Recent content by 30kw

Sounds like expansion tank not pressurised with air or the diaphragm gone. Drain the entire system and check expansion charge with a foot pump, it should be at 1 bar, if not pump up to 0.5-1bar, refill system pressure to 1 bar. If any signs of water at schredder valve then suspect a new...

The water pressure of 0.7 baris not effected by it and increasing wouldnt do anything. the expansion tank is there to cater for expansion within the system as the boiler heats up. Check the flow rates with the manufacturers and test with a weir gauge, any less than stated could be due to mains...

Dependant on the system, pump speed isn't a matter, i expect its a grundfoss/myson pump installed, on setting 3, putting on number 2 may stop pumping over initially but wont rid the problem, extending open vent can help too, its hard without seeing the installation really and making a valid...

2 things, the diverter valve has stuck on the microswitch which will give power down the orange wire, can be checked by a multimeter. Is the boiler firing up and the pump? without demand from the clock and they are then it suggests a diverter valve problem. Did you attend the valve prior to...

Your system is pumping over and drawing in air causing corrosion and sludge problems, may be due to a number of things. These include pump location, open vent and cold feed location. Ideally on a fully pump system the flow from the boiler should go to a closed couple cold feed and open vent...

It sounds as though there may be leak on the toilet system, if it is a wall mounted cistern check under it where the cold feed connection is, water may have got into your floorboards via this or by the overflow connection lose, dont try to tighten any plastic unions however, check all joints and...

This sounds like the synchron motor seized or sticking, if the valve has a manual lever, then push it to manually open, do this with the system off, it should lock open, however this is a temp measure and you should look at getting the motor changed. Regards