I am in a bit of a pickle and I'm thinking its partially my own fault.
I have a house thats heated by a Utica Boilers hot water system (MGB 200HD) and was formerly controlled with a honeywell T87F. It was using what seemed like a lot of natural gas...to put it plainly, the bill was considerably higher than the 50 year old gas fired hot air system in my parents house, while the heat was only set at ~55ish degrees (I am not living there currently).
I replaced the old honeywell with a new one (RTH 2300B) and now the heat just won't come up. I can raise the heat to 70 or above on the thermostat, and the furnace comes on like it should but the temperature won't get anywhere close...63 seems to be the limit. When I took off the old thermostat I didn't pay attention to the wiring (stupid me) thinking it would be more straight forward in a home built in 1950 than my parents house which is twice as old. When I look at the old thermostat, I am only really seeing metallic connections for two wires, I presume the red and white. The third wire (green) *Might* have not been connected to anything, yet I have all 3 hooked up on the new thermostat. Any danger in trying just the two (red and white)? At the emergency shut off switch on the boiler I am only seeing two wires connected, a red and white with a third bare wire wrapped around the bundle. The boiler, btw, was installed by a professional several years ago. I am currently considering this a thermostat problem because the old one would raise the heat...it just cost a small fortune. I do still have the old one, but not remembering how it was connected...well, you get the idea.
Also, the 2nd floor is and was considerably colder than the 1st. The boiler is in the basement. I suspect I need to bleed the radiators: I did it once already and it made little difference, but at the same time the radiators already weren't getting much warmer. Never having had a hot water system before, do you usually need to bleed the radiators several times to get all the air out?
As you can see, I am new to all this, so please bear with my ignorance. Very much hoping you all can help me out or at least point me in the right direction. A professional is not in the cards at this moment.
Thanks for your time.