Why does my gas furnace fan keep running?
The fan control should be set to AUTO. You can try turning the switch to OFF too. Other snafus such as a shorted thermostat wire can also cause the A/C or warm air furnace fan to run continuously. at THERMOSTAT WON’T TURN OFF.
Should the fan on my furnace be running constantly?
Running your furnace fan all the time isn’t exactly a bad thing. In fact, there’s no need to worry about the fan wearing out or breaking down because it’s designed to run continuously, and there’s an array of benefits connected to this. Here are some of them: Better circulation of heated and cooled air.
Is it bad for a fan to run constantly?
Keeping the fan on creates a more even distribution of heating and cooling, circulating the air if you have cold or hot spots in your house, like a bedroom above a garage. Less frequent starts and stops of the fan can reduce the stress from startup, and potentially help extend it’s lifespan.
Why does my furnace fan not shut off?
If your furnace fan won’t turn off, you most likely have one of these 3 problems: Your furnace fan limit switch is set to “manual override” The fan limit switch is faulty and needs to be replaced. There’s a problem in your thermostat wiring.
Why won’t my furnace shut off?
Check Your Thermostat If your furnace wont shut off and you’re worried, don’t panic. The first thing to do is check the thermostat. Check whether your fan is set to On or Auto. If it’s On, try setting it to Auto — this will turn the fan off when the temperature reaches the desired setting.
How much does it cost to run furnace fan all the time?
Therefore, the fan uses about 360 kWh per month in the ON mode. The average kWh in the US costs about $0.12 so it costs about $43 per month, or about $520 per year, to run a fan continuously.
Why is my fan running when my thermostat is off?
Over time, relay switches can become stuck or damaged, preventing the thermostat from communicating with the fan. Essentially, this means that the fan isn’t receiving the commands you’re relaying to the thermostat. So even if you turn your AC off, the fan will continue to run.
What do you do when your furnace keeps running?
What you can do if your furnace won’t stop running:
- Check the thermostat setting.
- Inspect the air filter.
- Look into weatherizing.
- Check your ductwork.
- Check the vents.
- Check the thermostat.
- When you need heating equipment installation, maintenance and repairs, trust P.
Why is my furnace blowing air when off?
Your furnace may be blowing cold air because the filter is too dirty. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. When overheating, your furnace can trip a high limit switch, causing the furnace burners to shut off so that the heat exchanger does not crack.
Is it better to leave furnace fan on or auto?
Keeping your fan on AUTO is the most energy-efficient option. The fan only runs when the system is on and not continuously. There is better dehumidification in your home during the summer months. When your fan is set to AUTO, moisture from cold cooling coils can drip and be drained outside.
Is it cheaper to run furnace fan all the time?
Running a fan throughout the day is inexpensive—much lower than the cost of running an AC unit alone—and using both in conjunction with each other means that you won’t have to keep your air conditioning running all day.
How often should I Run my Furnace Fan?
If you have a two stage high efficiency furnace the fan will tend to run more often so you may want to change it January first and again in Mid March. If you have central air conditioning, then it’s a good idea to check the filter monthly in the summer to make sure it is clean. Changing every 2-3 months is usually sufficient.
Why does my Furnace Fan keep running?
Why Does My Furnace Fan Keep Running? Your furnace fan limit switch is set to “manual override” The fan limit switch is faulty and needs to be replaced There’s a problem in your thermostat wiring. Unfortunately, you’ll need a professional to fix those last 2 problems.
Should I keep the Furnace Fan on all the time?
Running your home’s furnace fan all the time is not a bad thing. You won’t have to worry about the fan wearing out or breaking. It’s actually designed to run continuously. Running the fan will provide for better air circulation throughout the entire home, which can be especially beneficial for larger houses.
What causes a furnace to run continuously?
Dirty furnace filters are one of the biggest causes for a furnace to continuously run or “short cycle”. The dirty filter restricts airflow across the heat exchanger which causes it to get too hot! The furnace goes into cool down mode and will run the fan continuously and will cause your furnace to blow cold air.