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    Guarantee Heating

    5.0 (28 reviews)
    Closed 8:00 am - 4:00 pm

    Services - Guarantee Heating

    HVAC installation or replacement

    HVAC system repair

    HVAC system maintenance

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    2 years ago

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    9 years ago

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    11 years ago

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    Nshan A.

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    8 years ago

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    9 years ago

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    8 years ago

    Nshan worked over and above my expectations with honesty and integrity, So I don't think you can go wrong.

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    11 years ago

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    11 years ago

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    7 years ago

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    10 years ago

    We had our roof A/C and Heating package unit upgraded by this company. They did an excellent job, would recommend their services to anyone.

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    10 years ago

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    Review Highlights - Guarantee Heating

    Nshan had been to my house several years ago to service the furnace while he was working for another company.

    Mentioned in 17 reviews

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    AC Kings Energy Efficient Heating & Air

    AC Kings Energy Efficient Heating & Air

    (47 reviews)

    Mission Hills

    Oscar and his team installed a new unit 2 1/2 years ago that recently failed under a five year…read morewarranty. In spite of the reluctance of the manufacturer to replace the unit, even after Oscar had replaced several parts at his expense, Oscar continued to work with them until the manufacturer finally agreed to provide a new unit. It has now been installed and is working well. It would be difficult or impossible to find a firm as tenacious and willing to work in the customer's best interests, and in such good spirits.

    We ended up hiring AC Kings for two new projects: (1) to perform routine maintenance on all our…read moreexisting mini-split units, and (2) to replace our very, very old living-room mini-split AC with a new Daikin unit. As expected, their work on both projects was top-notch. Oscar and Karina continued to be highly professional and friendly, and everyone on the crew who came to help on both projects were also super friendly and respectful (including of people, our dogs + cats, and in general the space around our house), and from what I could tell they were very diligent and thorough. Re: the new unit: We've been using it now almost daily for about a month, now that the Valley summer is here. The unit has been working phenomenally and without a problem. I have a good sense of how much this work should cost based on recent estimates I got on another mini-split, so I believe that AC Kings' quote + bill was market competitive. But to be honest (and maybe I'll regret saying this out loud), I would probably pay just a little extra for Oscar's expertise and detail-oriented work. It's clear he knows his stuff. To support this last point, I should note that technically AC Kings came by a THIRD time to our house--on accident, because they were helping out my neighbor (who also said their work was excellent). I asked Oscar and his crew to check out an electrical problem we seemed to be having with our old mini-split. He did so and then didn't charge me for it. Can't recommend AC Kings enough.

    Around the Clock Heating and Air Conditioning - Factory Trained Residential Air Conditioning PROS Call 818 506-4400.

    Around the Clock Heating and Air Conditioning

    (702 reviews)

    Valley Glen

    I came across an offer from an affiliate of Home Depot for an AC tune-up for $8.88. Thought it was…read morea great bargain, and I'm sure many of you would too. So I'm going to give you a forewarning, it's a classic bait-and-switch (i.e get your foot in the door and then upsell). I was recommended a hard-start kit (aka compressor saver) and an air purification system. The cost? $1,800+. I told the tech that that's a bit steep for me, so he said, how much could you afford? I said maybe closer to $1,500. The tech called his manager and inform me that they would do it for that price. Initially, I was happy to receive a 20% discount. That is of course, until I googled the PlasmaPure 600 Series and the hard-start kit they sold me after the technician left, and discovered I paid $1,200+ for 2 hours of labor. This was back in June 2025. Give or take 10 months later, my air conditioner stopped working. Normally, I don't turn the AC on during the winter season, but as luck would have it, Los Angeles is having record breaking heat. I haven't used the AC for several months, and I only had a tuneup a few months before that. So I called the same company to determine why my AC wasn't working (hoping that they would stand behind their work). Upon opening the equipment, the hard-start kit they installed in June had exploded. The cause, according to their tech, was that my AC compressor was grounded. The good news? Because my Lennox unit was less than 10 years old, it's still under warranty. The cost to install and repair it? Over $5,000...yikes! :-z But the $88 you paid us today to inspect the unit will go towards the cost of the installation. That's how they get you by the way, by offering you a lower inspection charge. Since this company pulled a fast one on me last time, I decided to get a second opinion. I called Around the Clock considering it was them who initially installed my Lennox unit. They sent Oleg Stopsky out the very same day (I should mention that the other company took over a week to schedule a tech to come out). He confirmed that the compressor is in fact grounded. But because I'm a repeat customer, the cost of labor would be less than 1/3rd of what this other company quoted me. Additionally, the $125 I paid to have them come out to inspect, would be discounted from my total cost. I wanted to get a 3rd opinion just to make sure. I hate to say it, but when you're a solo female, you can easily get duped. When it comes to mechanical stuff, most technicians just assume you don't know any better...and in my case, it's somewhat true. That's why finding an honest company is so important. I contacted a company that was affiliated with Costco. They said they would give me a complimentary inspection. They too said that the unit was under warranty but their quote to repair was more than double of what Around the Clock offered me. I was glad that Around the Clock was the lowest because they were the most expedient and pleasant to work with. So as soon as Lennox sent Around the Clock the compressor, the contactor, and the capacitor, they scheduled Oleg to come out the very next day. I felt really bad because my AC is located on the roof of my building and we had record breaking heat today. But despite the unbearable heat, he remained jovial throughout. He did a superb job and was kind enough to install a permanent dryer filter when he learned that I had weak lungs. And just to show how honest they are, I asked Oleg if I should install a hard-start kit as recommended by the last technician, (because the previous one they installed in June exploded), he told me no. That since we replaced both the capacitor and the contactor (which were also under warranty), it's no longer necessary. This is probably why he's been with this company for over 25 years...because he's honest. I also like that I'm supporting a Ukrainian business. No more paying technicians from multiple companies to come out and inspect in the future. My HVAC company of choice is now Around the Clock. I'm so relieved to have air conditioning again...hallelujah!!

    After 26 years it was time to replace our old Lenox HVAC system. I hired Around the Clock Hearing…read moreand Air Conditioning again. I had a great experience with them 26 years ago. This time we chose an all-electric Heat Pump and will not be burning Natural Gas to heat our house anymore. They are based locally and have been in business for over 26 years. They sold us our old system and we had another positive experience this time, as I'm sure you will too if you are thinking of switching to a Heat Pump I recommend these good people. If you are a Costco member there are occasionally incentives offered as high as 15% of the purchase price in addition to other incentives available for a limited time that help offset the price of a new system. Thank you Around the Clock.

    Guarantee Heating - hvac - Updated May 2026

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