If your furnace’s motor runs but the blower doesn’t move air, the belt that connects the two probably has broken. Replacing it is an easy fix. First, turn off all power to the unit and turn off the gas at the gas valve that serves the furnace. Remove the door on the front of the furnace cabinet to give you access to the blower (it might be on a slide-out drawer.) Check the number stamped on the belt and get an exact replacement from a home center or heating supply outlet.

Next check and clean the furnace’s flame sensor. The video below shows you how—note that this guy fixes it in about 5 minutes. We would probably use a little bit of emory paper, but he cleans the sensor with a 5-dollar bill. Another video further down the page under the discussion of “If your furnace keeps shutting off after about 5 minutes” shows the same project with a different brand of furnace.

Seattle furnaces can run nine months of the year. Based on the average temperatures in our area, if you compared running your furnace to a car it would get the equivalent of 1.8 million miles over its expected lifespan of 15 years. Your heating system will work hard for you, but like your car, doing routine and regular maintenance will keep it running smoothly, avoid problems, and keep your warranty intact.
Ultimately, the cost to repair your furnace depends on a wide range of variables. From the brand of the units to the damaged or broken parts, you need a reliable and trusted professional who can evaluate the issue and recommend next steps. If you're unsure whether to repair or replace your furnace, or even where to begin, connect with a local furnace repair professional who can make sure that your home heats well both now and in the future.
With more than 100 years in the industry, Lennox has continuously provided industry-leading innovation and technology while preserving strict durability and reliability standards. The specialists at House of Heating Incorporated help bring those standards to Marshfield so that you can always maintain total home comfort. If you’re in the market for a new HVAC system or even if you just have a question about what we can provide, give us a ring at 888-384-3163 or set up an appointment with us online. We’d love to hear from you. 

While there's nothing you can do to guarantee your air conditioner or furnace will never need repairs, there are ways to take better care of your system. Changing out the air filters every 3-6 months, making sure nothing is obstructing or interfering with the outside unit, and keeping all vents unblocked in well-used rooms will help keep your air conditioning and heating system operating efficiently.


When a furnace maintenance is performed a combustion analysis should be performed to identify any problems that couldn't be found by a visual inspection. You want to know what the Carbon monoxide level your furnace is producing as well as the oxygen/CO2 levels and stack temperate. The analyzer will also give you a calculated efficiency rating with the information the analyzer receives. You should have >100ppm of Carbon monoxide output during normal operation of your gas furnace. When you have higher numbers or CO numbers increasing during operation their is a problem with the furnace the technician should then find the cause of. This is just a brief explanation I'm trying to get across to those who get their furnace maintained and to those who don't! Check to see if anyone in the company has a NCI certification for carbon monoxide/combustion analysis.

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