481 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in San Marcos: Action Air Conditioning & Heating, CR Score 67/100; 4.9★ from 3,896 Google reviews; open 24/7.
Best for emergencies (open 24/7): Sherlock Plumbing, Heating & Air, posts 24/7 hours; ranked #2 of 481.
Most-reviewed: ASI, The White Glove Guys, 7,073 Google reviews at 4.8★, the most of 481 ranked; ranked #43.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
481 San Marcos HVAC contractors are ranked here by CR Score, from ten published factors. 147 are open 24/7, 344 open Saturdays and 250 open Sundays, based on posted hours. The median Google rating is 5.0★ across 481 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Action Air Conditioning & Heating | 67 | 4.9★ (3,896) | San Marcos | 24/7 | Overall |
| 2 | Sherlock Plumbing, Heating & Air | 66 | 4.9★ (4,132) | Carlsbad, 4 mi away | 24/7 | Emergencies |
| 3 | Anderson Plumbing, Heating & Air | 66 | 4.8★ (2,810) | San Marcos | 24/7 | — |
| 4 | John Stevenson Plumbing, Heating & Air Conditioning | 65 | 4.8★ (2,898) | Carlsbad, 5 mi away | 24/7 | — |
| 5 | Mauzy Cooling, Heating, Plumbing, and Electrical | 65 | 4.8★ (1,303) | Escondido, 2 mi away | 24/7 | — |
| 6 | We Care Plumbing Heating and Air | 63 | 4.8★ (1,139) | San Marcos | Sat · Sun · Evenings | — |
| 7 | Veterans Heating and Air Conditioning, Plumbing, and Electrical | 63 | 5.0★ (601) | Oceanside, 9 mi away | 24/7 | — |
| 8 | My Guy Heating, Air & Plumbing | 63 | 4.9★ (360) | Escondido, 4 mi away | 24/7 | — |
| 9 | Personal Plumbing Heating & Air Conditioning | 63 | 4.9★ (1,305) | Oceanside, 11 mi away | 24/7 | — |
| 10 | Excel Air Conditioning, Heating & Plumbing | 63 | 4.9★ (222) | Escondido, 3 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 because of its Google rating and trade focus: 4.9★ from 3,896 Google reviews, listed on Google as “HVAC contractor”.
Based in Carlsbad, 4 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 4,132 Google reviews, listed on Google as “HVAC contractor”.
Based in San Marcos
Ranked #3 because of its Google rating and trade focus: 4.8★ from 2,810 Google reviews, listed on Google as “HVAC contractor”.
Based in Carlsbad, 5 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 2,898 Google reviews, listed on Google as “HVAC contractor”.
Based in Escondido, 2 mi away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 1,303 Google reviews, listed on Google as “HVAC contractor”.
Based in San Marcos
Ranked #6 because of its Google rating and trade focus: 4.8★ from 1,139 Google reviews, listed on Google as “HVAC contractor”.
Based in Oceanside, 9 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 601 Google reviews, listed on Google as “HVAC contractor”.
Based in Escondido, 4 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 360 Google reviews, listed on Google as “HVAC contractor”.
Based in Oceanside, 11 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 1,305 Google reviews, listed on Google as “HVAC contractor”.
Based in Escondido, 3 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 222 Google reviews, listed on Google as “HVAC contractor”.
Based in Vista, 6 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 338 Google reviews, listed on Google as “HVAC contractor”.
Based in Vista, 4 mi away
Ranked #12 because of its Google rating and trade focus: 4.7★ from 402 Google reviews, listed on Google as “HVAC contractor”.
Based in Oceanside, 10 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 426 Google reviews, listed on Google as “HVAC contractor”.
Based in Oceanside, 8 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 1,197 Google reviews, listed on Google as “HVAC contractor”.
Based in San Diego, 21 mi away
Ranked #15 because of its Google rating and trade focus: 4.8★ from 6,056 Google reviews, listed on Google as “HVAC contractor”.
