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HVAC Repair Services in San Francisco

System not cooling, not heating, or making strange noises? Call (415) 915-9945 for HVAC repair in San Francisco. We’ll diagnose the issue and give you a clear estimate before any work starts.

Heat pump equipment beside a residential property

Why Accurate HVAC Diagnosis Matters

When you need heating or cooling repair, you want a company that can identify the actual issue and explain the available options.

Here’s why: 

  • One symptom can have several possible causes
  • Proper testing supports better repair decisions
  • Guessing can lead to unnecessary work and expense

For example, poor cooling may be caused by an airflow issue, an electrical problem, a dirty coil, or a failing component. A proper diagnosis helps identify the cause before any repair is recommended.

Our technicians inspect the system, explain what they find, and recommend repairs based on the cause of the problem.

HVAC Problems We Diagnose and Repair

Our experienced and certified technicians deliver professional HVAC repair in San Francisco to get your system back up and running.

Common issues we repair include but are not limited to:

HVAC Not Cooling

Insufficient cooling is often caused by a thermostat setting, a dirty condenser coil, a frozen evaporator coil, or less commonly a failed compressor.

HVAC Not Heating

No heat can be caused by thermostat or airflow issues, an ignition or flame-sensing problem in a gas furnace, or an electrical or control issue. Heat pumps may also have refrigerant, defrost, or component-related problems.

HVAC Won’t Turn On

Is your system not starting? It could be dead thermostat batteries, a tripped breaker, a bad capacitor or a tripped safety switch.

Weak Airflow

Airflow problems are a common issue we deal with as an HVAC repair company. They are often caused by a dirty air filter, ductwork leaks, blocked vents, or a failed blower motor. We also repair and modify ductwork when leaks, restrictions, or damaged sections are affecting airflow.

Strange Noises or Odors

Unusual noises can be caused by loose components, a failing motor, or other mechanical issues. Musty odors may point to moisture or drainage problems, while burning or electrical odors should be addressed promptly.

Short Cycling or Constant Running

Frequent cycling or unusually long run times can be related to airflow restrictions, thermostat or control problems, electrical component issues, refrigerant-related problems, or system sizing.

Why San Francisco Customers Choose Neon Heating & Cooling Services

Local HVAC Experience

As an HVAC repair company in San Francisco, we service central AC, furnaces, heat pumps, and ductless mini-splits.

Clear Recommendations

We explain the issue, recommend the repair, and provide an estimate before work begins.

Responsive Scheduling

Request service online or by phone, including after hours. Appointments depend on technician availability.

Licensed, Trusted Service

NEON Heating & Cooling is a California-licensed HVAC contractor (CSLB #1156494). Refrigerant work is performed by EPA Section 608-certified technicians.

Heating and Cooling Equipment We Service

We repair a wide range of residential systems in San Francisco:

Heat Pump Installation

Air Conditioning Systems

We diagnose central AC problems, including airflow issues, electrical faults, coil problems, refrigerant-related concerns, and failed components.
AC Installation

Furnaces

A furnace that will not heat or cycles frequently should be evaluated. Our HVAC service technicians diagnose ignition, flame-sensing, blower, airflow, control, and other furnace-related issues to identify the cause of the problem.
NEON HVAC SERVICE

Heat Pumps

Heat pump issues can affect both your heating and cooling comfort. Our experienced technicians diagnose and repair issues such as refrigerant leaks, compressor issues, valve failures and more.
Outdoor HVAC equipment beside a home

Ductless Mini-Split Systems

Ductless units require specialized knowledge when something goes wrong. We fix refrigerant leaks, drainage issues, electrical faults, and other problems that affect ductless units.
Heat Pump Installation

When Should You Schedule HVAC Repair?

Here are the warning signs worth a service call:

  • Your heating or cooling has stopped completely
  • Uneven temperature is making your home less comfortable
  • Airflow from your air conditioner or furnace is weak
  • Your system runs constantly or starts and stops frequently
  • You’re hearing new or persistent noises
  • Warm air blows out when it should be cool
  • Unusual odors appear when the system is running
  • The temperature doesn’t match what’s set on the thermostat
  • A minor problem can sometimes affect additional components if it is left unaddressed.

Scheduling a diagnostic visit early can help identify the issue before it becomes more involved.

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    Our HVAC Diagnostic and Repair Process

    Our residential HVAC repair in San Francisco follows a straightforward process. 

    Understand the Symptoms

    Before we do anything else, we need to get an accurate picture of the problem. We’ll ask you to explain the symptoms that led to your service call.

    01.

    Inspect and Test the System

    Once we have an idea of what’s going on, we’ll inspect and test your system. We may look at your ductwork, electrical controls, and other components that could be causing the problem.

    02.

    Identify the Cause

    We use our expertise and professional tools to find the root cause of the problem. A clear diagnosis allows us to make more precise recommendations.

    03.

    Explain the Recommended Repai

    Our technician explains the cause of the issue and the recommended repair, then provides a clear estimate on site.

    04.

    Complete the Repair

    Once you have approved the work, we’ll get to work. Our HVAC technician works efficiently to fix the problem and get your system back up and running.

    05.

    Check System Operation

    Before we leave, we test system operation to confirm that the repair addressed the diagnosed issue.

