Pros411

HVAC contractors in Monrovia, CA

AC & heating

104 results

Sorted from nearest to farthest.

Registered and featured HVAC contractors

Other local businesses

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HVAC contractors in Monrovia, CA: by the numbers

There are 104 HVAC contractors with a phone number within 10 miles of Monrovia, CA, from public Google Maps data and state license records. 0 have a state license we could confirm, and those with a Google listing average 4.8 stars across 9,446 reviews.

with a phone number
104
with a confirmed state license
0
open 24 hours or for emergencies
52
come to you (service area)
4

Highest rated on Google near Monrovia, CA

Businesses with at least 20 Google reviews, sorted by rating. Ratings come from Google, not from Pros411.

  1. 1Comfort Zone, Inc.5 ★ · 273 reviews · 7.1 mi
  2. 2Comfort Climate Control5 ★ · 161 reviews · 4.6 mi
  3. 3Diamond Air Services5 ★ · 118 reviews · 4.3 mi
  4. 4Jet Air Solutions5 ★ · 116 reviews · 8.3 mi
  5. 5The Air Conditioning Guy5 ★ · 100 reviews · 4.6 mi

Hours

Of the 93 businesses in this search that list their hours on Google, 75 are open on Saturdays and 67 on Sundays. 52 are open 24 hours. 33 have 4.5 stars or more with at least 10 reviews.

Good to know in Inland Empire

Riverside and San Bernardino have hot summers, often above 100°F, Santa Ana winds and a long wildfire season, so air conditioning and roofing are year-round businesses here.

Clean the outdoor unit of dust and leaves before summer: in the Inland Empire heat a dirty coil makes the system run longer and fail sooner.

Weather and your home in Inland Empire (area)

days a year at 90°F or more
110
days a year at 100°F or more
28
freezing nights a year (32°F or below)
2
hail reports in Riverside County, 2016 to 2025 (3 of 1 inch or larger)
7
  • The hottest months are July and August. ncei.noaa.gov
  • Since January 1, 2023, a new central AC installed here must meet the Southwest regional standard: at least 14.3 SEER2 plus a minimum EER2, which measures efficiency in peak heat (for split systems under 45,000 BTU: 11.7, or 9.8 if the unit is 15.2 SEER2 or higher). eere.energy.gov

Heat and freezes: NOAA 1991-2020 climate normals at Riverside (Fire Station 3) (USC00047470). Hail: NOAA Storm Events reports by county; they depend on how many people report, so use them to compare areas. Checked October 22, 2026. NOAA Storm Events

What an HVAC contractor charges

National ranges published by cost guides, not prices from the businesses on this list. Always get the price in writing.

  • Most AC repairs: about $150 to $700 (HomeGuide, HomeAdvisor, Fixr).
  • Service call or diagnostic: $75 to $200.
  • Capacitor: about $100 to $475; compressor: about $600 to $3,000, by source.
  • New central AC, installed: about $3,900 to $13,500 (HomeAdvisor, HomeGuide, Fixr, Trane).

AC repair cost: common repairs and when to replace · New AC unit cost: central air and mini-splits

Before you call

  • Check the thermostat, the breakers and the air filter first.
  • Have the brand and age of your system (on the label of the outdoor unit).
  • Ask about the diagnostic fee and after-hours rates.
  • If refrigerant is low, ask them to find and fix the leak, not just recharge.
  • Ask for the contractor’s license number.

Frequently asked questions

How many HVAC contractors are there in Monrovia, CA?

There are 104 with a phone number within 10 miles, from public Google Maps data and state license registries.

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

In California the license is issued by the Contractors State License Board (CSLB); you can look up the number at https://www.cslb.ca.gov. Pros411 shows "License verified" when the number is in that registry and matches the business phone. 0 of the HVAC contractors on this list have it confirmed.

Which HVAC contractors in Monrovia, CA have the best Google ratings?

Among those with at least 20 Google reviews, the highest rated in this search are Comfort Zone, Inc. (5 stars, 273 reviews), Comfort Climate Control (5 stars, 161 reviews), Diamond Air Services (5 stars, 118 reviews).

Are there HVAC contractors open on weekends in Monrovia, CA?

Yes: of the 93 that list their hours, 75 are open on Saturdays and 67 on Sundays.

Are there 24-hour HVAC contractors in Monrovia, CA?

Yes: 52 list 24-hour hours or take emergency calls. Use the "24/7 emergencies" filter on the list.

Are there HVAC contractors who speak Spanish in Monrovia, CA?

Yes: 1 says on their website that they serve customers in Spanish (for example "Se habla español"). Use the "Speaks Spanish" filter on the list.

How do I contact an HVAC contractor?

Call or WhatsApp them directly from the list or their listing. Pros411 charges customers no fee and is not a middleman: you deal with the pro directly.

Why do some listings show first?

At the top, in a yellow box, are featured listings: they are paid and labeled "Featured". Then come registered pros, in the order they last bumped their listing, and at the end businesses from public data, from nearest to farthest.