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ContractorsRanked

Best HVAC Contractors in Walnut, CA (2026)

1,432 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Walnut: Service Hero Plumbing, HVAC, and Electrical, CR Score 92/100; 4.8★ from 1,506 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): Home Comfort USA, posts 24/7 hours; ranked #2 of 1,432.

  3. 6

    Most-reviewed: All Pro Cooling, Heating, Plumbing & Electrical, 7,425 Google reviews at 4.8★, the most of 1,432 ranked; ranked #6.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

1,432 Walnut HVAC contractors are ranked here by CR Score, from 8 published factors. 493 are open 24/7, 1,104 open Saturdays and 762 open Sundays, based on posted hours. The median Google rating is 4.9★ across 1,432 rated businesses.

Top 10 HVAC contractors in Walnut at a glance

Top 10 HVAC contractors in Walnut at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Service Hero Plumbing, HVAC, and Electrical924.8★ (1,506)Covina, 6 mi away24/7Overall
2Home Comfort USA914.8★ (2,813)Anaheim, 11 mi away24/7Emergencies
3Metz Air Control914.9★ (969)Chino, 10 mi away24/7—
4Steve's Five Star Service914.9★ (1,292)Upland, 12 mi away24/7—
5AARD Mechanical Air Conditioning & Heating914.9★ (547)Brea, 7 mi away24/7—
6All Pro Cooling, Heating, Plumbing & Electrical914.8★ (7,425)Ontario, 19 mi away24/7Most reviews
7Veteran Air904.9★ (1,091)Anaheim, 12 mi away24/7—
8Air Concepts Air Conditioning and Heating904.9★ (995)Anaheim, 11 mi away24/7—
9Klaus & Sons Plumbing, Heating & Air Conditioning904.9★ (977)Montclair, 12 mi away24/7—
10Titan Air Conditioning904.9★ (439)Brea, 7 mi away24/7—

The 1,432 best HVAC contractors in Walnut, ranked

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.

  2. #2 Home Comfort USA

    Based in Anaheim, 11 mi away

    91/100CR Score

    Ranked #2 because of its Google rating and availability: 4.8★ from 2,813 Google reviews, open 24/7.

    • 4.8★ from 2,813 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1120 N Tustin Ave, Anaheim, CA 92807
    View profile for Home Comfort USA(714) 467-2932

  3. #3 Metz Air Control

    Based in Chino, 10 mi away

    91/100CR Score

    Ranked #3 because of its Google rating and availability: 4.9★ from 969 Google reviews, open 24/7.

    • 4.9★ from 969 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    13784 Monte Vista Ave, Chino, CA 91710
    View profile for Metz Air Control(909) 925-0513

  7. #7 Veteran Air

    Based in Anaheim, 12 mi away

    90/100CR Score

    Ranked #7 because of its Google rating and availability: 4.9★ from 1,091 Google reviews, open 24/7.

    • 4.9★ from 1,091 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2925 E Ricker Way, Anaheim, CA 92806
    View profile for Veteran Air(714) 426-9420

  24. #24 Canyon City Air

    Based in San Dimas, 7 mi away

    89/100CR Score

    Ranked #24 because of its Google rating and availability: 5.0★ from 122 Google reviews, open 24/7.

    • 5.0★ from 122 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    515 W Allen Ave STE 2A, San Dimas, CA 91773
    View profile for Canyon City Air(626) 208-6354

HVAC contractors ranked #26 to #50

#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 1,432 ranked HVAC contractors here; the rest are on their profiles.

HVAC contractors in Walnut, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Aire Serv of Pasadena894.9★ (394)13 mi
27Honest Pro Air Conditioning & Heating - HVAC894.9★ (89)3 mi
28Orange Coast Plumbing895.0★ (276)13 mi
29RC Air Heating & Air Conditioning Service894.9★ (705)16 mi
30JW Plumbing, Heating & Air894.8★ (175)5 mi
31Accurate Comfort Air Conditioning And Heating884.9★ (135)7 mi
32Mega Clean Air885.0★ (223)13 mi
33NexGen HVAC & Plumbing884.7★ (538)10 mi
34JW Plumbing, Heating and Air884.8★ (2,541)22 mi
35All Pro Cooling, Heating, Plumbing & Electrical884.7★ (4,107)22 mi
36Service Champions Plumbing, Heating & AC884.9★ (6,978)7 mi
37Avis Plumbing and Air884.7★ (438)11 mi
38Aced It Heating & AC Repair875.0★ (306)19 mi
39ABC Heating & Air Conditioning875.0★ (392)8 mi
40Purified Air Heating and Air Conditioning, Inc875.0★ (251)18 mi
41Plus Air Duct Testing875.0★ (401)22 mi
42Duarte Heating & Air Conditioning875.0★ (64)10 mi
43Eubanks Air Inc875.0★ (17)1 mi
44One Hour Heating & Air Conditioning875.0★ (143)15 mi
45RighTime Home Services874.7★ (3,741)25 mi
46Coast Plumbing, Heating & Air, Inc.874.9★ (596)22 mi
47Fast Call Service875.0★ (38)6 mi
48Wing Air Conditioning Services875.0★ (20)2 mi
49Sol Air Hvac LLC874.9★ (112)12 mi
50Happy Camper Heating, Plumbing, and AC Repair875.0★ (341)9 mi

Also serving Walnut

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.

