Regarding your post, Every technician performs a maintenance differently. Today's modern furnaces really don't require as much maintenance as older style systems did. For instance: Older furnaces had drive belts, pulleys and motors with oil ports.Today's blowers are direct drive no belts, no pulleys, sealed bearing motors no oiling required. All of the new modern technology cuts the maintenance time in half if not more. Today's equipment has multiple safety's in place so that in case of a failure the system will shut down. non serviceable control boards or (Brains) monitor system functions. Unlike oil systems, the maintenance on a gas system can possibly be completed in less than half the time. I'd say 20 to 30 minutes is about right unless a service issue arises. In the 30 minute time span, the doors can be removed, system components can be visually inspected, the flame can be inspected and co test can be performed for spillage and vacuum of the combustion area can be performed if needed. The air filter should be checked and the humidifier can be activated. Remember that probing into a perfectly functioning system can be detrimental to its lifespan. My advice is change you air filter, keep the area around the equipment free of dust and try not to store in close proximity to the heating plant. Be sure you have an updated quality carbon monoxide detector in your home. Regarding the crack in your heat ex-changer, If the heat ex-changer had a crack in it, the system it should have been shut down right then and there. Be aware that Carbon monoxide may be entering your living space due to that crack. Have a knowledgeable company come back and do a CO test in your home at the supply vents and use a scope to check your heat ex-changer for cracks. I hope this helps you. Bottom line, you have to trust the company that you are using. If you feel uncertain about their capabilities, then more than likely, you instinct is correct. Good Luck to you.. Happy Holidays
When it comes to furnace repair, Roswell and area residents can rely on us for fast and efficient repairs. Moncrief has continued to be a consistent provider of heating and cooling services in the Roswell and Marietta. We have worked hard to gain your respect by providing quality services and products, and delivering on our promise of total comfort for your home and family while providing energy and cost savings.
You might guess it from the name: the heat exchanger is the part of your furnace that actually heats the air your blower motor pushes through the furnace. It consists of a chamber in which the heat energy produced by natural or propane gas is transferred to the forced air. At the same time, this part also includes a vent through which the gases themselves are safely removed from the unit and the air that enters your home. Because of these gases, a problem with your heat exchanger needs to be dealt with promptly. Over time, cracks in the exchanger can result in carbon monoxide leaks. Taking care of the problem once again means understanding the existence of a range: repairing your heat exchanger can cost as little as $100, but a full replacement may cost up to $1,200.
Moncrief provides a wide range of services from high-quality energy-efficient systems, tune-ups and inspections, as well as repairs in the Roswell and Marietta areas. As a full-service heating and cooling company, we stay up-to-date on the most economical and energy-efficient systems available for your home or business. In addition, our technicians are well-trained in a wide range of systems to provide quality and cost-efficient furnace service, repairs and installation.

Another energy savings tip, HVAC professionals say, is using a programmable thermostat. A programmable thermostat can save you up to 10 percent on energy bills, if you dial it down seven or eight degrees from the normal temperature setting — the U.S. Department of Energy recommends a setting of 68 degrees — for eight hours a day, whether it's during the work day or at night, according to DOE.
Start with your utility company; they can help a great deal. Comparing previous bills isn't always a good measure, as the weather is never exactly the same month to month. Instead, if you take your energy bill and divide it by the square footage of livable space in your home, don't count areas like unfinished garages or basements -- you can calculate how much you are spending to heat or cool each square foot of your home. Your energy provider can tell you what the average cost per square foot is in your region for that same period of time so you can compare apples to apples.
At Bob’s Heating & Air Conditioning, we believe that our customers deserve to live comfortably throughout the entire year. That is why we offer such a comprehensive selection of air conditioning, heating and water heater services in Kirkland, WA. When you work with us, you can rest assured that your furnace is installed properly, your AC maintenance is meticulous, and that your water heater repairs are top notch. Contact us today to learn more about the heating and cooling services we offer throughout Kirkland, WA.

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