Furnace Repair Sunnyvale

Find Furnace Repair in Sunnyvale

Get 3 FREE Furnace Repair quotes for your project today! Compare profiles, reviews, accreditations, portfolio, etc... and choose the best deal.

Service Needed
City or Town
Find Pros
  • Nur HVAC
    4.9
    1078 Wentworth St, Mountain View, 94043, US

    Nur HVAC is a professional HVAC company providing fast, honest, and friendly service that exceeds your expectations. Our mission is to provide exceptional service and ensure customer satisfaction. We stand behind our work with a 100% money-back guarantee. If you're not fully satisfied, we will refund your money, apply a discount on the next service! Our team of certified professionals is committed to excellence, and our track record of positive reviews reflects our dedication to quality service.

    Get Quote
  • MYC Appliance Repair
    4.8
    442 Cirrus Ave, Sunnyvale, 94087, US

    MYC Appliance is an appliance repair company with years of experience in the field. Our team of professional technicians is dedicated to providing high-quality, reliable appliance repair services to customers in the US. We understand the importance of having your appliances working properly, and we strive to provide fast, efficient, and affordable solutions to all your appliance repair needs. Our mission is to offer our customers the best possible service by providing same-day or scheduled appointments, performing thorough diagnostics, and using quality parts. We stand behind our work with a 3-month warranty on parts and labor. At MYC Appliance, we believe in transparency and customer satisfaction. We offer free diagnostics with any repair service, and our initial service fee includes the trip charge and diagnostics. We also provide discounts for first-time and senior customers. Contact us today to schedule an appointment and experience the MYC Appliance difference.

    Get Quote
  • Same Day Air Conditioning & Heating
    4.7
    Sunnyvale, US

    Same Day Air Conditioning and Heating is a Santa Clara HVAC company that provides same-day service for air conditioning and heating repair, installation, and maintenance. Our licensed technicians specialize in the installation, maintenance, and repair of heating and cooling systems, servicing all makes and models, offering free in-home estimates, and 24-hour emergency service. We serve the San Francisco South Bay area, including Menlo Park, Santa Clara, Los Gatos, Los Altos, San Jose, Sunnyvale, and surrounding cities. Our goal is to provide affordable and reliable HVAC service to our customers, and we strive to have your home comfortable and cozy. We specialize in the service and repair of most residential and light commercial heating and air conditioning applications, as well as air quality control, duct cleaning, sealing, and replacement. We are experts at repairing and servicing your equipment and aim to have it up and running as soon as possible.

    Get Quote
  • DunRite Heating & Air Inc.
    3.8
    Sunnyvale, US

    We are available to answer your calls everyday from 8:30 AM to 8:00 PM. As the owner of DunRite Heating & Air, Inc., my business model has evolved over the last couple of years. I believe that with the ever-changing, uncertain times that we all live in that the “business as usual” philosophy that is still held by most of my competitors is a fatal mistake. The days of high-pressure sales tactics and always trying to upsell is a 2004 way of doing business. Today is a new economic time in our country, and in order to succeed in business, a business must recognize and adapt accordingly. With that said, I am taking a personal involvement in all aspects of the company’s daily operations. You have my commitment that our appointment times will be kept, and all of our employees will be polite, courteous, and respectful of your home and property. We will always provide up-front pricing and honor the price that is given—no up-selling midway through the job. In conclusion, if DunRite Heating & Air, Inc. is fortunate enough to do whatever work you may need, you will have my personal guarantee that you, your family, and your home will be treated with absolute professionalism.

    Get Quote
  • Sunny HVAC and Appliance Repair
    4.3
    Sunnyvale, US

    Get Quote
  • Finest Heating & Air
    4.9
    Sunnyvale, US

    Get Quote

Over 16,949+ HVAC Companies on our platform

Our HVAC experts operate in Sunnyvale and beyond!

HVACCompaniesHub has curated and vetted Top HVAC Companies in and around Sunnyvale. Find a trustworthy contractor today.

Frequently Asked Questions about Furnace Repair

Having problems with your heating system? Get answers to common questions about furnace repair and find trusted local technicians.

What are the most common furnace problems?

Common furnace problems can include::
  • No Heat or Reduced Heat Output: This can be caused by a variety of issues.
  • Strange Noises: Unusual sounds like banging, squealing, or rumbling can indicate problems with the blower motor, igniter, or other components.
  • Short Cycling: This is when the furnace turns on and off rapidly, which can be caused by a faulty thermostat, an overheating furnace, or a clogged air filter.
  • Pilot Light/Ignition Problems: In older furnaces, a faulty pilot light can prevent the furnace from igniting. In newer furnaces, issues with the electronic ignition system can cause similar problems.
  • Blower Motor Issues: If the blower motor isn't functioning, your furnace may not distribute heat properly. A malfunctioning blower motor can cause reduced airflow, uneven temperatures, and loud noises. should be addressed by a technician.
  • Dirty Air Filter: A dirty filter restricts air circulation. It may lead to more serious problems.
  • Cracked Heat Exchanger: This is a serious safety hazard, as it can lead to carbon monoxide leaks. This is considered an emergency.
Don't attempt DIY repairs if you're not qualified.

