Our circa 1903 house has hot water heat and radiators.
We’ve lived in it for 34 years and the only time we’ve had to flush the system is when we’ve had work done on the boiler unit. There are not many things to go wrong with a boiler outside of it springing a leak or the thermocouple going bad.
To properly flush the system, the valves on the baseboard radiators will need to be open to get the system to drain.
Have you tried bleeding each radiator when the system is on? There could be an air pocket or two that is preventing the system from filling properly.
If you have an automatic refill valve, it could be stuck in the closed position and there is not enough water in the system to fill the radiators. We replaced our existing coal-converted-to-gas boiler in 1982, and the automatic refill valve froze last year on the ~new~unit and had to be replaced.
Just some things for you to check.
LSAggie (posting on hubby’s account)
Thanks for the info. I think I’m going to just bite the bullet and let someone come in and take care of it. The more I look at this system the more nervous I am about messing with it.
Have a great thanksgiving!