Christopher Brouns
Henry was amazing. He handled everything professionally And didn’t stop until we got the results we needed. Thank you, Henry for your amazing work. You deserve a raise. Great serviceman quality work highly recommend him.
FeaturedTaking CallsVerifiedHVAC Companies in Stockton, California
Delta Sierra Mechanical
Delta Sierra Mechanical is a family-owned heating and cooling business in Stockton. It repairs and installs air conditioners and furnaces, and provides duct cleaning. Its installation options include split systems and ducted or ductless mini-splits.
Business Highlights
- The company lists California C-20 license 1085319.
- It says its furnace repair technicians are licensed and insured.
Service Area
Based in Stockton and serving Lodi, Manteca, Tracy, French Camp, Garden Acres and Country Club.
Featured on ProsGrade. Delta Sierra Mechanical is one of 10 HVAC companies ProsGrade lists in Stockton, California.
Listing details
6 services listed, including Air conditioning repair, Air conditioning installation and Furnace repair. Open 24 hours, 7 days a week. Rated 4.9 from 1,215 reviews.
- Verified listing details
- Service information
- Customer review signals
- Photo gallery
- Public contact information
- Published local profile
How This Business Compares
How Delta Sierra Mechanical compares with the other 9 HVAC companies on ProsGrade in Stockton, using public Google ratings and review counts.
- Ranks in the top 10% of Stockton HVAC companies on ProsGrade by Google rating and review volume.
- Rated 4.9 on Google, at or above the 4.8 average of other Stockton HVAC companies on ProsGrade.
- Has the most Google reviews (1,215) of the 10 Stockton HVAC companies on ProsGrade.
- One of 8 Stockton HVAC companies on ProsGrade rated 4.7 or higher from at least 10 reviews.
Trust Signals
Open 24 hours for scheduling; call to confirm current availability for urgent HVAC needs.
Services Covered
6 services- Air conditioning repairTechnicians repair central air units and ductless mini-splits after inspecting and diagnosing the problem.
- Air conditioning installationInstallation options include gas package units, split systems, and ducted or ductless mini-splits.
- Furnace repairThe team diagnoses airflow, ignition and control issues, short cycling and inadequate heat.
- Furnace installationNew furnace installations include custom sizing for the home.
- Duct cleaningThe service includes duct inspection, cleaning dust and debris, vent cleaning, and a performance check.
- HVAC maintenanceThe maintenance membership includes two seasonal system tune-ups and filter replacements.
Reviews
What customers say
Customers praise the technicians for professionalism and clear explanations. One customer says Chris returned for HVAC service after replacing a capacitor the previous year; another says Henry replaced a thermostat and restored app control, while Adrian later diagnosed a separate heater problem. A customer with a new system appreciated the neat installation and a passed final city inspection.
Customer Reviews
alex Igbenabor
I had another great experience with Chris Buethe from Delta Sierra Mechanical! This is the second time Chris has serviced my HVAC system. Last year, he came out to replace a capacitor, and this year he provided excellent service again.
Chris is always polite, friendly, and professional. He takes the time to explain what’s going on with my HVAC system and educates me about how everything works. I truly appreciate that he doesn’t just fix the issue, he provides solutions and makes sure I understand how to prevent future problems.
It’s reassuring to work with someone so knowledgeable and trustworthy. I highly recommend Chris and Delta Sierra Mechanical for HVAC service!
Steve Sale
The service tech Henry, replaced my thermostat and reset the system so I could resume controlling my system via the app. He also suggested purchasing the HVAC twice yearly maintenance plan which was money well spent. This was my first time having my system serviced by Delta Sierra Mechanical, and I am EXTREMELY pleased and would HIGHLY recommend them.
1/26/26
I just found out I never posted the above comments regarding Henry. His work was performed in 2025.
Today 1/26/26, I had to call Delta Sierra again for a different problem. Thank goodness Delta Sierra is an authorized company that AHS works with. My heater was not turning on and Delta Sierra sent out their tech Adrian. Adrian was FANTASTIC, and because of the POSITIVE, Professionslism from Adrian, I wasn’t surprised. Adrian found the problem and upon futther review, Adrian was very proactive in addressing another potential problem that could cause further damage. I even went so far to call Delta Sierra and asked Janet to relay my EXTREMELY Satisfied feelings to the office manager or the owner of the company. I am a VERY SATISFIED customer of Delta Sierra and would hope they would answer the next call if I needed service.
Delta Sierra trains their techs the right way AND it shows.
Steve Sale 1/26/26
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Frequently Asked Questions
Is emergency furnace repair available?
The company offers 24/7 emergency residential furnace repair.
What does the maintenance membership include?
The listed plans include two seasonal tune-ups and filter replacements.
Are financing options available?
The company offers financing plans for HVAC work.