About Cold Craft

We pride ourselves in being proactive in the installation and service aspects of furnace and air conditioning.  These include safety, technical excellence, doing it right the first time and customer experience.

Residential Heating and Air Conditioning

Cold Craft, Inc. is a trusted residential cooling and heating contractor since 1991 in the South Bay. We are a BPI Certified contractor so we understand building performance and a Diamond Certified company so you know you will be treated right.


Cold Craft specializes in commercial heating, ventilation, air conditioning and refrigeration installation, diagnostic, maintenance and repair. We take pride in using highly experienced technicians and detailed inspection checklists.



Geothermal heating is a fairly involved process and an investment.  For more information about the process and a free estimate for those that qualify, please give us a call to learn more at (408) 374-7292. We are here to assist you.


We provide the following services:

  • Residential & Commercial Heating
  • Air Conditioning
  • Ventilation
  • Refrigeration Installation
  • Design Builds
  • Safety Inspections
  • Geothermal
  • Install, repair and maintenance for Wine Cellar refrigeration 
  • Diagnostic
  • Maintenance & Repair

Phone: (888)447-0071

Modern kitchen and living room



While the professionals recommend that a furnace be inspected and tuned up by a qualified heating contractor once every year, many homeowners often wonder if this is crucial maintenance.  Not only do furnace manufacturers recommend this annual inspection, but there is also verbiage in just about every warranty that states any damage to a unit caused by improper maintenance will not be covered by the warranty.

Yet, an annual tune-up can seem excessive to some, and it’s common for homeowners to think that they are perfectly capable of sticking a vacuum nozzle into the furnace to remove some dust every now and then.

Therefore, should you really be paying a professional to come check out your furnace on a yearly basis?  The answer is simple: yes.

There are many reasons why yearly maintenance is important to the life of your furnace.  Aside from protecting the warranty, having a professional inspect your system is not only 100% safer then attempting to do it yourself, but it also provides preventative maintenance.  Sometimes, a problem can be caught before your furnace quits working in the middle of the night.

Here are just a few generic services that a heating contractor might perform during a fur ace tune-up.  These can vary greatly from one company to the next, so being aware of specific services can not only keep you informed, but also benefit your unique situation.

Blockage.  The entire vent system should be checked for blockage and any possible leakage.  This may include the outside termination and the connections within the furnace.  Fresh air intake grills and louvers need to also be checked, as well as the drainage system.  The drainage system inspection should include hoses, as well as a thorough cleaning of the condensate drain and trap.  Water within the trap should also be replaced.

Corrosion.  Inspecting for corroded, pitted, or even cracked heat exchanger is truly the most important aspect of the tune up.  This is what can allow carbon monoxide (the silent, odorless, and tasteless killer) to cross over from the combustion side to the breathable air side of the system which can cause health issues or could even be fatal.  All wiring should also be checked for corrosion and damage, as well as the heat exchanger (which should also be examined for rust).

Blower.  First, the access door to be checked to verify that the seal is tight at the furnace. Next, the wheel should be checked for debris and cleaned if it’s needed.  Finally, an amp-draw test should be conducted on the motor.

Filters should always be checked during an inspection, however it’s crucial to note that this should be done much more frequently than just once a year.  Some contractors also regularly check static air pressure, gas pressure, and temperature rise.

Finally, be weary of special deals that seem too good to be true.  In the end, the lowest price more often than not becomes the highest price—it just might take some time to get there.

For a professional tune up, safety inspection, or diagnostic, Cold Craft Inc. is your local specialist and has been serving the Bay Area for over 20 years.  You can call them at 888-447-0071 or visit

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