I just bought a house with a central boiler and circulating pump that provides hot water to hydronic heaters with blowers to each room. Each room has a MD26 thermostat which controls the circulator pump and blower. The circulator pump turning on will call for heat from the boiler. All the thermostats join to a TACO SR501 switching relay that is then wired to the circulator and the boiler. The issue is that the thermostats are unable to properly regulate temperature because the blower and circulator seem to operate separately. When the dial is turned right a relay clicks and the blower turns on, however the circulating pump will not come on until the dial is turned further right and there is a second relay click. The way I would like the heating to function is that the blower and the circulator will kick on at the same time instead of having to turn the dial until there are two clicks. With the way the thermostats currently function, the blower will never turn off even though the circulator pump stops and the hydronic heaters go cold, eventually blowing cold air in the room.
Will installing a newer smart 120v thermostat such as Mysa or Sinope in each room solve this issue and kick on and off the circulator and blower at the same time?