I have just changed my circulator to a flowson domestic. This was due to the bolier gurgling and reaching saftey cut out regulary (Prima F60). The change seems to have improved the situation (no cutouts). However during the work I decided to do a flush and have been running the heating to circulate the chemical. I noticed that the rads were not getting hot all around the house. I have let the rads heat up individually and all ok there. It appears that either the new pump is not flowing very well or the diverter valve is not allowing the full flow of the new circulator. The new circulator seems very very quiet. Can a diverter valve be checked/cleaned. System is 10 large radiators and 1 small.
Cheers
Cheers