This will cause the fan to automatically turn on when the furnace is heating and shut off once the call for heat stops. If your fan limit switch was already set to AUTO not pressed in , then you most likely either have a problem with your thermostat wiring or the fan limit switch is bad. December 12, When your thermostat is set to AUTO, your furnace fan should blow only when your furnace is in the middle of a heating cycle.
Schedule Appointment Today. If the filter is dirty, it restricts airflow across the heat exchanger, which causes it to overheat! Your furnace might even start blowing cold air if this is the problem. The solution is simple: replace the furnace filter. We suggest replacing your filter every three months.
If you have pets, you should check it more often, about once a month. Pro tip: New Mexico Air Filter is a great place to purchase your furnace filter! They are local and affordable. Get started with a quote. Get a free quote. Authorized Carrier Dealer. Stay Connected Get the latest product arrivals, and news. Please send resume to: info proflohvac. OK Learn more. Cookie and Privacy Settings.
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Otherwise you will be prompted again when opening a new browser window or new a tab. Google Analytics Cookies. In fact, running your furnace fan constantly may even save you money since having more even temperatures in your home may result in the heat or air conditioner running less.
It is also worth noting that starting July 3, , high efficiency motors are required by HVAC manufacturers to comply with the U.
Providing that your unit and system was installed properly these fan systems were designed to run consistently. If you are unsure about whether your unit and fan system is up to the task, contact us today to schedule an appointment to evaluate your system or repair your furnace.
There are a few instances where if your furnace fan keeps running it is not a good idea.
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