Had no heat yesterday evening till this morning. Texted with TDH Mechanical first thing in the morning and within 2 hours Kris from TDH is at my door. He helped diagnose the issue and recommended to go with a new furnace as mine is 25 years old now. He provided me the different options and estimates for them and let me make the decision. He was not selling me anything, but provided me with facts and why the heat would stop in between.