On average, furnace repair costs $287 nationally, with some homeowners spending as little as $60 while others paying $900 for furnace maintenance. Repairs to an electric furnace can run you $300 or less, while gas furnace repairs can be more complex and range from $375 to $1,200, depending on the what needs service. Most homeowners spend between $131 and $453 to fix their furnace. Here is what you need to know, along with the various factors that could affect the price of your furnace repair.
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.

Before performing DIY furnace maintenance, Richard makes sure to switch off the electrical power and the fuel supply. The distinctive red power switchplate can usually be found at the top of the cellar stairs or near the burner itself, while the fuel shutoff valve is near the oil tank or on the incoming gas pipe. Note the location of both in case of a future leak or fire.
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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