    06.
    NEON tech

    What Our Customers Say

    Google
    Vic B profile picture
    Vic B
    Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
    Our experience with Freon HVAC has been exceptional for a full panel upgrade to 200 amps and installation of a new Mitsubishi mini-split system in an old house. We took quotes from 4 different top rated hvac providers in the San Jose area, before deciding to go with Freon. I appreciated the honesty and detailed analysis of our needs by Slava when he first showed up to do an estimate. He asked a ton of questions, checked the house for existing setup, wiring, possibilities, and discussed multiple possibilities including ducted, gas, hybrid, and heat pump only. Once we decided to go with a specific type of configuration, he gave us multiple options. Their pricing was competitive and while it took forever for PGE to get to the wiring/transformer upgrade, Freon's team worked with them patiently to meet our needs. Special thanks to Jessica for regular follow ups with PGE and us. Once PGE scheduled the wiring upgrade (after 3 months), Freon's team was prompt and did a very clean install including all internal wiring and drainage work. They ensured city inspection was scheduled promptly and addressed all city concerns for a quick approval. I have not dealt with a more professional and competent crew in this area in a very long time. Would love to do business with them again.
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    Christopher L profile picture
    Christopher L
    Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
    ​I usually doubt perfect 5-star ratings, but Freon completely earned theirs. My AC/heater combo unit broke, and every other company told me I needed a total replacement, quoting me between $9k and $12k. ​Freon came out to inspect it, and later that day, they gave me a quote for just $3,000 to repair it. I signed the contract that night, and they were back to do the work just 5 days later on June 19th. ​The tech replaced the compressor to get it running, but didn't stop there. He thoroughly tested the system, caught a power issue, and replaced the compressor relay and expansion valve to ensure the unit wouldn't break down again. Outstanding service. I'm finally set for the summer and winter. They deserve every single star!
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    Mark Teffeteller profile picture
    Mark Teffeteller
    Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
    Very reliable. Our technician Gary went above and beyond to help with a replacement. Highly recommend!
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    Yinan Kong profile picture
    Yinan Kong
    Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
    I’m so impressed with the technician’s expertise! He’s a true professional and finally fixed an overheating issue that we’ve been struggling with for years. Highly recommended.
    Google
    Chris Wu profile picture
    Chris Wu
    Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
    Good job Ali , thank you .
    Google
    Natasha Russo profile picture
    Natasha Russo
    Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
    Great experience overall! Guys are respectful knowledgeable reasonably priced quick clean highly recommend for your HVAC needs! Patient and explained all my questions had a new gas heater installed and they took Great care put in new everything valves air filters etc. Thank you!
    Google
    DON BARKLEY profile picture
    DON BARKLEY
    Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
    They did all the necessary homework before they came and as such they had the right part and did ti the job per the online quote. I particularly like the timely communication of their arrival time schedule.
    Google
    Jordan Lai profile picture
    Jordan Lai
    Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
    Excellent service and friendly consultation and very quick response!!!
    Google
    chris dieter profile picture
    chris dieter
    Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
    Install heat pump change out on existing ducted system to replace gas furnace
    Google
    Holly L profile picture
    Holly L
    Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
    Friendly and professional. There was a misstep accident that caused some damage and they repaired it right away.

    Serving San Francisco and Nearby Bay Area Communities

    NEON provides residential HVAC repair throughout San Francisco and nearby Bay Area communities.

    Trusted Brands We Service

    neon heating cooling services

    Ready to Get Your HVAC System Working Again?

    A broken HVAC system doesn’t have to stay that way. Our residential HVAC repair services get your system back up and running, whether it’s your AC, furnace, heat pump or ductless unit.

    The experienced technicians at NEON Heating & Cooling will diagnose the problem, explain your options clearly, and provide an estimate before repair work begins.

    Looking for HVAC repair near you in San Francisco? Contact us today to schedule a visit.

    Answers to Your Recovery Questions

    Frequently Asked Questions

    The issue could be a thermostat or control problem, a dirty air filter or condenser coil, restricted airflow, a refrigerant leak, an electrical issue, or a compressor problem. Ductwork problems can also affect cooling. We diagnose the cause and recommend the appropriate repair.

    A system that is not heating can have different causes depending on the equipment. Furnaces may have ignition, thermostat, airflow, or blower issues. Heat pumps can have refrigerant, electrical, defrost, or control problems. For heating and cooling repair in San Francisco, our technicians pinpoint the cause and recommend the right repair.

    Short cycling means your system starts and stops more often than it should. A dirty air filter, thermostat issue, electrical failure, refrigerant problem, or improper system sizing may be the cause. It also wastes energy and puts extra wear on components. Have the system checked before the issue becomes more involved.

    Before scheduling service, check that the thermostat has power and fresh batteries, if applicable. Also check whether the breaker has tripped or the system was turned off accidentally. If those basic checks do not resolve the issue, schedule an HVAC diagnostic visit to identify the cause.

    Independent cost data for San Francisco puts the average furnace repair at about $504, with most repairs ranging from $178 to $866. HVAC repair costs can vary significantly depending on the type of system, the part involved, and the complexity of the work.

    As a local HVAC repair company, NEON charges $59 for a diagnostic visit. Our technician identifies the issue and provides the exact repair price on site before any work begins. If you move forward with the repair, the $59 diagnostic fee is credited toward the cost.

    Most straightforward repairs can be handled in one visit. Bigger repairs may take several hours. If we need to order a part, a return visit may be necessary. We’ll give you a clear timeline after we diagnose the issue.

    Our techs inspect your system to find the source of the problem. The visit may include checking airflow, electrical components, controls, and the refrigerant system. We walk you through what we find, explain your repair options, and provide an estimate before any work begins..

    GET IN TOUCH

    Contact Our HVAC Specialists Today

    NEON HVAC SERVICE
    Commercial HVAC Services
    Years of experience
    0 +
    Request Your Estimate

      By submitting this form, you agree to our Privacy Policy and consent to being contacted regarding your inquiry.

      NEON Heating & Cooling
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