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Emergency HVAC Contractors in Mercedes, TX (2026)

Top 50 of 168 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 Mercedes: CAM AIR A/C & HEATING LLC, 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 Mercedes at a glance

Top emergency HVAC contractors in Mercedes at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1CAM AIR A/C & HEATING LLC634.8★ (110)Mercedes24/7
2Polar Air | Air Conditioning & Heating625.0★ (732)Pharr, 18 mi away24/7
3Prime Air HVAC & $149 Duct Cleaning625.0★ (866)McAllen, 20 mi away24/7
4Millennium A/C615.0★ (1,058)Mission, 24 mi away24/7
5Cytech Heating & Cooling614.9★ (646)Edinburg, 21 mi away24/7
6Infinity AC Service LLC.615.0★ (234)San Juan, 15 mi away24/7
7General HVAC LLC604.9★ (130)Harlingen, 14 mi away24/7
8Infinity Air Heating & Cooling LLC605.0★ (39)Alamo, 6 mi away24/7
9Enterprise Air Conditioning & Refrigeration604.1★ (30)Mercedes24/7
10Mighty Mike's Plumbing, Electrical & HVAC604.9★ (2,689)Pharr, 19 mi away24/7

Call an emergency HVAC contractor in Mercedes 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 Mercedes, 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 168 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.

  4. #4 Millennium A/C

    Based in Mission, 24 mi away

    61/100CR Score

    Ranked #4 because of its Google rating and trade focus: 5.0★ from 1,058 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 1,058 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    715 N Glasscock Rd Ste 20, Mission, TX 78572
    View profile for Millennium A/C(956) 300-3819

  7. #7 General HVAC LLC

    Based in Harlingen, 14 mi away

    60/100CR Score

    Ranked #7 because of its Google rating and trade focus: 4.9★ from 130 Google reviews, listed on Google as “Air conditioning contractor”.

    • 4.9★ from 130 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1414 TX-499 Loop, Harlingen, TX 78550
    View profile for General HVAC LLC(956) 343-7712

  13. #13 A/C AMIGO LLC

    Based in McAllen, 22 mi away

    59/100CR Score

    Ranked #13 because of its Google rating and trade focus: 4.9★ from 224 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 224 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    3218 Balboa Ave, McAllen, TX 78503
    View profile for A/C AMIGO LLC(956) 984-8182

  22. #22 Val-Air Llc

    Based in Edinburg, 19 mi away

    58/100CR Score

    Ranked #22 because of its Google rating and trade focus: 5.0★ from 78 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 78 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    5502 S Alquds Ave, Edinburg, TX 78539
    View profile for Val-Air Llc(956) 609-9020

Top 50 of 168 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 Mercedes, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Air Cool Tech ACT Corp.574.5★ (31)13 mi
27Farrell Plumbing & Cooling Inc.574.5★ (77)4 mi
28Reliable Kitchen Services574.4★ (7)6 mi
29Climate Solutions Air Conditioning & Refrigeration575.0★ (4)5 mi
30Terra Cooling574.4★ (20)12 mi
31Speedy Cooling LLC575.0★ (14)13 mi
32Freedom Air & Refrigeration574.7★ (57)21 mi
33Central Air & Heating Service Inc. Main Warehouse563.8★ (17)13 mi
34QUALITY AIR564.6★ (19)17 mi
35Gulf coast hvac565.0★ (16)19 mi
36Master Service llc , A/C Repair , Ice Machine Repair , Walk in Cooler And Freezer Repair554.4★ (7)13 mi
37Air Master Heating & Cooling A/C Service, Repair, Installs RGV554.9★ (15)18 mi
38GALO HVAC Systems555.0★ (12)18 mi
39Precision Air Heating and Cooling555.0★ (27)25 mi
40Exothermic Refrigeration & AC555.0★ (11)19 mi
41TAS Air Conditioning and Heating554.7★ (404)6 mi
42Magic Air LLC545.0★ (10)20 mi
43Colair Inc545.0★ (8)20 mi
44Xpress A/C & Refrigeration, LLC545.0★ (4)17 mi
45Guzman Cooling & Heating LLC545.0★ (5)18 mi
46Guzman A/C Heating & Cooling535.0★ (4)19 mi
47Fern's AC525.0★ (25)In Mercedes
48General HVAC LLC515.0★ (8)18 mi
49RK's-Air, LLC504.3★ (11)In Mercedes
50Ace Electric Construction and plumbing 24 hour emergency service calls494.7★ (15)17 mi

How we ranked emergency HVAC contractors in Mercedes

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 Mercedes: questions

Which HVAC contractors in Mercedes are open 24/7?

25 on this list post 24/7 hours, including CAM AIR A/C & HEATING LLC, Polar Air | Air Conditioning & Heating, Prime Air HVAC & $149 Duct Cleaning, Millennium A/C and Cytech Heating & Cooling.

Who is ranked #1 for emergency heating and cooling in Mercedes, TX?

CAM AIR A/C & HEATING LLC is #1, with a CR Score of 63 out of 100 on emergency weights.

How are emergency HVAC contractors in Mercedes 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 Mercedes

  1. October 2026: CR Scores recalculated for 168 hvac contractors serving Mercedes.

More emergency and heating and cooling pages