Initial cost is only one of the drawbacks of that strategy. Partly to avoid that possibility, the furnaces in most homes are larger than necessary. A furnace that’s too small won’t keep your house comfortable during extremely cold weather. The furnace’s specifications should fit your needs. More than 500 specialists in residential heating and air conditioning told us about their experiences installing and maintaining heating equipment. If you tried the solutions provided above and your Lennox furnace is still not turning on, or if it’s your first time attempting to fix a problem on a home heating system, it advisable to call a professional.How do most people go about buying a furnace? First, they call contractors and ask for estimates. The problem could be a result of wrong thermostat settings, a clogged filter, a blocked condensate drain, a dirty ignition sensor or the unit doesn’t have any power. Try to identify what caused the surge and address it.Ī furnace that won’t turn on is the last thing you want on a cold winter night. Check if you have blown fuses, too, as this could mean you had a power surge.If this doesn’t work, check the circuit breaker to see if the furnace circuit has tripped.Some models may take several minutes to start up. Turn the switch back on and wait for your system to respond.While this switch will likely be located on the nearby wall, it’s easy for someone unfamiliar with your home to accidentally turn it off, thinking it’s a light switch. Sometimes, a furnace won’t kick on because the power switch is turned off. One way to determine whether a dirty filter is why your Lennox furnace isn’t turning on is by listening for whistling sounds. If you haven’t replaced or cleaned your furnace filter for a while, dust and other objects may be clogging it up, preventing air from passing through. It also prevents contaminants from being recirculated, which helps keep your inside air clean. The furnace filter’s work keeps dust, hair, and other dirt particles that the return duct pulls in from reaching the blower fan. If no continuity is displayed, replace your thermostat. To find out if the thermostat is faulty, test it for continuity with a multimeter.A tripped circuit could sign a power surge try to find out what’s causing the surge. If getting new batteries doesn’t work, check the circuit breaker to see if the thermostat circuit has tripped.If your thermostat is battery operated, try replacing the batteries. If this doesn’t help, check the thermostat’s power supply.Raise the thermostat temperature about 10° F higher than what is currently indicated on the device to see if the furnace turns on.Check to see if your thermostat is set to ‘heat.’.Dead batteries could also be the problem, or the thermostat may be faulty. If the room’s warmth starts to drop, the thermostat turns the furnace on to raise the temperature to the set point.Ī wrongly set thermostat could be the reason for a Lennox furnace not turning on. When you set your thermostat to a given temperature, the furnace will always work to keep your room at this desired temperature.
The thermostat is the central control point of your heating system it regulates how much heat the furnace gives out and when. So, let’s get started! Check the Thermostat’s Settings These quick fixes could be just what’s needed to get your furnace up and running again.
Working with an HVAC technician can help you quickly address the problem, but before involving one, consider giving the following troubleshooting steps a shot. Ensure the power switch is turned on, too, as the furnace might not be getting enough power. If your Lennox furnace doesn’t turn on, check to see the thermostat settings aren’t changed, the filter isn’t clogged with dirt, the condensate drain isn’t blocked, and the ignition sensor isn’t dirty. A common problem is a failure to come on, which could cause your house to get not only cold but also potentially freeze your water pipes, resulting in costly repairs. But as with any home heating system, they too experience breakdowns, requiring constant care and maintenance. Lennox furnaces have been a vital winter appliance for many years, providing homeowners with reliable and convenient heating systems. We may also earn commissions if you purchase products from other retailers after clicking on a link from our site. As an Amazon Associate we earn from qualifying purchases. Temperature Master is an Amazon Associate.
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