HSIs are made of very brittle materials that will readily break. In fact, if you bring your index finger and thumb together quickly enough, the force would be enough to shatter the carbide tip of a hot surface igniter. And if the ignitor stays on for an extended period, this will make the ignitor more brittle. Need top-quality products and service? Pioneers Heating and Air provides a wide range of heating, ventilation and air conditioning services whether residential or small commercial business. We are here for you 24 hours a day, 365 days a year! Ring us today at (626) 217-0559 for a free estimate!