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Emergency HVAC Contractors in Foster City, CA (2026)

Top 50 of 538 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 Foster City: Fuse Service, 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 Foster City at a glance

Top emergency HVAC contractors in Foster City at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Fuse Service644.9★ (264)San Mateo, 2 mi away24/7
2Heise's Plumbing634.9★ (1,454)San Francisco, 15 mi away24/7
3Fuse service635.0★ (444)Palo Alto, 10 mi away24/7
4Bell Brothers Plumbing Heating & Air - Hayward634.7★ (863)Hayward, 10 mi away24/7
5Service Hero Plumbing & Air624.5★ (1,252)Hayward, 10 mi away24/7
6Cabrillo Plumbing, Heating & Air624.9★ (966)San Francisco, 15 mi away24/7
7Cabrillo Plumbing, Heating & Air625.0★ (208)Menlo Park, 7 mi away24/7
8Sugar Bear Home Services624.9★ (369)South San Francisco, 9 mi away24/7
9Service Champions624.9★ (3,407)San Jose, 23 mi away24/7
10Albert Nahman Plumbing, Heating, and Cooling624.7★ (3,311)Berkeley, 20 mi away24/7

Call an emergency HVAC contractor in Foster City 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 Foster City, 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 538 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 Foster City

    #1 Fuse Service

    Based in San Mateo, 2 mi away

    64/100CR Score

    Ranked #1 because of its Google rating and trade focus: 4.9★ from 264 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 264 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    3 37th Ave, San Mateo, CA 94403
    View profile for Fuse Service(408) 702-2554

  2. #2 Heise's Plumbing

    Based in San Francisco, 15 mi away

    63/100CR Score

    Ranked #2 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

  3. #3 Fuse service

    Based in Palo Alto, 10 mi away

    63/100CR Score

    Ranked #3 because of its Google rating and trade focus: 5.0★ from 444 Google reviews, listed on Google as “HVAC contractor”.

    • 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

  9. #9 Service Champions

    Based in San Jose, 23 mi away

    62/100CR Score

    Ranked #9 because of its Google rating and trade focus: 4.9★ from 3,407 Google reviews, listed on Google as “HVAC contractor”.

    • 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

  15. #15 Service Champions

    Based in Pleasanton, 22 mi away

    62/100CR Score

    Ranked #15 because of its Google rating and trade focus: 4.8★ from 2,337 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 2,337 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    7020 Commerce Dr, Pleasanton, CA 94588
    View profile for Service Champions(925) 248-3458

  19. #19 Villquin Air Services

    Based in Hayward, 10 mi away

    61/100CR Score

    Ranked #19 because of its Google rating and trade focus: 4.9★ from 172 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 172 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    27343 Industrial Blvd Suite H, Hayward, CA 94545
    View profile for Villquin Air Services(510) 405-1580

  24. #24 Arch Plumbing Inc.

    Based in San Francisco, 15 mi away

    61/100CR Score

    Ranked #24 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 Electric Air

    Based in Redwood City, 7 mi away

    61/100CR Score

    Ranked #25 because of its Google rating and trade focus: 5.0★ from 72 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 72 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2684 Middlefield Rd Unit D, Redwood City, CA 94063
    View profile for Electric Air(650) 670-4860

Top 50 of 538 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 Foster City, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Fuse HVAC, Refrigeration, Electrical & Plumbing614.9★ (1,034)22 mi
27Belmont HVAC Pro604.7★ (75)4 mi
28Rooter Hero Plumbing & Air of San Lorenzo604.7★ (265)12 mi
29TRIO Heating, Air & Plumbing604.9★ (1,142)24 mi
30TRIO Heating, Air & Plumbing604.9★ (145)11 mi
31Same Day Air Conditioning & Heating604.7★ (550)17 mi
32Fuse HVAC, Refrigeration, Electrical & Plumbing604.9★ (216)16 mi
33Atlas Trillo604.6★ (1,308)23 mi
34Comfy Heating & Air Conditioning Inc.604.8★ (111)12 mi
35Finest Heating & air604.9★ (87)11 mi
36Comfy Heating & Air Conditioning594.9★ (602)24 mi
37Glover & Son Heating & Air Conditioning [Recommended] Bay Area AC Repair594.8★ (122)13 mi
38HVAC Redwood City595.0★ (33)7 mi
391st Heating And Cooling East Palo Alto595.0★ (46)9 mi
40Fuse594.9★ (400)22 mi
41Eco Air Cooling and Heating595.0★ (28)7 mi
42Alaska Refrigeration Air Conditioning & Heating Co594.9★ (130)17 mi
43ARS/ Rescue Rooter594.7★ (546)23 mi
44Trusted AC Repair Palo Alto595.0★ (36)10 mi
45Excellent Repair584.8★ (43)11 mi
46Fuse Service584.9★ (273)24 mi
47Roofsky Air Duct Cleaning Service585.0★ (17)7 mi
48Local Plumbing585.0★ (211)24 mi
49Lunar Air Systems584.9★ (35)11 mi
50The Clean Sky HVAC and Appliance Repair585.0★ (37)12 mi

How we ranked emergency HVAC contractors in Foster City

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 Foster City: questions

Which HVAC contractors in Foster City are open 24/7?

25 on this list post 24/7 hours, including Fuse Service, Heise's Plumbing, Fuse service, Bell Brothers Plumbing Heating & Air - Hayward and Service Hero Plumbing & Air.

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

Fuse Service is #1, with a CR Score of 64 out of 100 on emergency weights.

How are emergency HVAC contractors in Foster City 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 Foster City

  1. October 2026: CR Scores recalculated for 538 hvac contractors serving Foster City.
  2. October 2026: 6 duplicate listings merged.

More emergency and heating and cooling pages