By combining immediate results with sustainable performance, we protect the value of your investment.  We provide skilled installation, maintenance, and repair of gas furnaces, heat pumps, dual fuel systems, boilers, air conditioners, air quality products, traditional and tankless water heaters, and advanced duct cleaning services.  Welzig Heating & Air is the right choice for  the comfort, safety, and health of homes or offices across Boulder, Longmont, Louisville, Lafayette, CO & more.
To be sure of correct sizing and a proper installation, choose a reputable contractor who will take the time to calculate your heating needs according to an industry standard such as in "Manual J HVAC Residential Load Calculation" of the Air Conditioning Contractors of America. Such calculations take into account the climate and the size, design, and construction of your house. Once the furnace is installed, maintain it regularly according to the manufacturer's recommendations. Our survey helped to confirm this advice. When we asked about the most common reasons for service calls for furnaces, contractors cited human error, inadequate maintenance, for example, or improper installation, twice as often as defective equipment. Read our frequency of repair report for which brands or the most and least reliable.
Hi This is my 1st summer owning this house. My electric bill has been doubling for 3 months in a row..I have a Carrier 25HPA6 Performance Series 2 Stage Heat Pump...I recently went online and found instructions on how to clean the outdoor unit. I did so and it was not very dirty. I also have a generator that kicks on when I lose power which does not support the AC unit..We did lose power for a few days recently. I have 2 faults showing on the heat pump unit..one being 53 outdoor air sensor not reading or out of range 255 events and F 37 control fault, heater stuck on 13 events.It is set to cool and the fan to auto. I have never had a heat pump or central Air and am very green to this.The previous owners left no manuals.I have found one online but for installation only. PLease help?

Thank you, thank you, thank you for sharing your knowledge. I just replaced our shower cartridge and our leak is FIXED!!!!!!! Your instructional was clear and concise. I did purchase 2 cartridges first, because I did not know the type it was and could not pull it out without the plastic cover it comes with. Fortunately, it was one of the two. By the way I'm a 63 year old woman. If I can do it, anyone with internet and a little patience and an hour can do it.....
Our technicians have experience repairing furnaces and will make sure your home is back to keeping your family cozy in no time. From training and certifications to our reputation for doing the job right time and time again, you can trust that James Heating & A/C, Inc’s furnace repair technicians will have your troubles taken care of and your furnace operating smoothly. Whether it’s emergency furnace repair or service you can schedule a little in advance, our team can give you peace of mind, knowing that your furnace is in good hands. Are you in need of a furnace repair? When performing a repair, it's important to hire professional HVAC contractors.
Since 1994, Welzig Heating & Air has been providing professional air quality solutions throughout Boulder, Longmont, Louisville, Lafayette, CO & more. We specialize in industry leading products and employ skilled and knowledgeable technicians to do the job right the first time. As a family owned company, we understand how important the quality of your indoor environment can be on your health, comfort, and productivity. When you call the team from Welzig Heating & Air, you’ll enjoy helpful recommendations, convenient appointment times, and rewarding installation service that leaves you feeling refreshed.
A pinging or popping sound coming from the duct work can come from thermal expansion—the ductwork expanding and contracting as it heats and cools.  Or, air blowing past a loose flap of metal can make the sound. Track along the duct runs, listening for the sound. If you locate it, make a small dent in the sheet metal to provide a more rigid surface that’s less likely to move as it heats and cools.

We are famous for being honest and committed with high quality and value to 100% customer satisfaction 7 days a week especially since furnace repair in Denver is popular. The company is generally proud to comment that “All our specialists are drug tested and background checked.” It is also rare and interesting to comment that the techs use shoe covers and floor mats to keep all homes the same way they found them. You won’t find an equal level of commitment that our technicians provide clients anywhere else.
Don has earned a lifetime customer! My wife and I moved into our fixer-upper house this summer and just when the weather turned we realized that the 8 year old Goodman furnace in our basement had rusted heat exchange pipes and was leaking carbon monoxide. (So much for the $400 I paid to an home inspector before we moved in...) Fortunately, the furnace had a warranty still active. Not so fortunately, Goodman was incompetent in getting us the replacement part. It took them a month to send it, and then it wasn't even the right part. Don went to bat for us and convinced Goodman to foot the bill for an entirely new furnace! He and another worker made time in their busy schedule during thanksgiving week to come out and get the unit installed. This is above and beyond service and I couldn't be happier.

Geothermal Heating and Cooling systems are unmatched in every way. This green alternative to temperature control is three times more efficient than conventional systems. Recognized by the US Environmental Protection Agency as the most environmentally-friendly option available today, installation of a geothermal HVAC system translates into a 50% reduction in heating costs, 30% reduction in cooling costs, and a 65% potential savings on hot water costs.  Sky Heating & Air Conditioning is now the largest WaterFurnace geothermal contractor west of Iowa. Our team of experienced professionals offer conscientious and skilled start-to-finish installation and service.  We specialize in outstanding geothermal HVAC systems, adding value and enjoyment to your home through sustainable solutions to year round temperature control. Contact Sky Heating & Air Conditioning for geothermal heat pump installation in Portland.


As a technical industry, the heating and cooling field is associated with annual advances. New energies make our industry an exciting place to work. Our team thrives on keeping up to date with all changes in the HVAC field. We are here to share our knowledge with each customer. When you are ready to update your HVAC system, we can help you select the ideal system for your home.
Inspect your furnace thermostat by first making sure that it’s turned on. Also, ensure that the thermostat switch is turned to “heat” and not “cool”. If your furnace will still not start with the thermostat on, try adjusting the temperature settings to a few degrees higher. Inspect any visible wires for breaks or splits, and make sure your thermostat batteries are not dead. Do not touch any open wires; contact a professional.
We install heating equipment from Lennox and can repair all major brands, including Carrier, Trane, York, Bryant, Rheem, and many more. We proudly offer same day service and next day installations. Dealing with a heating emergency? We've got you covered! Our team is prepared to assist you 24 hours a day, 7 days a week to ensure that your home remains comfortable and safe for you and your family members.

Environmental Protection Agency (EPA) has selected Sears Home Services as a 2018 ENERGY STAR Partner of the Year winner for Sustained Excellence — Retailer and Energy Management. This award is reserved for ENERGY STAR partners demonstrating outstanding leadership and exceptional commitment to the environment by providing consumers with products, services and information that help individuals make sustainable purchasing decisions.
Does your water heater make a loud or strange sound during operation? Are you sick and tired of unreasonably high energy bills? Are you out of hot water? Let us take a look at your water heater so that we can take care of any problems that may arise with its operation. Our water heater repair services in Federal Way, WA are thorough and comprehensive.
Has another company told you that your furnace has a cracked heat exchanger?  The heat exchanger is the heart of your furnace. Its failure can result in a dangerous situation for your home and the best solution is usually a new furnace.  Because of these issues, Bonney takes this situation very seriously.  We will offer you proof of the cracked heat exchanger in the form of a picture from our video inspection camera or a report from our exhaust gas analyzer, before we make our recommendation.
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