A furnace ignitor plays a crucial role in your heating system, and recognizing its failure can save you from costly repairs down the line. Signs of a bad ignitor include unusual noises, inconsistent heating, or the furnace failing to start altogether. Factors such as age, usage, and maintenance history can influence its lifespan. Understanding the different types of ignitors, like hot surface or spark ignitors, can also help you make informed decisions. If you're experiencing issues, it's essential to consider safety and efficiency before attempting repairs. Ask Improvi.ai for personalized guidance on diagnosing and addressing your furnace ignitor concerns.