My Netaheat boiler seems to not be heating the radiators anymore.
It was going fine until about three weeks ago when I had my bathroom radiator replaced with a towel rail. Then over the next few days anytime the heating came on I could hear water being pumped around the radiators (never noticed this before), I'm guessing this is because the new towel rail introduced air into the system. Anyway I turned off the heating for the next week or so as we had good weather, and now i have it come on in the morning. Heats the water but not the rads.
I've got a switchmaster 805 controller for it and i've set it to heating constant and water constant and it doesn't get the rads heating. Also turned the thermostat up to 25 degrees and above just to check if its that, with no luck. Any ideas?