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San Marcos Heating Services: Comprehensive Furnace Services
Expert Diagnosis & Repairs by Oasis

In the climate of Southern California, while most days are warm, there are periods where temperatures can drop significantly. During these times, a well-functioning furnace becomes an essential component for home comfort. If homeowners encounter issues such as furnaces that won’t start, emit loud or unusual sounds, cycle with higher frequency, or fail to adequately warm the house, it’s imperative to seek the expertise of a licensed furnace repair specialist without delay.

Your Go-To HVAC Contractor

Over the years, Oasis Heating & Air Conditioning has established itself as a preferred choice for furnace repairs for households across San Marcos and surrounding regions. Here are a few reasons:

  • Comprehensive Repair Knowledge: Our team has the expertise to handle a wide range of furnace issues, from minor glitches to major repairs, across various brands and models.
  • Accuracy in Repairs: Prioritizing accuracy, we strive to resolve furnace issues on our first visit, guaranteeing durable solutions and the satisfaction of our homeowners.
Commitment to Transparency and Service Excellence

Building long-term relationships with our clients is a priority at Oasis Heating & Air Conditioning:

  • Clear Communication: We believe in clarity. By breaking down the details of your furnace's health into easy-to-understand terms, we make sure you're always aware of how your system is doing.
  • Thorough Furnace Evaluation: Every time we pay a visit, it's more than just a quick fix. We dive deep into your entire HVAC system, spotting opportunities to enhance its performance and ward off potential issues down the line.
Oasis Promise: Thorough & Guaranteed Furnace Repairs

When homeowners in San Marcos choose our furnace repair services, they can expect:

  • In-depth System Analysis: Every furnace inspection is thorough, ensuring that every component is examined for optimal functionality
  • Clear Repair and Replacement Options: Once we have checked everything out, homeowners get a clear breakdown, highlighting our suggested fixes or possible replacements.
  • Transparent Pricing Structure: We stand by our straightforward pricing. With us, you'll get clear, upfront quotes every time.
  • Prompt Repair Services: Recognizing the importance of heating in colder periods, we strive to complete necessary repairs within the same day of the service call.
  • Guaranteed Quality: At Oasis Heating & Air Conditioning, we stand by our work with a labor guarantee, emphasizing our dedication to top-notch service and your peace of mind.
Signs It’s Time to Replace Your HVAC System

Age: Like any mechanical system, it will fail overtime.

High Energy Bills: Older models are less efficient & will lose efficiency as they get older.

Frequent Repairs: Repairs aren’t uncommon, but if they are required often, the system is likely at the end of its lifespan.

Frequently Asked Questions

How often should my furnace be serviced?

Regular check-ups, preferably once a year before the cold season, can ensure your furnace operates efficiently and lasts longer.

How long does a furnace typically last?

With regular maintenance, most furnaces have a lifespan of 15-20 years. However, this can vary based on usage, model, and how well it’s been maintained.

Should I repair or replace my old furnace?

While we always try to repair first, sometimes replacement might be more cost-effective in the long run, especially if your furnace is more than 15 years old or facing significant repair costs.

Is it safe to use my furnace if I suspect an issue?

If you notice odd smells (like a gas smell), it’s best to turn off your furnace and call us immediately. For other issues, while the furnace might operate, it’s better to get it checked sooner to avoid further damage or inefficiencies.

Warm Up with Oasis

Look, we get it – when it gets chilly in San Marcos, you just want a furnace that works. No fuss, no drama. That’s where Oasis Heating & Air Conditioning comes into play. We’re your local buddies who know a thing or two about keeping homes cozy. Whether it’s a tiny hiccup or a big ol’ furnace meltdown, we’ve got your back. Why? Because your comfort is our priority. So, next time your furnace throws a fit or even if you’re just thinking it might be time for a check-up, give us a call

Trusted HVAC & Plumbing Excellence in San Marcos: Experience the Oasis Advantage

100% Satisfaction Guarantee

Providing top-tier HVAC & plumbing services is our standard. With warranties that exceed the usual industry standards for both equipment and labor, our utmost priority is to ensure your complete satisfaction with every project.

