Furnace is running, but no heat is blowing into our house. It smells like a candle that has just been put out. The vent pipe that goes to the chimney is hot to the touch. What do I need to do? Ok, this started this morning. It seemed cold in the house, turned up the furnace and it didn't make any heat or air flow. After about 30 minutes it started to work. After being at work I came home to that smell. The furnace was running but blew no heat until five minutes ago, heat blowing. Thermostat says its 68, smell still noticeable. I changed the filter this morning. Is my furnace breaking down?

Your fan motor is burned out. The fan behind the furnace is not working