Jared has done an amazing job servicing our HVAC unit. He was kind and his work was clean. The best…read morepart is that he didn't over charge me. Great Job Jared I will keep your number on file.

We were having problems with our air conditioning units. The Jared and Elijah at paradigm Mech did…read morea great job fixing it, came out twice, insisted on getting to the root of the problem, and gave us a great price.

Andrew the owner came to the house and was just amazing! He is pleasant, clean, neat. Did excellent…read morework, added another cold air return vent , Replaced a fan for heater chamber , even went on roof and sealed all roof vents, who does this kind of caring quality work, Not many !!! Andrew IS the "A" in ALT does ! I Highly recommend as did our Plumber That is how we found Andrew !!! ALT Heating and Air Conditioning 619 916 8946 Sincerely Craig R Brown/ Patricia Devlin

ALT is now my favorite HVAC company. Today, its hard to come by companies as trustworthy and…read morecustomer service oriented as ALT. Heard about them through the SDG&E AC Quality care program (an absolute must in San Diego). Alex came out and did the most wonderful job on my 30 year old system getting it running like new! He cleaned the inside and outside of the systems, fixed a number of air leaks and general preventitive maintenance. Alex went above and beyond to help out. After Alex's work, the Air Conditioning system is working so well and blowing cold like it has never before. I could not be happier about ALT. He spent the time to explain what he was doing and why. Answered all of the questions I had about his work and HVAC. Super nice guy to boot. Absoute incredible service to the point that I can wholehartedly reccomend ALT for any HVAC needs. I will be using ALT when I upgrade my system in the future.

GJS Heating and Air Conditioning was recommended to me by someone in the trades. Since I'm a…read morebeliever in word of mouth, I called the number given to me. John Carlson came out that day, and gave me a bid. I thought the numbers looked reasonable, and he started work right away, putting in a ductless HVAC unit. John was professional, and when he finished the installation, it was operating perfectly. Several weeks later, I started having trouble with my HVAC system. The fan was working, but the unit wasn't cooling. I wondered if I was doing something wrong, and looked at some You Tube videos. Nothing I saw, or attempted, seemed to work. It didn't help that this breakdown had happened in the middle of a heat wave, and I seriously doubted a quick fix was imminent. Nonetheless, early this morning I sent a text to John, explaining the situation. Given the excessive heat, I knew how busy he had to be. Despite that, he responded to my text and said he would try and shoehorn me into his schedule. Within hours, he was at my doorstep, and working on the problem. It turned out that the coolant had escaped through a defective flange. The system is now working perfectly, and I'm a cool cucumber despite it being 92 degrees outside. You know you've picked the right HVAC person when they respond with such alacrity to a problem. It might seem that the safe HVAC choice would be one of the big firms that advertises relentlessly on TV. Trust me, though, you'll be happier going with the "little guy" that is GJS Heating and Air Conditioning.

Gary from GJS came out to my mother in laws' to look at her broken heater. After spending almost an…read morehour diagnosing the problem he fixed it with the flick of a switch. He refused any compensation for his time and had a professional attitude and smile throughout. It 's great to know there are fair honest repair people left in the world. I will always call him first for any of my fix-it needs.

We had a great experience from start to finish. The communication was excellent, the pricing was…read morefair, and the entire process was smooth and stress-free. Nick and Marco were outstanding. They arrived on time, were professional, personable, and took the time to thoroughly inspect our old system and explain why our AC was leaking. They installed our new HVAC system with great attention to detail and made sure everything was done right. Nick and Marco were friendly, knowledgeable, and genuinely easy to work with. It's clear they take pride in their work and care about their customers. We couldn't be happier with the experience and would highly recommend them to anyone looking for a trustworthy HVAC company.

