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A 100% Guarantee Heating & AC LLC.

HVAC Companies in Vacaville, California
Ranked #3 in Vacaville | Grade B+
4.90 (345 reviews)

A 100% Guarantee Heating & AC LLC.

Local HVAC contractor offering repair, replacements, and thermostat installs with an emphasis on clear communication and tidy work. Scheduling available Monday through Saturday Serving homeowners across Vacaville, California.

A 100% Guarantee Heating & AC LLC. business photo 1 - HVAC in Vacaville
A 100% Guarantee Heating & AC LLC. business photo 2 - HVAC in Vacaville
A 100% Guarantee Heating & AC LLC. business photo 3 - HVAC in Vacaville
A 100% Guarantee Heating & AC LLC. business photo 4 - HVAC in Vacaville
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Why Homeowners Choose This Business

Clear scheduling, technicians who explain findings, and careful workmanship noted in many customer comments. Jobs range from quick thermostat swaps to full HVAC replacements, with attention to proper materials and line sets when needed Local experience that helps homeowners across Vacaville, California compare a more region-aware provider.

Service Area

Serving Vacaville, California and nearby communities in Solano County, with limited service into adjacent areas based on availability.

Featured Local Business

This featured listing includes fuller business details and a stronger local presentation for homeowners comparing nearby options.

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Listing details

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  • Verified listing details
  • Service information
  • Customer review signals
  • Photo gallery
  • Public contact information
  • Published local profile

How This Business Compares

A quick local comparison based on review strength, business detail, and local service fit.
  • Maintains a competitive standing in this market.
  • Performs at or above the local average rating.
  • Has more review volume than many local competitors.
  • Shows strong customer satisfaction signals based on review quality and volume.

Services Covered

  Renovation Services
  Hvac Repair
  Maintenance
  Air Conditioner Repair
  Installations
  Furnace Repair
  Repairs
  HVAC replacement
  Thermostat Installation
  Heat Pump Service
  Ductwork inspection
  Seasonal HVAC maintenance
  Light Commercial HVAC
  HVAC Diagnostics
  AC Tune-Up
  Heating System Service

Heating and cooling diagnostics, AC repair, furnace repair, HVAC replacement, thermostat installation, seasonal checkups, and light commercial service.

Reviews

Customer Reviews

Deirdrea Shanahan
Evan and Davin have done a wonderful job updating our system . Friendly and very knowledgeable . Thank you to you both for fixing our unit.
Bobby W
This was my second time using their service. The owner, Jerry, responded to my inquiry very promptly and was able to accommodate my schedule with no hassle. Communication was clear and consistent from start to finish, which I really appreci…
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This was my second time using their service. The owner, Jerry, responded to my inquiry very promptly and was able to accommodate my schedule with no hassle. Communication was clear and consistent from start to finish, which I really appreciate.

AJ, who came out to work on my A/C, was professional, friendly, and did a thorough job. He took the time to answer all my questions in detail. I think he spent more time making sure I understood everything than working on the unit, which speaks volumes about their dedication to customer satisfaction.
Highly recommended! I will be using their services again in the future.
carol jane
Thank you Evan for all your hard work and dedication to completing this project. I'm very happy with my new HVAC, the heater works great. When I was shopping around for contractors to help me with a new HVAC, Evan with A100% was the only on…
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Thank you Evan for all your hard work and dedication to completing this project. I'm very happy with my new HVAC, the heater works great. When I was shopping around for contractors to help me with a new HVAC, Evan with A100% was the only one that would replace the recommended copper pipping that connects to the furnace/condenser. The other contractors are just going to flush the pipes and use the old smaller existing pipes that might not be suitable for the new HVAC system. They also did a great job in updating my old ducts, I have very little air loss. And many thanks to Catriena for helping me with the financing and the application for the inflation reduction act rebates. I would not have been able to do this without that. I completely recommend A100%, they don't just do the job, they do it right!
Madeline Boulding
These people are absolutely amazing. I spoke to Katrina and Ryan was the one that actually did the work. Both super friendly and very professional. Ryan arrived on time and completed the work in a timely manner... I am very pleased with my…
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These people are absolutely amazing. I spoke to Katrina and Ryan was the one that actually did the work. Both super friendly and very professional. Ryan arrived on time and completed the work in a timely manner... I am very pleased with my thermostat install. I definitely recommend this company.
Donald Prolo
I hired A 100% guarantee heating and AC to remove 3 air handling units on my commercial warehouse so that the roof could be repaired and the units be reinstalled. When I first met with Evan, the owner, he seemed knowledgeable, but he creat…
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I hired A 100% guarantee heating and AC to remove 3 air handling units on my commercial warehouse so that the roof could be repaired and the units be reinstalled. When I first met with Evan, the owner, he seemed knowledgeable, but he created a complete nightmare for a simple task on my property and eventually caused over $20,000 of damage to my building and its contents. I have reached out to him for the last month and he will not even bother to talk to me. The first cause of major damage occurred when he ordered and improperly installed the wrong curbs for the units creating a 6 week period where I had 3 large holes in my roof where the air handlers were removed from. He removed his original improperly installed curbs (see photos) and during that time period he assured me if it rained that he had covered the openings and no water could get in. When it did rain his covering failed and ruined an $11,000 printer in the office space down below along with damaging the building. Finally when the new curbs came in and everything was installed he had done so much damage (punctures/tears see photos) to the brand new roof surrounding the areas that he was working that I had to spend $9,000 replacing the brand new section of roof. I also had to hire another company to properly install the duct work because there were large holes left for the air to escape into the non conditioned space. It’s clear Evan does not care about the destruction he left behind.

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Frequently Asked Questions

Common requests include AC and furnace diagnostics, repair of failed components, full system replacements, and thermostat installations. Light commercial work is also performed depending on project scope and scheduling.

Scheduling is typically available Monday through Saturday during stated business hours. Call the office to confirm the next opening and to discuss urgency if your system is down.

Yes, technicians explain findings and outline options before proceeding. You can ask for written estimates for replacements or larger repairs once diagnostics are complete.

When appropriate, line set replacement can be discussed as part of a full system upgrade. Technicians will evaluate existing lines and advise on suitability versus replacement.

Technicians service most major residential HVAC brands for repair and maintenance. For replacements, available equipment options can be reviewed during an on-site visit.
 Verified Listing

Opening Hours

  • Monday 8:00 AM – 8:00 PM
  • Tuesday 8:00 AM – 8:00 PM
  • Wednesday 8:00 AM – 8:00 PM
  • Thursday 8:00 AM – 8:00 PM
  • Friday 8:00 AM – 8:00 PM
  • Saturday 8:00 AM – 8:00 PM
  • Sunday Closed

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Business Details

Business Rating
4.90 (345 reviews) Featured BusinessPro Listing
Address
3305 Aldridge Rd, Vacaville, CA 95688
Business Type
HVAC Contractor
Website
http://www.a100guarantee.com/
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