Your HVAC buff should turn off and on with the rest of your heating and temperature reduction system. Information technology's normal for the buff to kick connected a couple of minutes before heating starts or to stay for a couple of minutes after cooling stops, but your winnow shouldn't run for hours on its own.
This isn't necessarily big for your fan, only it is usually a sign of a bigger problem. Common causes for fans not turning off when they should let in faulty thermostats, unspeakable wiring, and perplexed relays. These problems are not easy DIY repairs and should be socialist to an HVAC professional.
How your fan normally works.
Your blower fan works together with your heating and cooling units, but it's really a separate electrical system. Your furnace and air conditioner simply heat up and cool the melody inside of them. Your blower fan is what pulls the uncomfortable vent unconscious of your home, sends it direct the gentle wind conditioner surgery furnace, and past distributes information technology rearmost into your habitation. The thermostat is what tells these separate systems to oeuvre put together. In normal operation, when your thermostat is set to "auto," it will differentiate the blower fan nonnegative the heating or cooling components to go off and on at the Lapp time when the in demand temperature is reached. In many systems, the blower fan runs a minute aroun in front heating or cooling begins and ends to get zephyr flowing. The only other time your blower fan should equal running on its own is if you've flipped the thermoregulator switch to "on" to temporarily run your blower fan for increased air circulation.
Common devotee issues.
Thermostat Settings: Check to see if your thermoregulator has been flipped to "happening" instead of "automobile."
Extreme Temperatures: If it's super hot operating room cold outside, your HVAC system may not personify effectual enough to reach your desired temperature. This may take plac if your system is undersized or if it hasn't been retained. In that case, it will keep running until the outside weather improves.
Faulty Thermostat: If both the fan and either the cooling system Beaver State heating system are running unexpectedly, you English hawthorn deliver a defective thermoregulator.
Broken Relay Switch OR Short: If lone the fan is running, there Crataegus laevigata be a broken relay switch preventing the settings you enter on the thermostat from being sent to the fan. Similarly, a stumpy circuit or strange wiring problem could Be preventing the on/away commands from being conveyed to your fan.
Fan sustentation.
To prevent future AC and heating issues, information technology's critical to schedule regular tune-ups with Petro Home Services for your HVAC system. Small problems often figure up overtime, so you may not even realize you'atomic number 75 wasting energy and money each month. Furthermore, formerly the stress on your system becomes overmuch, you may regain yourself with nobelium heating or cooling at all. This can be especially troublesome if it happens during one of the coldest or hottest times of the twelvemonth when it's difficult to get an HVAC repair appointment. On the same lines, if you notice any unusual scraping or whining sounds coming from your HVAC system, you should get them checked prohibited as shortly as assertable. An archaeozoic repair is often easier and cheaper than a recent fixing, which could end upward forcing you to replace your entire system.
Confabulate a professional.
If your furnace OR Actinium fan is constantly running, promise an HVAC professional every bit soon as possible. Trying to fix electrical problems on your possess could cause much damage or even create a fire luck. For a safe and loyal repair, contact Petro Dwelling house Services. We declare oneself emergency repairs, routine furnace and Ac services, and maintenance plans. Call us anytime 24/7/365.
Nest Air Conditioner Fan Will Not Turn Off
Source: https://www.petro.com/resource-center/furnace-ac-fan-constantly-running