grundfos

Hi all! I had a new Viessmann boiler installed in February this year, they preformed a full power flush etc according to the manufacturers instillation specification and the I staller was manufacturer approved. We've recently been using the boiler and it's making a whiring noise (kind of...

Hi - first time poster. We have a wood fired boiler stove that heats a tank of water and four radiators. (Charnwood country 8b) The grundfos pump is controlled by a thermostat on the HW tank - when the water in the tank is warm enough the pump sends water to the rads. The system works well but...

I have a Grundfos UPM3 Flex AS pump for my UFH system. The lights on it are as follows: LED 1: Flashing green maybe every second LED 2: off LED 3: Solid yellow LED 4: Solid yellow LED 5: off I understand the yellow LED's indicate the speed/performance setting it is set to and I can change this...

Hello to everyone, I have a problem with my Grundfos upm3 pump that does not stop running. Here is the description of the problem: I have two heating circles, upstairs and downstairs which is floor heating. The pump in the question services the floor heating. It is connected with Junkers...

Hi All, I am looking to change my Boiler (system) to a Combi Boiler. I have received a few different quotes and I don't want to take the water directly from the mains. I have no pressure in my showers as the tank is in the attic and the bathrooms are in the first floor. So I am between 2...

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...

We have 2 x circulating and 2 x shunt pumps (for redundancy - we live in an old council building). Please could you advise the best way to find out if a pump is rotating or not? Any of the four pumps running will vibrate the others, so vibration doesn't help. I tried this little compass device...

Hi, my central heating uses a Grundfos UPS 15-50 which is about 15 years old. Over the last few months it has started humming, it's not very loud but in the wee small hours of the morning it resonates through the pipework and wakes me up. The pump is mounted in the middle of a horizontal L...

I have a Danfoss DHP-AQ MAXI, when I switch off the boiler on the control panel, the Grundfos Circulation pump keeps running. It has it's own power switch so I can switch it off there, but can I get a replacement overrun thermostat and fit it myself for the Danfoss if that is the problem?

The pump in my system is behaving strangely. Normally it indicates that it is running at about 43W. Since Xmas morning, it has only been at about 18W. When it starts up, it goes up to 45 for a few seconds and then back down 3 or 4 times. Added to this, it worked perfectly for a time yesterday...

Hello all, I may have to get my central heating pump changed as it is making an almighty rattle all the time* but I am not sure which one to get. The pump I have currently got is labelled 'Grundfos Selectric 4', Type 4 -50/130 (please see pictures attached) and has 4 speed settings. Is there an...

Mea culpa; mea maxima culpa! Dropped a heavy chunk of metal on the water pipe feeding into the above pump (don't ask). Threads on black plastic end cap of said pump went snap! Need a new end cap - possibly also a new non-return valve wouldn't go amiss, since it's about 15 years old. Can't make...

Will a Grundfos UPS2 25-80 (180) head fit a UPS2 15 50/60 (130) body (backplate)? The bodies are of different port-to-port heights but the heads themselves look pretty similar.

Background I have a Grant Vortex 36E Oil fired boiler. Two Grundfos pumps inside; one for the rads & one for the hot water. The Problem The pump on the hot water circuit is making a howling noise when I run hot water. But not always. The hot water pump has, and as far as I know, always has been...

Hi - first post (be gentle) I have a condensing boiler heating system that runs through a Grundfos PumpPlan Dual Pump (http://www.gasapplianceguide.co.uk/pumpplan.htm). Unfortunately, the Wiring Centre that controls it has gone bang and I can't find another anywhere to swap over. The PumpPlan...

Let me first list the set-up we have: Vaillant ecoTec Plus 637 system boiler Zilmet unvented hot water cylinder with external expansion vessel 1 zone valve for Central Heating 1 zone valve for hot water cylinder 1 Grundfos 15-50/60 circulation pump (on flow pipe from boiler) 16 radiators...

Hi, I'm looking for some advice on a new Nest V3 Installation for hot water and heating control. I currently have a Y plan system with the following components: - Boiler - Ideal Classic FF350 in the utility room. - Programmer - Danfoss FP715 (below the boiler). - Danfoss - thermostat in the...

Hi All I was hoping to get some advice regarding my underfloor heating. Setup is as follows: 6 circuits connected using 1 6 port manifold Grundfos UPS 25-60 130 pump Polypipe mixing valve All controlled as a single zone, no actuators, wire thermostat Worcester boiler (with a pump inside it)...

I have a back boiler in lounge then in airing cupboard a water tank & time clock & pump, over night the heating didn't click off & when I turned it & hot water to off this morning the pump still runs & the water is very hot . I turned it off at plug a few times but it just starts up again I've...

Hi all, First time poster here, so sorry for any silly questions! Have a similar issue to the thread below: //www.diynot.com/diy/threads/grundfos-circulation-pump-wont-switch-off.415725/ However, I changed both of my actuators but here it seems I still see the problem, I had slack...