Best HVAC Repairs in Diamond Bar, CA (2026)

17 verified businesses · Sorted by rating & reviews

Also in Diamond Bar

Air Duct CleaningHVAC InstallationMini Split / Ductless AC Installation
1

Home Comfort USA

Google★★★★½4.82.9k reviews
→ Stable·3 mo: 4.8★ (45)·6 mo: 4.7★ (146)
Staff:+Tanner (2)
1120 N Tustin Ave, Anaheim, CA 92807
+1714-467-2932
HVAC contractor
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Home Comfort USA photo 1
2

Veteran Air

Google★★★★½4.91.1k reviews
Yelp4.5 stars4.7477 reviews
→ Stable·3 mo: 5★ (12)·6 mo: 5★ (12)
Staff:+Michael (2)
2925 E Ricker Way, Anaheim, CA 92806
+1714-426-9420
HVAC contractor
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Veteran Air photo 1
3

Dial One Sonshine Heating, Air & Plumbing

Google★★★★½4.92.9k reviews
Yelp3 stars3.2218 reviews
→ Stable·3 mo: 4.9★ (32)·6 mo: 4.8★ (121)
3655 W McFadden Ave, Santa Ana, CA 92704
+1714-613-1016
HVAC contractor
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Dial One Sonshine Heating, Air & Plumbing photo 1Dial One Sonshine Heating, Air & Plumbing photo 2
4

Alps Heating & Air Conditioning, Inc.

Google★★★★½4.91.0k reviews
Yelp4.5 stars4.6402 reviews
→ Stable·3 mo: 4.9★ (12)·6 mo: 4.9★ (50)
Staff:Alfredo (2)kenia (2)+Kiki (2)
1895 S Santa Cruz St, Anaheim, CA 92805
+1714-633-8892
HVAC contractor
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5

Evolution Heating and Air Conditioning

Google★★★★½4.9352 reviews
Yelp5 stars4.9281 reviews
→ Stable·3 mo: 5★ (8)·6 mo: 4.8★ (41)
Staff:+Eddy (2)+Angel (2)
699 S State College Blvd Suite K, Fullerton, CA 92831
+1657-837-6010
HVAC contractor
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6

Next Level Heating and Cooling

Google★★★★½4.9282 reviews
Yelp5 stars4.9225 reviews
→ Stable·3 mo: 5★ (4)·6 mo: 4.3★ (6)
Staff:+Jose (2)+MAX (2)
2821 E White Star Ave # E, Anaheim, CA 92806
+1714-970-4329
HVAC contractor
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Next Level Heating and Cooling photo 1
7

MSP HEATING AND AIR CONDITIONING

Google★★★★★51.2k reviews
Yelp5 stars4.8293 reviews
Staff:+Jayce (2)
2932 Rubidoux Blvd Suite B, Jurupa Valley, CA 92509
+1951-621-0919
HVAC contractor
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8

Ace Home Heating & Air Conditioning

Google★★★★½4.71.2k reviews
Yelp3.5 stars3.3116 reviews
↓ Declining·3 mo: 4.3★ (6)·6 mo: 4.5★ (25)
Staff:+Mike (2)+Andrew (2)
5324 Mission Blvd #3, Riverside, CA 92509
+1951-772-3741
HVAC contractor
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Ace Home Heating & Air Conditioning photo 1Ace Home Heating & Air Conditioning photo 2Ace Home Heating & Air Conditioning photo 3Ace Home Heating & Air Conditioning photo 4Ace Home Heating & Air Conditioning photo 5Ace Home Heating & Air Conditioning photo 6Ace Home Heating & Air Conditioning photo 7Ace Home Heating & Air Conditioning photo 8
9

