Product Information: The pump is usually located after the primary heat exchanger within your heating appliance and allows the heated water to be moved around within the closed heating system. In combi boilers , the pump is usually situated before the diverter valve to allow circulation through the DHW and central heating systems. The VAILLANT 178983 PUMP is a genuine, brand new Vaillant Boiler Spares product, covered by a Vaillant Boiler Spares manufacturer's guarantee. Total system solution available from one manufacturer – Intelligent controls and accessories available

Perhaps those yet to be convinced how critical casings are should take a look at the obsolete Netaheat boiler range...a boiler implicated in the deaths and CO poisoning of several individuals. Are there other parts on the PCB that would prevent correct operation of the boiler if it were to match the 5 wire pump setup?We are proud of the quality of our refurbished parts and they come with 12 months replacement warranty. Your receipt will be the proof of warranty and please keep them somewhere safe. If you have changed the old 3 wire Wilo pump for an updated Grundfos 5 wire pump without issue previously, that's the kind of info I'm after. As I said in another post, I would expect that having given the correct details and the fact the PCB has the correct plug for taking a 5 wire multiplug, it should work. But after carefully noting all parts I did touch during removal, ensuring I worked in reverse and didn't do anything to the electrics other than unplug the old pump from the board and plug the new one in, I'm stumped as to what might be preventing it from working. Nothing felt like it broke on the PCB when I unplugged the old pump, the new plug went in ok, there are no obvious signs of burnout on the circuits, I had no leaks, no leftover parts, all seals were replaced and all mating surfaces cleaned prior to new seals being fitted... I was honestly surprised at how well things went until that point of turning it on.

The cover on an Ecotec forms part of the safety system...it's correct fitment is essential to preserve the safety of the boiler....especially on a boiler that has a history of combustion related safety issues.Removable side panels and push-fit flue system – For improved accessibility, ease of installation and greater installation flexibility We are currently using Royal Mail Parcelforce and DPD as our delivery providers, all small items will be delivered by Royal Mail, these can take up to three working days to reach you. Compatible with aroTHERM air-to-water heat pump hybrid system – Making the perfect entry into renewable systems Not what you're looking for? Try our unique Spares Finder tool or you can view all Vaillant Boiler Spares products.