
Vallejo is a waterfront city in Solano County, located in the North Bay subregion of the Bay Area. It is geographically close to East Bay and sometimes associated with that area. Vallejo has a mild, coastal Mediterranean climate and can be an average of 10 °F (6 °C) cooler than nearby inland cities. Vallejo is influenced by its position on the northeastern shore of San Pablo Bay, but is less sheltered from heatwaves than areas directly on or nearer the Pacific Ocean/Golden Gate such as San Francisco and Oakland. The hot summer months usually run July through September.
AC problems in Vallejo, CA and Contra Costa area seem to spring up at the worst possible time, creating a degree of urgency for them to be fixed. Luckily, your local Certified technician is more likely than not to diagnose and fix your problem on the first visit. We keep a large percentage of parts stocked at our warehouse, helping to ensure quality and fast turnaround time. We live up to our name, by offering a 24-Hour Fix-It Guarantee!
Is your AC unit blowing warm air? The most common causes are typically:
- An overdamping compressor
- Capacitor failure
- Low refrigerant
These can be interrelated issues. For example, a unit running on low refrigerant can put more issues on the compressor. Certified Heating and Air Conditioning has more than 20 years of experience in diagnosing and treating common AC problems.
Furnace problems in the East and North Bay area seem to spring up at the worst possible time, creating a degree of urgency for them to be fixed. Luckily, your local Certified technician is more likely than not to diagnose and fix your problem on the first visit. We keep a large percentage of parts stocked at our warehouse, helping to ensure quality and fast turnaround time. We live up to our name, by offering a 24-Hour Fix-It Guarantee!
Is your unit feeling colder than normal? There are many causes:
- An airflow issue
- Old/leaky ductwork
- Rodent issues
- Design problems
- Dirty air filters
Vallejo, CA Heating and Air Conditioning Services
Check out what our customers are saying about Certified Heating and Air Conditioning – Air Conditioning and Heating Services!
Local Reviews
for Vallejo, CA
Excellent Service!!!
Jaron - Vallejo, CA 94591
Diego and Eric were great! They provided us with useful information and suggestions to keep our furnace working properly.
VallejoCA94591 38.16-122.1875 Response from Certified Heating and Air Conditioning:
Hi Jaron, We are happy that our valued teammates Eric & Mateo were able to provide you with great service during your annual furnace maintenance tune-up. We love hearing great feedback! - Certified Customer Care Team




Excellent Service
Jasmine - Vallejo, CA 94591
Mayeo was a great technician. He was very thorough and professional. He also helped me with technical problems with my phone app in order to use instead of thermostat
VallejoCA94591 38.1025-122.195 Response from Certified Heating and Air Conditioning:
Hello Jasmine, Thank you for sharing with us! Mateo is a valued teammate of ours. Glad we were able to help! -Certified Customer Care Team




Awesome service
Damien - Vallejo, CA 94590
Mateo Lavin From Certified solar heating!! Was above and beyond friendly fast and explained everything!! He wanted to double check his own work!!! My furnace is up and running! I will deal with this company for all my future needs as I’m sold on Certified!!!
VallejoCA94590 38.0775-122.2325 Response from Certified Heating and Air Conditioning:
Hi Damien, We strive to hire and train great employees like Mateo himself. We are happy you are pleased with our furnace diagnostic service and now have a comfortable heated home. We look forward to servicing you in the future. -Certified Customer Care Team




Professional, Knowledgeable, and Efficient!
Justin - Vallejo, CA 94590
Chris, Nicholas, and Wyatt were extremely professional, knowledgeable, and efficient. They installed a heat pump for our HVAC needs. Completed in one day, I couldn't believe how fast it was. Luis who gave me the bid and quarterbacked the install was my point of contact for the whole process and made this whole process run smoothly. Overall my wife and I will be calling Certified Solar, Heating & Air Conditioning again for any future projects.
VallejoCA94590 38.12-122.2675 Response from Certified Heating and Air Conditioning:
Hi Justin, Thank you for the 5-star review! We love that you are happy with our install team, the installation of your new heat pump system, and our advisor Luis! Welcome to our Certified family. - Certified Customer Care Team




Very Patient and Helpful
Brittany - Vallejo, CA 94591
Super kind technicians tolerated my nosy and noisy puppies.
VallejoCA94591 38.1575-122.18



Maintenance
Carol - Vallejo, CA 94591
Great service
VallejoCA94591 38.095-122.21



Good service
Julie - Vallejo, CA 94590




Great service
Daryl - Vallejo, CA 94589
Jackie was a total professional
VallejoCA94589 38.155-122.24



Great Service, Attitude and Work!
Tom - Vallejo, CA 94591
Let me say professional, polite, clean, no rush, exceptionally competent, scheduling to meet your needs and ready to answer any questions as well as taking the time to explain things if your so inclined to want to learn more about your HVAC system. Those are some of the thoughts that come to mind when thinking about my experience with Certified Heating and Air Conditioning. It started in the office with Kim's very pleasant and service oriented personality in setting up and scheduling my job and ended in the field with Brittany and Jill, who's experience and work ethic resulted in a job well done. I would definitely recommend this company to all. Keep up the good work and God bless America.
VallejoCA94591 38.13-122.2125



Great service
Terry - Vallejo, CA 94591
Great service
VallejoCA94591 38.1125-122.1975



Lee J.
Today certified solar was in the Vallejo area performing a king valve change out under warranty. We braised in new valve, tested with nitrogen and ensured that pressures reached manufacturing specifications. With the issues being fixed, the clients will now be ready for this hot summer that’s due to us.


Jeremiah S.
In the Vallejo California area performing a furnace diagnostic! This 11 these old York furnace would not start! After inspecting, we detected that water was leaking right on to the flame sensor! 😮 if the flame sensor can’t sense flame, then we have no fire! After cleaning and making the necessary repairs, this unit is running properly! I am in the Heather ridge neighborhood a lot! Let us know if we can assist!



Brittany B.
Diagnosing a zoning issue at a home on Mare Island near Vallejo, CA. We replaced some dampers at this home a few months ago and one of them isn’t working correctly. After inspecting the system noticed that the set screw was not tightened and was allowing the shaft to spin further than it was supposed to which caused the damper to open so much that it closed. Got it all fixed up and now the zoning is working fantastically! Thank you for choosing Certified Heating & Air Conditioning!

Galen S.
On Mare island in Vallejo, California to look at upgrading a furnace with a heat pump system.
If you are searching for reliable heating and AC technicians in Vallejo, give Certified Heating and Air Conditioning a try. We have established a solid customer foundation in Contra Costa county over the past four years because of our dedication to the customer backed by numerous guarantees. We are home of the FREE second opinion, so if you feel like you’ve been treated unfairly by another company, call us – our family-owned, family-run company will bring you in and treat you as our own.