Absolute Airflow Air Conditioning, Heating and Plumbing

Google★★★★½4.8570 reviews
Yelp4.5 stars4.3143 reviews
↓ Declining·3 mo: 4.5★ (2)·6 mo: 4.7★ (3)
6611 Arlington Ave, Riverside, CA 92504
+1951-425-4384
HVAC contractor
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Absolute Airflow Air Conditioning, Heating and Plumbing photo 1Absolute Airflow Air Conditioning, Heating and Plumbing photo 2Absolute Airflow Air Conditioning, Heating and Plumbing photo 3Absolute Airflow Air Conditioning, Heating and Plumbing photo 4Absolute Airflow Air Conditioning, Heating and Plumbing photo 5Absolute Airflow Air Conditioning, Heating and Plumbing photo 6Absolute Airflow Air Conditioning, Heating and Plumbing photo 7Absolute Airflow Air Conditioning, Heating and Plumbing photo 8Absolute Airflow Air Conditioning, Heating and Plumbing photo 9Absolute Airflow Air Conditioning, Heating and Plumbing photo 10Absolute Airflow Air Conditioning, Heating and Plumbing photo 11Absolute Airflow Air Conditioning, Heating and Plumbing photo 12Absolute Airflow Air Conditioning, Heating and Plumbing photo 13Absolute Airflow Air Conditioning, Heating and Plumbing photo 14
10

South County Air Services

Google★★★★★5202 reviews
Yelp5 stars5180 reviews
↓ Declining·3 mo: 4.8★ (16)·6 mo: 4.9★ (32)
2630 Walnut Ave Suite G, Tustin, CA 92780
+1949-933-3130
HVAC contractor
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11

Power Pro Plumbing Heating & Air

Google★★★★½4.8231 reviews
Staff:+Luis (2)
1231 N Patt St, Anaheim, CA 92801
+1714-426-9102
HVAC contractor
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Power Pro Plumbing Heating & Air photo 1
12

Southwest Heating & Air Conditioning

Google★★★★½4.9339 reviews
Yelp4.5 stars4.5544 reviews
→ Stable·3 mo: 5★ (7)·6 mo: 5★ (30)
Staff:+Bobby (2)owner (2)
622 Alpine St, Los Angeles, CA 90012
+1310-867-0703
HVAC contractor
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13

Greenstar Home Services / RighTime Home Services

Google★★★★½4.6968 reviews
Yelp2.5 stars2.6333 reviews
↓ Declining·3 mo: 1.5★ (2)·6 mo: 3.7★ (30)
1821 McGaw Ave, Irvine, CA 92614
+1714-361-2917
HVAC contractor
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14

Los Angeles Heating and Air Conditioning

Google★★☆☆☆2.19 reviews
Yelp5 stars4.9533 reviews
114 San Pedro St, Los Angeles, CA 90012
+1213-695-3895
HVAC contractor
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15

One Hour Heating & Air Conditioning

Google★★★★★5152 reviews
Yelp5 stars55 reviews
→ Stable·3 mo: 5★ (19)·6 mo: 5★ (77)
Staff:+Kalani Jr (2)
1350 W Collins Ave Suite M, Orange, CA 92867
+1714-922-5552
HVAC contractor
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One Hour Heating & Air Conditioning photo 1One Hour Heating & Air Conditioning photo 2One Hour Heating & Air Conditioning photo 3One Hour Heating & Air Conditioning photo 4One Hour Heating & Air Conditioning photo 5
16

Pristine Air Conditioning, Heating & Plumbing

Google★★★★★5298 reviews
Yelp4.5 stars4.321 reviews
→ Stable·3 mo: 4.9★ (11)·6 mo: 4.8★ (42)
555 Anton Blvd suit 150, Costa Mesa, CA 92626
+1949-243-7979
HVAC contractor
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Pristine Air Conditioning, Heating & Plumbing photo 1Pristine Air Conditioning, Heating & Plumbing photo 2
17

Service All-Stars Plumbing Heating and Air

Google★★★★½4.8181 reviews
↑ Improving·3 mo: 5★ (8)·6 mo: 5★ (17)
1440-2 S State College Blvd suite B, Anaheim, CA 92806
+1714-621-5003
HVAC contractor
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