317 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Carlsbad: Sherlock Plumbing, Heating & Air, CR Score 96/100; 4.9★ from 4,132 Google reviews; open 24/7.
Best for emergencies (open 24/7): John Stevenson Plumbing, Heating & Air Conditioning, posts 24/7 hours; ranked #2 of 317.
Most-reviewed: Action Air Conditioning & Heating, 3,896 Google reviews at 4.9★, the most of 317 ranked after Sherlock Plumbing, Heating & Air; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
317 Carlsbad HVAC contractors are ranked here by CR Score, from 8 published factors. 92 are open 24/7, 228 open Saturdays and 167 open Sundays, based on posted hours. The median Google rating is 5.0★ across 317 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Sherlock Plumbing, Heating & Air | 96 | 4.9★ (4,132) | Carlsbad | 24/7 | Overall |
| 2 | John Stevenson Plumbing, Heating & Air Conditioning | 95 | 4.8★ (2,898) | Carlsbad | 24/7 | Emergencies |
| 3 | Action Air Conditioning & Heating | 94 | 4.9★ (3,896) | San Marcos, 9 mi away | 24/7 | Most reviews |
| 4 | Personal Plumbing Heating & Air Conditioning | 94 | 4.9★ (1,305) | Oceanside, 4 mi away | 24/7 | — |
| 5 | Veterans Heating and Air Conditioning, Plumbing, and Electrical | 93 | 5.0★ (601) | Oceanside, 5 mi away | 24/7 | — |
| 6 | Anderson Plumbing, Heating & Air | 93 | 4.8★ (2,810) | San Marcos, 9 mi away | 24/7 | — |
| 7 | Airtime Heating and Air | 92 | 5.0★ (426) | Oceanside, 6 mi away | 24/7 | — |
| 8 | Cool Air Solutions Heating and Air Conditioning Inc. | 91 | 4.9★ (338) | Vista, 6 mi away | 24/7 | — |
| 9 | Mauzy Cooling, Heating, Plumbing, and Electrical | 90 | 4.8★ (1,303) | Escondido, 13 mi away | 24/7 | — |
| 10 | Triton Air | 90 | 4.9★ (3,766) | San Clemente, 25 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 because of its Google rating and review volume: 4.9★ from 4,132 Google reviews, the most Google reviews on this list (4,132).
Based in Carlsbad
Ranked #2 because of its Google rating and availability: 4.8★ from 2,898 Google reviews, open 24/7.
Based in San Marcos, 9 mi away
Ranked #3 because of its Google rating and availability: 4.9★ from 3,896 Google reviews, open 24/7.
Based in Oceanside, 4 mi away
Ranked #4 because of its Google rating and availability: 4.9★ from 1,305 Google reviews, open 24/7.
Based in Oceanside, 5 mi away
Ranked #5 because of its Google rating and availability: 5.0★ from 601 Google reviews, open 24/7.
Based in San Marcos, 9 mi away
Ranked #6 because of its Google rating and availability: 4.8★ from 2,810 Google reviews, open 24/7.
Based in Oceanside, 6 mi away
Ranked #7 because of its Google rating and availability: 5.0★ from 426 Google reviews, open 24/7.
Based in Vista, 6 mi away
Ranked #8 because of its Google rating and availability: 4.9★ from 338 Google reviews, open 24/7.
Based in Escondido, 13 mi away
Ranked #9 because of its Google rating and availability: 4.8★ from 1,303 Google reviews, open 24/7.
Based in San Clemente, 25 mi away
Ranked #10 because of its Google rating and availability: 4.9★ from 3,766 Google reviews, open 24/7.
Based in Oceanside, 6 mi away
Ranked #11 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 #12 because of its Google rating and availability: 4.9★ from 1,612 Google reviews, open 24/7.
Based in Vista, 7 mi away
Ranked #13 because of its Google rating and availability: 4.7★ from 402 Google reviews, open 24/7.
Based in Oceanside, 5 mi away
Ranked #14 because of its Google rating and availability: 4.7★ from 237 Google reviews, open 24/7.
Based in Escondido, 14 mi away
Ranked #15 because of its Google rating and availability: 4.9★ from 360 Google reviews, open 24/7.
Based in Carlsbad
Ranked #16 because of its Google rating and availability: 5.0★ from 25 Google reviews, open 24/7.
Based in Oceanside, 4 mi away
Ranked #17 because of its Google rating and availability: 4.7★ from 127 Google reviews, open 24/7.
Based in Escondido, 13 mi away
Ranked #18 because of its Google rating and availability: 4.9★ from 222 Google reviews, open 24/7.
Based in San Diego, 22 mi away
Ranked #19 because of its Google rating and availability: 4.9★ from 815 Google reviews, open 24/7.
Based in Carlsbad
Ranked #20 because of its Google rating and availability: 4.6★ from 151 Google reviews, open 24/7.
Based in San Marcos, 9 mi away
Ranked #21 because of its Google rating and trade focus: 4.8★ from 1,139 Google reviews, listed on Google as “HVAC contractor”.
Based in Camp Pendleton North, 11 mi away
Ranked #22 because of its Google rating and availability: 4.9★ from 102 Google reviews, open 24/7.
Based in Fallbrook, 16 mi away
Ranked #23 because of its Google rating and availability: 5.0★ from 123 Google reviews, open 24/7.
Based in San Diego, 21 mi away
Ranked #24 because of its Google rating and availability: 4.9★ from 384 Google reviews, open 24/7.
Based in Vista, 7 mi away
Ranked #25 because of its Google rating and availability: 5.0★ from 30 Google reviews, open 24/7.
#1 to #25 are shown in full above. Here are #27 to #28, in CR Score order; each links to its profile. We publish the top 28 of 317 ranked HVAC contractors here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 27 | Home Run Heating and Air | 86 | 5.0★ (32) | 9 mi |
| 28 | ProFlo Air Conditioning, Heating & Plumbing | 86 | 4.9★ (113) | 15 mi |
National price ranges in USD, not adjusted for Carlsbad. 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 317 Carlsbad HVAC contractors on 8 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. Unknown factors are left out of the score, 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 Carlsbad data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |