Central Heating

[Russb45]

Dear Hard@it

Have checked all all your suggestions. Water in the tank is cold Ball valve is correct water level ok and pump rotation unknown how do i check this

[Hard@it]

You do not need to check rotation. Arrow is either on connections to pipr or on back of pump, just check that cold feed is connected to the outgoing pipe of the pump.

Take note of Pilotlight suggestion, but i would not drag heating water through your DHW. Empty heating systm and disconnect one of your cyl conn and if coil leaking from cyl then you should get water out of coil.

[Hard@it]

apologies, do not know what I was thinking about - re pilotlights' suggestion, do not do as I suggested do this.

1 Check if your ch tank is below water level of storage tanks

2 If it is then empty some water out of your ch tank, or syphon it out till it is empty.

3 if it refills then the coil in cylinder is passing your domestic hot water through to your ch.

Sorry for not thinking right. Hard@it

[markja]

mine used to do this occassionally.the problem is when water is cold it is one size. when it's heated it expands. the ammount of expansion was enough in my system to make it overflow. there was only a small drip-drip- drip. but each night the system would cool down, the water would contract back to it's original volume and a small amount of water would be let in by the ball **** to compensate. next morning it would start all over again. i ended up adjusting the water level in the header tank a lot lower than would appear neccessary. check when the system is hot the level of the water from the overflow. make sure you have corrosion inhibitor as well.