Hello everyone. My wife and I bought our home in July 2014. It has a DC90 Ultra High Efficiency furnace and a heat pump/exchange system. I'm pretty sure it's from the early 90's. It's beige in colour. Shortly after moving in we replaced the original thermostat with a NEST unit. This evening I noticed that the home was starting to feel cold (north of Toronto, Ontario Canada).

I checked the NEST and it showed that the start-up of the furnace to return the home temp to the set temperature was 'delayed' by 3 minutes. There was a message on the screen that said the 'boiler' was shutting off frequently during the heating cycle. Internet Explorer Java Plug In 1.6.0_11 here.