You never know if this thing is going to fire up or not! A few days after installation, there was no heat. The service tech said it was a factory defect; the igniter had a cracked insulator so it was arcing against itself. Replaced it under warranty. A few weeks into its second winter, no heat. The service tech said it was all "carboned up" and needed to be cleaned. He charged $300, which was later refunded because it was under warranty. It's now the start of its third heating season, and no heat. Two nights ago, at about 3 A.M., we were freezing, so I went downstairs. The circulating pump was running but there was no flame. Just for fun I shut off the main power supply, waited about 30 seconds, turned it back on, and it ignited. I thought it might be just a glitch, so I didn't call emergency service. It was fine for a week. I just got back from the basement to turn it off and back on, which worked again. I don't know what's wrong this time. It'll take a week to get a serviceman here and I'm not paying for an after-hours service call. I've owned 4 homes and have never had furnace problems before, both boilers and forced-air furnaces. This is my first and last Lochinvar! P.S. When checking the drop-down for the model number, mine wasn't listed (CBN090). It was probably discontinued. Lucky me! "Follow-up review from 12/9/14" Well, the service tech just left. (fourth visit in three heating seasons) We are at the start of only its third heating season, and it just cost me $600 to have an ignition module replaced and have the heat exchanger cleaned of carbon build-up. I have to shell out all this cash to replace something that was probably defective from day one. I'm about ready to take a $4,000 loss and get a real furnace from a more well- known manufacturer.