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Hi guys hoping for some advice from the experts before I call someone in. S-plan system, has been working ok for a few years. Grundfos UPS2 Pump gets power via the boiler (Vaillant EcoTec+ 418... about 6 years old). The problem: twice now, the pump got stuck on running continuously. It's not...

Hi I'm wondering if someone could advise what my options are. 1930s detached house, solid brick walls, lime mortar and roughcast (or pebble-dash?) render. We have some damp internal patches in various places. Previous owners had it painted outside with non-breathable paint. In some areas, the...

Just in case anyone has some ideas to point me in the right direction! The system: Vaillant EcoTec 418 system boiler with unvented tank. S-plan (2 zone, CH and HW). Grundfos 3-speed pump (set to 2). Recently added smart valves (Drayton Wiser) to 5 out of 9 rads, so boiler load is reduced (all...

Hi I have a cpl of question, but I'm also posting as this might help others trying to get Drayton Wiser to work properly with Vaillant (or other boilers). Setup: ecotec plus 418, S plan, installing Drayton Wiser smart controls (currently 3 rad valves). Problem: the boiler is short-cycling...

Hi all quick question.... My system: Vaillant EcoTech 418, S-Plan system, 2 zones (HW unvented cylinder + CH). There is a short loop with auto bypass valve. System works fine but I am attempting to upgrade to smart controls (Drayton Wiser). The new controls seem to operate via short bursts of...

Hi My setup: S plan, Unvented cylinder, Vaillant EcoTec 418 (all works fine). The boiler has 2 knobs to set the flow temperature (for heating and water), but one of them seems to do nothing. i.e. the flow temperature target is what I set for the central heating independently of what the system...

Hi I'm a newbie looking for some advice. My Setup: Vaillant 418 Ecotec, S plan system. Salus RT500RF receiver+stat and wired controller. I'm switching to smart controls (Drayton wiser). I replaced the wired controller and It's all working as long as the old RF stat is calling for heat, but I...

Hi Great forum btw! I have a Vaillant EcoTech 418, S-Plan system, 2 zones (HW unvented cylinder + CH), installed 1 year ago. Standard 3 speed Grundfos pump. The system seems to work, but boiler periodically (say once a month) cuts out with error F72... "Flow and/or return NTC fault". I've now...