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McMaster MechanicalHVAC contractor in Diamond Bar, CA

McMaster Mechanical is an HVAC contractor at 20903 Ambushers St, Diamond Bar, CA 91765, rated 5.0 from 71 Google reviews. Open Monday to Saturday.

Diamond Bar, CA0 paid placements in any rankingHow we rank

Call (714) 497-0225Website ↗

Key facts

Key facts about McMaster Mechanical
Address20903 Ambushers St, Diamond Bar, CA 91765Get directions
Phone(714) 497-0225
Websitefacebook.com
HoursMonday to Saturday: 7 AM – 5 PM
Google rating5.0 from 71 Google reviews

Trades

Each trade shows the evidence we matched it on.

  • HVACmain tradeGoogle main category

Service area

Serves Diamond Bar and 11 towns within 25 miles: Rowland Heights, Walnut, Brea, South San Jose Hills, Chino Hills, Yorba Linda, La Habra Heights, La Habra, Placentia, La Puente and Hacienda Heights.

Based in Diamond Bar, CAView on map

Opening hours

Opening hours for McMaster Mechanical
DayHours
Monday7 AM – 5 PM
Tuesday7 AM – 5 PM
Wednesday7 AM – 5 PM
Thursday7 AM – 5 PM
Friday7 AM – 5 PM
Saturday7 AM – 5 PM
SundayClosed
  • Open evenings — no
  • Open Saturdays
  • Open Sundays — no

Typical heating and cooling prices

Typical heating and cooling prices
JobLowTypicalHigh
AC replacementPer system, installed (unit plus labor); typical range of customer-reported jobs. US national range$3,887$5,978$8,073
Furnace replacementPer system, installed; typical range of customer-reported jobs. US national range$2,823$4,814$6,896

Market ranges for the trade, checked October 2026, not a quote from this business. Ask for a written estimate.

Reviews

ContractorsRanked reviews

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Google

5.0from 71 Google reviews

Hired McMaster Mechanical? Write a review

Questions about McMaster Mechanical

What are McMaster Mechanical’s hours?

McMaster Mechanical is open Monday to Saturday. Its listed hours are Monday to Saturday, 7 AM – 5 PM. On Saturdays it is open 7 AM to 5 PM and closed on Sundays. Hours come from the business listing; holiday hours may differ.

What areas does McMaster Mechanical serve?

Serves Diamond Bar and 11 towns within 25 miles: Rowland Heights, Walnut, Brea, South San Jose Hills, Chino Hills, Yorba Linda, La Habra Heights, La Habra, Placentia, La Puente and Hacienda Heights. The list is based on the business's location and the usual service radius for heating and cooling. Confirm your address is covered when you call.

What do Google reviews say about McMaster Mechanical?

McMaster Mechanical has a rating of 5.0 from 71 Google reviews. The CR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.

How do I contact McMaster Mechanical?

Call McMaster Mechanical on (714) 497-0225. The business is at 20903 Ambushers St, Diamond Bar, CA 91765. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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