Intermittent pilot ignition-Uses a spark igniter to light the pilot flame, which then ignites the burners.The click is the spark caused by a spark igniter, which is used in 2 common ignition systems: Now, let’s talk about that clicking noise. The furnace blower comes on after a delay of a few minutes and starts distributing air throughout your home.Īs you can see, if there’s a malfunction at step 4, your furnace won’t open the gas valve, and the burners won’t light.The ignition system is energized for approximately a minute.
Otherwise, your furnace won’t start.īefore we get into more details, we need to say that this is an issue that an HVAC technician needs to handle. In other words, there’s an ignition system malfunction that needs to be fixed. Most likely, your furnace is making a clicking noise and not providing heat because your furnace’s spark igniter is trying to ignite your pilot light or burners but is failing to do so. We see several homeowners asking this question: “Why is my furnace making a clicking noise and not producing heat?”