What is the difference between a single-stage and two-stage furnace?

Single-stage and two-stage furnaces differ in their heating output capabilities:
Single-stage furnaces operate at only one output level – full capacity. This can lead to temperature fluctuations and higher energy bills because the furnace is either running at its maximum setting or completely off..
Two-stage furnaces offer two levels of heat output: a lower setting for mild weather and a higher setting for colder temperatures. This allows the furnace to modulate its output based on the actual heating demand, resulting in more consistent temperatures, quieter operation, and improved energy efficiency.Two-stage furnaces provide enhanced home comfort and energy savings compared to single-stage models.

What is a heat exchanger in a furnace?

The heat exchanger plays a key role in a furnace. It is responsible for transferring heat from the combustion process to the air that circulates throughout your home. . The heat exchanger also acts as a barrier between the combustion gases and the circulating air, preventing harmful gases, such as carbon monoxide, from leaking into your living space.. Cracks in the heat exchanger can be very dangerous, causing carbon monoxide to enter your house. Annual maintenance by a professional is highly recommended.

How can I tell if my furnace is the correct size for my home?

A properly sized furnace is essential for efficient and comfortable heating. An too-small furnace will constantly run and struggle to heat your home effectively, especially in cold weather.. An too-large furnace will short cycle, causing wear and tear, inconsistent heating, and inflated utility bills. Here are some signs your furnace may be improperly sized:
  • High Energy Bills: An incorrectly sized furnace can lead to increased energy consumption.
  • Inconsistent Temperatures: Noticeable temperature fluctuations between rooms.
  • Short Cycling: If your furnace turns on and off frequently, it could be an indication and wasting energy.
  • Poor Air Quality: If the airflow from the vents seems weak or there are hot and cold spots, the unit may be the wrong size.
  • Excessive Noise: A furnace that's too large can make loud or unusual sounds
If you suspect your furnace is improperly sized, it's essential to consult with an HVAC professional. A Manual J load calculation can accurately determine the appropriate furnace size.. A proper sizing calculation is a worthwhile investment for optimal comfort and energy efficiency.

What are the most common furnace problems?

Common furnace problems can include::
  • No Heat or Reduced Heat Output: This can be caused by a faulty thermostat, a clogged air filter, or a malfunctioning igniter.
  • Strange Noises: Unusual sounds like banging, squealing, or rumbling can indicate problems with the blower motor, igniter, or other components.
  • Short Cycling: This is when the furnace turns on and off too frequently, reducing efficiency and potentially causing damage.
  • Pilot Light/Ignition Problems: Make sure your pilot light is on, or your ignition system is functioning correctly.
  • Blower Motor Issues: If the blower motor isn't functioning, your furnace may not distribute heat properly. A faulty blower motor requires attention.
  • Dirty Air Filter: A clogged air filter restricts air circulation. It can also cause overheating and damage..
  • Cracked Heat Exchanger: This is a serious safety hazard, as it can lead to dangerous gasses entering your home. A cracked heat exchanger needs to be repaired or replaced immediately.
If you are experiencing any of these issues, it is important to contact a qualified HVAC professional for diagnosis and repair.

What is the difference between a single-stage and two-stage furnace?

Single-stage and two-stage furnaces have operational differences.
Single-stage furnaces operate at only one output level – full capacity. This can lead to uneven heating and fluctuating bills because the temperature fluctuates more than with two-stage furnaces.
Two-stage furnaces offer two levels of heat output: a lower setting for mild weather and a higher setting for colder temperatures. This allows the furnace to modulate its output based on the actual heating demand, resulting in more consistent temperatures, quieter operation, and improved energy efficiency. A two-stage furnace may be a more expensive initial investment, but it can provide greater comfort and savings over time.

What is a heat exchanger in a furnace?

The heat exchanger plays a key role in a furnace. It is responsible for transferring heat from the combustion process to the air that circulates throughout your home. . It's a safety feature separating exhaust gases. Cracks in the heat exchanger can be very dangerous, causing carbon monoxide to enter your house. Annual maintenance by a professional is highly recommended.

How can I tell if my furnace is the correct size for my home?

A correctly sized furnace is crucial for efficient and comfortable heating. An too-small furnace will constantly run and struggle to heat your home effectively, especially in cold weather.. An oversized furnace will cycle on and off too frequently, wasting energy and shortening the system's lifespan.. Signs that your furnace may not be correctly sized include::
  • High Energy Bills: An oversized furnace can lead to increased energy consumption.
  • Inconsistent Temperatures: Noticeable temperature fluctuations between rooms.
  • Short Cycling: If your furnace turns on and off frequently, it could be an indication and wasting energy.
  • Poor Air Quality: If the airflow from the vents seems weak or there are areas with inconsistent temperatures, the unit may be the wrong size.
  • Excessive Noise: Oversized furnaces can make loud or unusual sounds
If you suspect your furnace is improperly sized, it's essential to consult with an HVAC professional. Ask a professional for a load calculation to confirm appropriate sizing. A proper sizing calculation is a worthwhile investment for optimal comfort and energy efficiency.