Based in San Diego, 18 mi away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 1,612 Google reviews, listed on Google as “HVAC contractor”.
Based in San Diego, 23 mi away
Ranked #17 because of its Google rating and trade focus: 4.8★ from 4,875 Google reviews, listed on Google as “HVAC contractor”.
Based in Escondido, 5 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 209 Google reviews, listed on Google as “HVAC contractor”.
Based in El Cajon, 25 mi away
Ranked #19 because of its Google rating and trade focus: 4.8★ from 4,443 Google reviews, listed on Google as “HVAC contractor”.
Based in San Marcos
Ranked #20 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “HVAC contractor”.
Based in Vista, 7 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 1,124 Google reviews, listed on Google as “HVAC contractor”.
Based in San Diego, 18 mi away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 815 Google reviews, listed on Google as “HVAC contractor”.
Based in Oceanside, 9 mi away
Ranked #23 because of its Google rating and trade focus: 4.7★ from 237 Google reviews, listed on Google as “HVAC contractor”.
Based in San Diego, 22 mi away
Ranked #24 because of its Google rating and trade focus: 4.8★ from 1,658 Google reviews, listed on Google as “HVAC contractor”.
Based in Escondido, 7 mi away
Ranked #25 because of its Google rating and trade focus: 4.8★ from 94 Google reviews, listed on Google as “HVAC contractor”.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 481 ranked HVAC contractors here; the rest are on their profiles.
20 more HVAC contractors within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| Action Commercial HVAC | In San Marcos | |
| Air Quality Control Heating and Air conditioning | 5.0★ (53) | 12 mi |
| Airtime Heating and Air | 5.0★ (151) | 22 mi |
| CALCOAST HVAC L.L.C. | 5.0★ (3) | In San Marcos |
| Comfort Bros Heating Air Plumbing & Electrical | 4.9★ (424) | 24 mi |
| D-S-P Business Solutions | In San Marcos | |
| FASTECH — Fueling and Energy Solutions | 5.0★ (1) | In San Marcos |
| Hvac Dinosaur heating and air conditioning | In San Marcos | |
| Liebert Corporation | In San Marcos | |
| Metropolitan Services, Inc. | In San Marcos | |
| Plotke Plumbing & Heating | 4.7★ (83) | In San Marcos |
| Precision Air Inc | 4.0★ (2) | 6 mi |
| Precision Escondido HVAC Repair | 5.0★ (21) | 7 mi |
| Progressive Heating & Air | 4.8★ (240) | 22 mi |
| Pure Air San Diego | 5.0★ (2) | 7 mi |
| Smith & Sons Heating and Air Inc. | 5.0★ (203) | 22 mi |
| Trusted Vista HVAC Services | 5.0★ (15) | 4 mi |
| Valley Center Air Conditioning | 5.0★ (61) | 14 mi |
| Vent Masters Air Duct Cleaning | 5.0★ (1) | In San Marcos |
| W HVAC Escondido | 5.0★ (2) | 3 mi |
National price ranges in USD, not adjusted for San Marcos. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| AC replacement | $3,887 | $5,978 | $8,073 | Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range | October 2026 |
| Furnace replacement | $2,823 | $4,814 | $6,896 | Per system, installed; typical range of customer-reported jobs. US national range | October 2026 |
In California, Contractors State License Board (CSLB) licenses C-20 Warm-Air Heating, Ventilating and Air-Conditioning contractor license.
Jobs of $1,000 or more in labor and materials (from January 1, 2025).
No chip usually means we have not matched a state record yet. Check the lookup yourself before you hire.
Guide checked October 2026. How we verify licenses
California's HVAC demand peaks during summer heat waves and the first cold snaps. Spring and fall are the easiest times to book maintenance.
We scored 481 San Marcos HVAC contractors on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed October 22, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In San Marcos data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |