top of page


Our knowledgeable HVAC technicians have the tools, knowledge and skills to diagnose your heater’s problems. We will resolve the problem, restore comfort, and help you attain cost savings with repairs done right the first time. If your system is beyond repair or if installing a new furnace is the better long-term option, leverage our experience to help you make the right furnace purchasing decision.


We recommend Day & Night products because they deliver the best values to homeowners seeking performance and comfort. However, we carry a variety of brands and can accommodate most requests.  Please ask one of our contractors to recommend the proper package for your home and budget.

  • How long do furnaces typically last?
    Residential furnaces typically last 15 to 20 years. With regular maintenance, their life span can be extended even longer.
  • Blower Fan Does Not Turn Off
    Usually, the fan limit switch may be set to “manual override”, but it can also be a shorted wire in the thermostat, or at the fan limit switch.
  • Performance Does Not Improve After Changing Air Filters
    Dirty air filters can reduce the airflow, making your furnace strain to circulate heat. Air filters should be changed every three months. Clogged filters can sometimes damage your limit switch, which operates the fan.
  • Energy Bills Going Up
    Your furnace can make natural gas bill go up if the thermostat is not regulating temperature correctly, or if there are clogged vents or dirty air filters.
  • Burning Smell When Heat is Running
    When the furnace isn’t being used, dust and dirt settle on inner components. When you first use the furnace in colder months, you’ll smell this dust burning off. If you smell it every time, something may be amiss with your furnace.
  • Thermostat Not Working Correctly
    If your furnace does not turn on, or does not regulate temperature, you might have a faulty thermostat.
  • Furnace Not Heating Up
    The most common reasons for a furnace blowing cold air are dirty air filters, a blown pilot light, or a faulty thermostat. There can also be issues with ignition, a gas valve, the blower fan, or other components.
  • Ignition or Pilot Light Malfunctioning
    This can be dues to a faulty thermocouple or blocked gas valve.
  • Furnace is Noisy When it Runs
    A buzzing sound from your furnace may indicate an electrical problem. If you hear a loud noise as it starts up, this may be “delayed ignition”, a serious issue where an excessive amount of natural gas builds up in the combustion chamber before igniting. Call a licensed HVAC company immediately.
  • Carbon Monoxide Detector Going Off / Sulfur Smell
    Carbon monoxide is a byproduct of natural gas furnaces burning fuel. Normally, this is contained withing the heat exchanger, and vented through the flue to the outdoor environment. If you smell sulfur, see excessive condensation on windows, see soot or smoke stains around the furnace, you may have a leak.
  • Frequent Cycling – Heat Turns On and Off
    Short cycling is when the heat turns on and off repeatedly. This can be caused by a damaged fan limiter, a dirty flame sensor or damaged thermocouple. If you notice short cycling, call a local heating and cooling specialist.
  • Can I insert an image, video, or gif in my FAQ?
    Yes. To add media follow these steps: 1. Enter the app’s Settings 2. Click on the “Manage FAQs” button 3. Select the question you would like to add media to 4. When editing your answer click on the camera, video, or GIF icon 5. Add media from your library.
  • How do I add a new question & answer?
    To add a new FAQ follow these steps: 1. Click “Manage FAQs” button 2. From your site’s dashboard you can add, edit and manage all your questions and answers 3. Each question and answer should be added to a category 4. Save and publish.
  • How do I edit or remove the “FAQ” title?
    You can edit the title from the Settings tab in the app. If you don’t want to display the title, simply disable the Title under “Info to Display”.
  • Repair
    Just like any HVAC unit, regularly maintaining your duct system can prevent extensive damage and extend the unit’s life. However, problems happen and if you are having issues with your ducts, we can handle it! Our San Jose duct repairs are fast and reliable.
  • Installation
    Our HVAC technicians have the knowledge and experience to effectively install your new ducts. Whether you are installing a brand-new ductwork system or want to replace your old unit, we complete the job with care and precision.
  • Fabrication
    Ductwork fabrication consists of taking sheet metal and creating duct and duct fittings. Not a lot of HVAC technicians offer this service, relying on third party “tin knockers” to get the job done. However, our skilled San Jose duct experts take care of everything in house.
  • Design
    Ductwork is a vital for a comfortable home or office. But since no two buildings are the same, it is unreasonable to think the same duct system will work for different units. Our team takes the time to understand your ductwork needs and create customized designs.

Call (408) 375-6363 or click here to schedule your free in house estimate for new furnace installation or repair in the Bay Area.

bottom of page