At Welzig Heating & Air, we focus on quality.  Recognizing that a cut corner today results in long-term problems and expense, we adhere to strict procedures for service and installation, and recommend only premier products.  While we provide affordable solutions to indoor comfort, we refuse to compromise integrity with subpar equipment, materials, or workmanship.  If you’re looking for residential or commercial heating, cooling, air quality, or water heating services of a higher caliber, Welzig Heating & Air delivers satisfaction across Boulder, CO & Surrounding Areas.  Contact us at 303-678-5576 anytime you need us.  Our dedicated technicians are on-call, ready to handle any challenge, 24 hours a day, 365 days a year.
The flame sensor safeguards your furnace against the unsafe burning of fuel, and a dirty flame sensor may cause your furnace to function improperly. Typically, the flame sensor comes in the form of a rod that can be found near the back of the furnace, right in the path of the burner. To clean the sensor, turn off power to the furnace at the breaker box. Then, if possible, remove the sensor from the furnace. Scrub the sensor gently to remove dust and other residues. Finally, reattach the sensor and resume power to the furnace.
High-efficiency condensing furnaces (90% AFUE and above) are a bit more complex than conventional furnaces. The main differences between a conventional and condensing furnace is the heat exchanger technology used to extract heat from the combustion process and the method used to exhaust the combustion gases. In these ways, the furnaces are very different. The condensing furnace does not have a significantly more efficient combustion process than does a conventional furnace; both use gas burners with electronic ignition. The difference lies in that the condensing furnace has a more efficient heat extraction process after combustion.
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