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Emergency HVAC Contractors in San Mateo, CA (2026)

Top 50 of 463 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 San Mateo: 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 San Mateo at a glance

Top emergency HVAC contractors in San Mateo at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Fuse Service644.9★ (264)San Mateo24/7
2Fuse Service644.9★ (217)San Mateo24/7
3Heise's Plumbing634.9★ (1,454)San Francisco, 13 mi away24/7
4Cabrillo Plumbing, Heating & Air634.9★ (966)San Francisco, 13 mi away24/7
5Sugar Bear Home Services634.9★ (369)South San Francisco, 7 mi away24/7
6Albert Nahman Plumbing, Heating, and Cooling624.7★ (3,311)Berkeley, 20 mi away24/7
7Fuse service625.0★ (444)Palo Alto, 12 mi away24/7
8Bell Brothers Plumbing Heating & Air - Hayward624.7★ (863)Hayward, 12 mi away24/7
9Service Hero Plumbing & Air624.5★ (1,252)Hayward, 13 mi away24/7
10Cabrillo Plumbing, Heating & Air625.0★ (208)Menlo Park, 9 mi away24/7

Call an emergency HVAC contractor in San Mateo 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 San Mateo, 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 463 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 San Mateo

    #1 Fuse Service

    Based in San Mateo

    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 Fuse Service

    Based in San Mateo

    64/100CR Score

    Ranked #2 because of its Google rating and trade focus: 4.9★ from 217 Google reviews, listed on Google as “HVAC contractor”.

    • 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

  3. #3 Heise's Plumbing

    Based in San Francisco, 13 mi away

    63/100CR Score

    Ranked #3 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

  7. #7 Fuse service

    Based in Palo Alto, 12 mi away

    62/100CR Score

    Ranked #7 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

  15. #15 Service Champions

    Based in Pleasanton, 24 mi away

    61/100CR 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

  16. #16 Arch Plumbing Inc.

    Based in San Francisco, 13 mi away

    61/100CR Score

    Ranked #16 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

  17. #17 Belmont HVAC Pro

    Based in Belmont, 4 mi away

    61/100CR Score

    Ranked #17 because of its Google rating and trade focus: 4.7★ from 75 Google reviews, listed on Google as “HVAC contractor”.

    • 4.7★ from 75 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2820 Hallmark Dr, Belmont, CA 94002
    View profile for Belmont HVAC Pro(650) 226-7222

  22. #22 Villquin Air Services

    Based in Hayward, 13 mi away

    60/100CR Score

    Ranked #22 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

  23. #23 Electric Air

    Based in Redwood City, 9 mi away

    60/100CR Score

    Ranked #23 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 463 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 San Mateo, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26TRIO Heating, Air & Plumbing604.9★ (145)14 mi
27Same Day Air Conditioning & Heating604.7★ (550)20 mi
28Comfy Heating & Air Conditioning Inc.594.8★ (111)13 mi
29Fuse HVAC, Refrigeration, Electrical & Plumbing594.9★ (216)18 mi
30Finest Heating & air594.9★ (87)14 mi
31HVAC Redwood City595.0★ (33)9 mi
32Fuse584.9★ (400)25 mi
33Glover & Son Heating & Air Conditioning [Recommended] Bay Area AC Repair584.8★ (122)16 mi
34Local Plumbing585.0★ (211)22 mi
351st Heating And Cooling East Palo Alto585.0★ (46)12 mi
36Alaska Refrigeration Air Conditioning & Heating Co584.9★ (130)19 mi
37Eco Air Cooling and Heating585.0★ (28)9 mi
38Southgate HVAC Solutions585.0★ (28)10 mi
39Sam's Refrigeration & AC INC585.0★ (5)In San Mateo
40Trusted AC Repair Palo Alto585.0★ (36)12 mi
41Excellent Repair584.8★ (43)13 mi
42Roofsky Air Duct Cleaning Service585.0★ (17)8 mi
43California HVAC584.9★ (59)16 mi
44San Francisco Expert Heating and Air584.9★ (69)17 mi
45Green Mechanics Heating & AC Repair Specialists574.9★ (74)19 mi
46The Clean Sky HVAC and Appliance Repair575.0★ (37)15 mi
47Professional HVAC Contractor San Mateo575.0★ (38)In San Mateo
48Afterglow574.9★ (47)16 mi
49Lunar Air Systems574.9★ (35)14 mi
50Superior HVAC Contractor Palo Alto575.0★ (31)14 mi

How we ranked emergency HVAC contractors in San Mateo

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 San Mateo: questions

Which HVAC contractors in San Mateo are open 24/7?

25 on this list post 24/7 hours, including Fuse Service, Fuse Service, Heise's Plumbing, Cabrillo Plumbing, Heating & Air and Sugar Bear Home Services.

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

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

How are emergency HVAC contractors in San Mateo 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 San Mateo

  1. October 2026: CR Scores recalculated for 463 hvac contractors serving San Mateo.
  2. October 2026: 3 duplicate listings merged.

More emergency and heating and cooling pages