If you've got a dirty flame sensor, your system won't be able to light the burners. The flame sensor won't "sense" the flame, so it will cut off as soon as it turns on.
The less often you clean the system, the more likely you are to cover your flame sensor in a thick layer of gunk. Dirty burners can make it hard for your furnace to operate properly. It might still work, just not very well. Too much gas Furnace manufacturers actually have specs for how much gas their equipment should burn.
Like when it's less than 20 degrees outside. And icy. And the wind is howling. When this happens over a long enough time period, two things can happen: You overpay for gas during the winter The furnace overheats, causing it to cycle on a limit switch We get calls when 2 happens - especially on really cold days when the furnace can't keep up.
Dead blower capacitor Have you ever seen your blower capacitor? It usually looks like a big battery. Either way, your heat won't turn on. Low refrigerant levels Heating your home with a heat pump? And we all know that heat strips can lead to exorbitant utility bills.
Not good. Dead starting components heat pump While we're on the subject of heat pumps, let's just acknowledge that all kinds of components can go bad for any number of reasons. Bad inducer draft motor Also known as a "draft inducer," this little motor exists to help clear the heat exchanger of leftover gas from a prior cycle and vent all gases produced during the furnace's combustion process. Speaking of heat exchangers… 7.
Cracked heat exchanger Ok, a cracked heat exchanger won't always lead to furnace failure - at least not right away. Still, we want to mention it here because: It can impact the efficiency of your system, which you might notice when it gets bad enough. Cracked heat exchangers are sometimes indicative of another problem that could cause your furnace to fail, like low airflow due to dirty components. It's a really dangerous problem to have. If you've got a cracked heat exchanger, you need to replace it.
It's your ductwork. Heat won't turn on? Give us a ring. If you've had a furnace fail in the past, you know what we're talking about. While modern commercial and residential heating systems are often highly sophisticated and reliable, they are bound to develop problems at some point. When these issues persist, they can threaten not only the comfort of your loved ones but their safety as well.
But what if your heater stopped working altogether in the middle of the winter, leaving your family in the cold? The great news is that there are ways to minimize the chances of your heater not kicking on. In this article, we look at five of the top reasons a heater can stop working, as well as how you can address the situation. Perhaps the top reason homeowners call HVAC technicians during the winter is lack of furnace maintenance.
Often, the issue is that the heating system is simply dirty. If your furnace has a dirty blower, the blower could cause equipment failure. In short, a dirty blower can cause the heat exchanger to fail.
Dirty air filters could also be the reason your heater stopped working. Such filters restrict the airflow and could even worsen existing issues with wrong duct sizing. Lack of regular tuning could also result in a dirty flame sensor. You can clear a clogged orifice with a piece of thin wire. Before doing this, turn off the gas to the furnace. Also shut off the switch or circuit breaker that controls power to the furnace.
Then, just poke the thin wire into the tiny orifice where the pilot flame normally burns to knock out any debris. Some pilot lights have a flame adjustment screw. HomeTips Pro Tip: By doing your own minor furnace repairs, you can save money and also get your home heated up much faster than if you had to schedule and wait for a repair person.
Your gas- or oil-burning furnace must receive fuel to work. With a gas-fired furnace, be sure the valve on the gas pipe is turned on the lug or handle should be in line with the gas pipe. With an oil furnace, check the fuel supply.
On an electronic-ignition furnace, turn down the thermostat or turn the power switch off and then on again to reset the ignition control module. This 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. If your furnace has a pilot light, look for the flame. Usually this involves first turning the gas valve to Off and waiting a couple of minutes.
Then you turn it to Pilot. Next, press and hold it down while you light the flame. Last, wait a minute or so, release it, and then turn it to On. Get Free Bids Now!
Thermostat malfunctions cause most heating system failures. Other causes include a tripped circuit breaker or blown fuse, or—in the case of combustion furnaces—a pilot light that has gone out.
Check both the main electrical panel and any secondary subpanels that supply power to the unit. If the circuit has blown or tripped, reset the circuit breaker by flipping it all the way off and then on again. Or replace the fuse.
While forced-air furnaces are reliable for the most part, it is possible that they can break down. To prevent your heater from not working in the future, a little motor maintenance prior to the cold winter season can go a long way. If you can, slide out the fan unit and clean the blades of the fan with a toothbrush. Use a brush attachment on your vacuum cleaner to vacuum it out. Next to the motor shaft, see if there are oil ports on the motor.
If so, add a couple drops of non-detergent motor oil into the ports. You may need to remove a cover plate to do so. This may sound like a no-brainer, but more often than not the thermostat is the problem. Programmable thermostats can be confusing and complicated.
It is also easy for the switch to accidentally get moved, most likely during cleaning. So, before you make any phone calls, take a minute to make sure everything is right with the thermostat. The thermostat should be set to a temperature that will kick on the furnace. After it is set to the right temperative, give it a minute for the fan and heat to kick on. If you do find a wire break, splice it back together and wrap it with electrical tape.
Maybe you need to replace the battery. Dirty and clogged filters are one of the primary causes of furnace problems and can cause high operating costs. The heat exchanger can overheat and shut off quickly when filters are clogged with dust and dirt.
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