Gas Baseboard boiler. Why had it?!? Okay read carefully. When I first bought the house I notice that...

Okay read carefully. When I first bought the house I notice that the house used baseboard heating...no biggy. But what be akward was that at hand were two thermostats. One to control bedroom temps, and one for living quarter temps.
After yesterdays snow storm I come home to find only one even being heated, the bottom level(living querter thermo.) The thermo upstairs shows that the temp is 19*C.
Oh, btw I installed two electronic carafe instead of the originals, they be working fine till this problem.
Why is this happening?!
Answers:    When you speak electronic thermos, is that one and the same as programmable ones?. If the problem started right after you replaced them then I would read out that ther is the problem. Make sure the control inside is set on gas burner. You can check the system by shorting out the two wires. If you get bake again in that zone after the problen is in the thermostat or nouns. You can also open the zone stopcock manually by lifting the small arm on the valve to uncap it. Now turn the other thermostat to high and see if the hot hose down flows to all baseboards. Dont verbs about initial the valve, this singular makes the system a single zone. Kind of firm to fix the problem without in truth being within. It would probably take more or less 2 minutes to diagnose it.
sounds like a zone stopcock died, call a service tech to check it out. its too frozen to properly diagnose a problem on here because ya dont get adjectives the necessary info