of reviews from the last 12 months
Availability15%Weekly open hours, Saturday, Sunday, 24/7 or same-day
Trade focus10%How clearly the business does this trade (its Google category and name)
Proximity5%Based in the city scores highest, less the farther away it is
Claimed profile10%The business has claimed its ContractorsRanked profile (free or paid earn the same)
Partnered5%The business links to ContractorsRanked from its own website with our badge, checked periodically
ContractorsRanked reviews10%Verified customer reviews collected by ContractorsRanked: their rating and how many there are

Emergency HVAC contractors in Hercules: questions

Which HVAC contractors in Hercules are open 24/7?

25 on this list post 24/7 hours, including Service Champions, Albert Nahman Plumbing, Heating, and Cooling, Hometown Heating and Air Conditioning, Freschi Service Experts and Perfect Star Heating, Cooling, & Electrical.

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

Service Champions is #1, with a CR Score of 66 out of 100 on emergency weights.

How are emergency HVAC contractors in Hercules ranked?

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. 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?

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

Update log for Hercules

  1. October 2026: CR Scores recalculated for 429 hvac contractors serving Hercules.
  2. October 2026: 4 duplicate listings merged.

More emergency and heating and cooling pages