Unranked HVAC contractors serving Walnut
BusinessGoogle ratingDistance
⚒️ HVAC Contractors Near Me 🛠️ ⭐⭐⭐⭐⭐5.0★ (2)8 mi
ABR Air Conditioning, Heating, and Refrigeration5.0★ (2)3 mi
Accurate Electric, Plumbing, Heating and Air4.9★ (951)8 mi
Air Conditioning ColdPro5.0★ (2)7 mi
Ayman Ibrahim HVAC Contractor5.0★ (84)6 mi
Covenant Air Systems Inc3.0★ (2)7 mi
Hvac Parts & Supplies3.0★ (2)7 mi
Hvac-Air Conditioning Corporation.5.0★ (1)In Walnut
Liberty Air5.0★ (2)5 mi
Living Air Design5.0★ (76)6 mi
Mac Refrigeration & Air Conditioning3.0★ (2)4 mi
Penguin Heating and Air5.0★ (144)11 mi
Power Pro Plumbing Heating & Air4.8★ (231)12 mi
Premier Construction Glendora5.0★ (2)7 mi
Professional Heating & Air3.0★ (2)7 mi
Shine Cooling & Heating5.0★ (2)7 mi
Valley Air Conditioning & Heating5.0★ (2)6 mi
Viking Air Inc.5.0★ (2)6 mi
West Covina Hvac Services5.0★ (2)3 mi
Wilson Duct Repair Service5.0★ (2)7 mi

How much do HVAC contractors cost in Walnut?

National price ranges in USD, not adjusted for Walnut. Each row names its basis and the month we checked it.

How much do HVAC contractors cost in Walnut?
JobLowTypicalHighBasisChecked
AC replacement$3,887$5,978$8,073Per system, installed (unit plus labor); typical range of customer-reported jobs. US national rangeOctober 2026
Furnace replacement$2,823$4,814$6,896Per system, installed; typical range of customer-reported jobs. US national rangeOctober 2026

How to check an HVAC contractor's license in California

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).

  1. Search the business name or license number on the Contractors State License Board (CSLB) license lookup.
  2. Check that the status is active and the name matches the contract or truck.
  3. Ask for proof of insurance before work starts.

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

When to hire an HVAC contractor in California

California's HVAC demand peaks during summer heat waves and the first cold snaps. Spring and fall are the easiest times to book maintenance.

How we ranked Walnut HVAC contractors

We scored 1,432 Walnut 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.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn Walnut data
Reputation35%Bayesian-adjusted Google star ratingMeasured
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2Not yet collected
Review volume10%log10(reviews + 1) against the list maximumMeasured
Recency10%Share of reviews from the last 12 monthsNot yet collected
Availability10%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5Measured
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radiusMeasured
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)Measured

HVAC contractors in Walnut: frequently asked questions

Who is the best HVAC contractor in Walnut?

By CR Score, the highest-ranked HVAC contractor in Walnut, CA is Service Hero Plumbing, HVAC, and Electrical with a CR Score of 92/100. It has 4.8★ from 1,506 Google reviews. It is open 24/7. Home Comfort USA (#2) and Metz Air Control (#3) follow. We ranked 1,432 HVAC contractors on 8 factors, last updated October 22, 2026.

How many HVAC contractors are there in Walnut?

ContractorsRanked ranks 1,432 HVAC contractors serving Walnut, CA. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.

Which HVAC contractors in Walnut are open 24/7?

493 ranked HVAC contractors in Walnut post 24/7 hours. The highest-ranked are Service Hero Plumbing, HVAC, and Electrical (#1), Home Comfort USA (#2) and Metz Air Control (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which HVAC contractors in Walnut work on weekends?

1,104 of 1,432 ranked HVAC contractors post Saturday hours and 762 post Sunday hours. The highest-ranked open Saturdays are Service Hero Plumbing, HVAC, and Electrical (#1), Home Comfort USA (#2) and Metz Air Control (#3). Posted hours are office hours; crews may book weekend jobs separately.

How do I check an HVAC contractor's license in California?

In California, Contractors State License Board (CSLB) handles licensing and covers C-20 Warm-Air Heating, Ventilating and Air-Conditioning contractor license. Search the business or license number at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/CheckLicense.aspx. Jobs of $1,000 or more in labor and materials (from January 1, 2025).

How much does ac replacement cost in Walnut?

AC replacement typically costs $3,887 to $8,073, with $5,978 typical (Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range). This is a national range, not adjusted for Walnut. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do Walnut HVAC contractors have?

The median Google rating among 1,432 rated HVAC contractors in Walnut is 4.9★, with a median of 17 reviews. All Pro Cooling, Heating, Plumbing & Electrical has the most, 7,425 reviews, and ranks #6. We adjust ratings for review count, so a few five-star reviews cannot top the list.

When is the best time to hire an HVAC contractor in Walnut?

California's HVAC demand peaks during summer heat waves and the first cold snaps. Spring and fall are the easiest times to book maintenance.

Update log for Walnut

  1. October 2026: CR Scores recalculated for 1,432 hvac contractors serving Walnut.
  2. October 2026: 7 duplicate listings merged.

More HVAC contractors and Walnut pages

Other trades in Walnut