Experienced & Knowledgeable

Boasting over three decades in the HVAC & plumbing fields, our team delivers unparalleled expertise to every task. Our commitment to ongoing training and learning guarantees state-of-the-art solutions and premier service for all your home comfort needs.

Fair, Upfront Pricing

Marrying excellent AC, heating & plumbing expertise with clear, upfront pricing is our pledge. You can anticipate competitive rates without any unexpected costs or hidden charges, and our install and replacement estimates will always be free!


We firmly believe that everyone deserves optimal indoor comfort, regardless of budget constraints. Explore our flexible financing options to ensure home comfort without the financial stress.

Above and Beyond Factor

Our dedication to excellence is not just about systems and solutions. It is about the relationships we build. Every interaction, big or small, is valued. We strive to ensure that everyone—whether a loyal customer or a first-time inquirer—feels the depth of dedication and expertise our team brings.

Give Us a Call! Or Let Us Contact You!
(619) 626-2499

    Don’t Listen to Us.
    Listen to Our Past Clients.

    Vinny B
    Vinny B
    Can't say enough good about this company. They worked with me on price and they offered a labor warranty much longer than the other companies. They are masters at the craft to as they addressed all the old issues I had with the system that was replaced. The new system is working great. They replaced both my heater and air conditioner and did it all in a day. Appreciated the follow up to see how everything is going as well. Get a quote from Oasis for any hvac project. I'm glad I did.
    Paloma Santiago
    Paloma Santiago
    This review is long overdue but I have had time to enjoy our new ac and heater that Oasis heating and air conditioning installed a few months ago. We saw one of their ads on Facebook and requested someone to contact us. We contacted a few companies from ads we saw. Oasis immediately stuck out to us because the gentleman who came showed us their license card when we came to the door. None of the other companies did that so it was different but it was also reassuring since we knew we were making a big investment in our home. One of the issues with our previous system was the poor air flow in our master bedroom. Michael was the only one to recommend increasing the vent to help. Instead of just giving us a quote really quick we could tell he listened to what we talked about and was really trying to fix the issues we had with the old system. They weren’t the lowest bid although close but they were nowhere close to the highest either. Overall we felt most comfortable with Oasis. The install was completed in two days and we have used our ac on many occasions since and weak airflow is fixed. I also tested out the furnace the other morning for the first time too. We are thankful to have found this company and have recommended them to a few other friends and family.
    Beata Zabnicka
    Beata Zabnicka
    Response time is great and very professional!
    Armando Acuna
    Armando Acuna
    Oasis was able to come out for an estimate the same day that I found them on Google. The guy who came out was here longer than some of the other companies sales people and he explained that they try to do as thorough of an inspection as possible when providing an estimate. He went into the attic to check out my old system while some others didn’t. Given the amount of time he dedicated just for a free estimate I was expecting the price to be high. It was quite the opposite and more competitive than most. It wasn’t the lowest but they quoted me the brand I mentioned and most of all I felt confident they would do good work given the effort they put into the estimate. The install was schedule and completed a few days later and everything is working perfectly. The house cools really quick and the system very quiet. I recommended them to a friend already and am glad I found them.
    K G
    K G
    I have been needing to upgrade my home air conditioning system for the past few years and have been putting it off. Instead of doing a repair this year I decided to get a whole new system. I interviewed several companies and decided on Oasis. I was somewhat nervous since they are a new company but that quickly went away. They communicated well, finished the job on time and showed me how to use the thermostat. Also they tested the system afterward while they cleaned up to make sure everything worked. I’m happy I gave them the chance. :)
    michael hurtado
    michael hurtado
    I found Oasis when looking up someone to replace my AC. They were able to give me an estimate that same day and then install everything even that same week. Everything is working perfectly. Appreciate them being so fast so I could stay cool during the heat wave.
    Josh Sotelo
    Josh Sotelo
    Got in touch with oasis when my ac unit suddenly went out. They showed up within a few hours and fixed the issue. Unit is still working and price was reasonable. Give them a call if you need help.