I have steam heat in a house that I just moved into and several years ago hot water baseboard heating was installed in an addition to the house. I wanted to update the thermostats with programmable ones. The baseboard heating thermostat went well but the steam heat thermostat didn't. It appears that it works backwards. An open circuit will turn on the steam heat and a closed circuit turns off the steam heat. It had an old chrotherm thermostat in it. Any ideas of what I can do to install a programable thermostat.