We live in a tri level house in WI. The boiler heats via baseboard on the main and upper floors, but in the lower level the hot water pipes run through the floor itself, basically giving us a heated floor to warm up the lower. This winter, our lower is not really heating at all. Last year, it seemed intermittent. Some days it would come on, others not. The thermostat down in the lower, has no on/off switch...nothing. It's just a Honeywell that shows current temp and temp to set it at. Here is a pic of it:
Any ideas why the heat down in the lower will not even engage to turn on? My gut feeling is it is not the thermostat itself, and I'd rather save a trip to the store to attempt to buy the right thermostat then install it, or call in a the heating guy if it is something simple here that I am missing...any comments would be great!