Your furnace is a complex piece of equipment. HVAC technicians train for years to know how to troubleshoot one. In this episode, though, we’re breaking it down for you. We’ll go over your furnace’s ignition system from start to finish. Then we’ll discuss how knowing the process can help you.The first thing that happens when your system starts is that thermostat calls for heat. That signal reaches the furnace and tells it to turn on. The power kicks on and your inducer motor will start. It pulls air into the unit to make sure the pressures are right and the air-to-gas ratio is correct.Once your inducer motor is running, your igniter will get ready to start. A glow surface igniter will start to warm up right now, and a spark igniter will be ready for the gas to arrive. After that, the gas valve opens up and the gas ignites. The flames light until they reach the flame sensor.
As long as everything works right, the blower motor will turn on after 30 seconds to a minute. That way the air can warm up a bit before flowing into the house. When it does start, you should have warm and comfortable air flowing through your home.We go over each of the steps in more detail in the video. Now that you know what’s supposed to happen, you don’t have to wait until you’ve spent a week in the cold. You can know it’s not working as soon as it fails, so you can have it looked at sooner. In that case, Any Hour Services would be happy to help. One of our certified HVAC technicians can help your furnace get up and running the way it should. You can give us a call or schedule an appointment.
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