We hired Paulson in San Diego to replace a 3-ton compressor for our Bankers Hill condo, trusting…read moretheir status as a (former) HOA-preferred vendor. Instead, they installed an undersized 2.5-ton unit without performing a standard heat load calculation. The Technical Failure: For months, our system failed to cool. Paulson's technicians repeatedly blamed our ducting--which had never been an issue--rather than admitting the unit was undersized. The error was officially documented during our home sale when the unit failed inspection. The HOA's new preferred HVAC vendor confirmed the mismatch, leaving us to deal with the fallout during escrow. The Customer Service Experience: Dishonesty: When presented with a professional load calculation, management dismissed it, claiming I had simply "plugged it into the internet" rather than acknowledging the data from a licensed contractor. Zero Accountability: Management refused a refund, hiding behind "you signed the contract" to avoid taking responsibility for their own sizing error. The Financial Impact: This negligence cost over $8,000 for the initial mismatched installation, plus several thousand more for a correct replacement required to close the sale. There is a reason the Laurel Bay HOA in Bankers Hill no longer contracts with this company. It takes more than one bad job to lose HOA-preferred vendor status. Save yourself the $8k+ nightmare and hire a firm that performs industry-standard tests before installing equipment. Do not trust their "judgment" over actual data.

Great people. Jace and his partner, Travis. answered all of our HVAC questions, competitive prices…read moreand did the work as promised. would recommend them!

It was unfortunately not expected to get an AC repair tech to come down within the same day during…read moresummer time. First company I called was booking 2 days out. I instead opted to call someone local to me (Escondido) instead of someone having to drive from 20 miles out. I called Monday morning, was booked for that same afternoon as our AC decided not to work at 1am. Surprisingly, Jim arrived just before 12pm as he was already in the area. I very much welcomed the early arrival as the heat was starting to escalate. It took Jim literally 3 minutes to diagnose the problem of our AC, a burnt relay contact (I wrongly predicted a faulty capacitor). This is how you know you are dealing with an experienced professional when he brings out only the necessary tools and leaves the work site clean. Jim was in and out in about 35 minutes (should have been less than 30 if I hadn't asked questions). As they say in the industry, there are no second chances for first impressions, Because of this, I'll give them my business for AC maintenance moving forward due to my great experience, promptly saving me and family from roasting in an above average SoCal summer. Cost (part + labor) was very fair and no hidden or surprise charges. More blessing to you Jim and your crew.

My house was built in the early 80's. I purchased it in 2016 & honestly believe the HVAC unit is…read morethe original. One day, my unit just stops blowing hot air. Now, living in San Diego, this really isn't an issue but every now and then Escondido has extremely cold nights. I decided to have the unit inspected looking for advice on repairs. Listening to KSON, they recommended Mauzzy ( spelling???) heating and air so I called them for a $99 inspection. Long story short, the guy said my unit was too old and he recommended replacing the entire unit for $16-20k. I said nope and he left. I was at my favorite coffee shop telling a friend about this when another gentleman overheard me. He recommended Jim to me. Jim comes out, runs a few test & in less than 10 minutes finds the issue. He had to order the part so I had to wait a few weeks ( no big deal ). He gets the part in, schedules a convenient time for me to install the part costing me a total of $220. I cannot recommend Jim enough, he is truly honest, reliable, & dependable. Imagine being told you needed $16k replacement when all you needed was $200 part.... I can't recommend him enough. I've already told all my neighbors about him.

My AC had a water leakage problem last week that caused it to shut off shortly after being turned…read moreon. I called One Stop Comfort Center, and they sent a technician the same day. Sunny was very professional and conducted a thorough inspection of multiple areas, including outdoor, and indoor unit, the drain pipe and sensors. He was able to identify the source of the leak and reroute the water flow to prevent the sudden shut-off. The solution has been working effectively, and the AC has been able to run overnight without any further issues. I am very happy with the service and highly recommend One Stop Comfort Center to anyone needing AC repair or maintenance. Carol

If I can give ZERO I would! Do yourself a favor and call someone else…read more An email was sent at 6 am stating he'd be at the house 11am. Didn't show up till AFTER 4.

Great experience! The team was professional, on time, and did an excellent job installing our…read moresystem. Everything works perfectly, and they left the area clean. Highly recommend for anyone needing reliable HVAC service.

We couldn't be happier with this Great Company.! They found a gas leak that traveled up into the…read moreattic! & SDG&E came out but they didn't find it. It could of been horrible for us so Thank God Jaime crew finds this & repair the new gas pipe. We live our new system a/c& heat we will be giving you business. To all our family & friends This company is reliable, & clean when working, and great prices,professional, & a good crew Thanks again Jaime Arce