Hi all,
Having lurked here for a while and seen some of the geeat advice given on here thought I would try it out for myself.
My situation: Newly bought house with gas central heating using a Potterton Nettaheat gas boiler. Hot water works fine and central heating is good....but only if the HW is on. If the HW isn't on, no heating. The system has a single Honeywell V4043H motorized valve in the airing cupboard which I think might be the fault. It looks as if, at some stage, something has dripped on to it as the screw that holds the face plate on is rusted solid and there are obvious drip marks down the casing. The switch moves easily between "Open" and "Auto" whether the system is powered or not.
My question: Does this suggest to those with more knowledge that the valve needs replacing? regrettably it seems to be the older model of this valve type (without the dimple) so i guess I'll also need to drain the system to replace it.
Thanks in advance folks.
Having lurked here for a while and seen some of the geeat advice given on here thought I would try it out for myself.
My situation: Newly bought house with gas central heating using a Potterton Nettaheat gas boiler. Hot water works fine and central heating is good....but only if the HW is on. If the HW isn't on, no heating. The system has a single Honeywell V4043H motorized valve in the airing cupboard which I think might be the fault. It looks as if, at some stage, something has dripped on to it as the screw that holds the face plate on is rusted solid and there are obvious drip marks down the casing. The switch moves easily between "Open" and "Auto" whether the system is powered or not.
My question: Does this suggest to those with more knowledge that the valve needs replacing? regrettably it seems to be the older model of this valve type (without the dimple) so i guess I'll also need to drain the system to replace it.
Thanks in advance folks.
