Hi, for all plumbers out there, I have taken off 2 radiators to decorate, can I still run the heating system for the rest of the radiators, I have gas heating with a combi boiler

As long as the heating system is in tact and the plumbing lines connected to those radiators are plugged, that should be no problem.

Hi Annmcf53

If you have a combi. boiler (forced-water system) then you must have drained or isolated the zone (or entire boiler?) associated with the radiators to remove them, right?

If you were able to isolate the zone with the radiators/zone enough to drain them then it should be OK to run the rest of the boiler system (the other zones) with no problem, short-term. As Questionair suggested, if this is expected to be a long-term issue, I would strongly suggest capping the radiator connections before starting the system up.

Mark