Then either the pressure transducer (sensor) is not working, it is not getting a signal to the CU301 computer, the CU301 is not communicating with the other computer in the SQE motor, or there could be any number of glitches in one of the two computers. Page 1 of 2 1 2 Next > Mad Robin New Member. Is this a problem with the Grundfos pump? They are extremely easy to adjust. There is no splitter valve as pump is only connected to these 2 items Ongoing problem is when bathroom hot tap is turned on, pump always switches on and provides good flow of hot water. there will be an arrow cast into the side of the pump at the pipes end. Moved into new house (its only 10 years old) with a sealed heating system. Answer: The suction line may be leaky, or there is air in the water. Do not start the pump unless it has been filled with water, or primed. Discussion in 'Plumbers' Talk' started by Mad Robin, Aug 17, 2010. It is set to 3.6 Bar with a 2 Bar differential and all other settings are auto/as it came. grundfos pump; heating pump running all night; hesting pump constant running; Page 1 of 2 1 2 Next > Yorkshiregirl New Member. The pre-pressure must be 1.7 - 1.7 bar. However, it has even more electronics, sensors, etc., than the MQ, and so far are not … share | improve this question | follow | asked Feb 28 '16 at 4:10. : Hello John just read your reply 5/12/2008 to a question posted in 2007 regarding a grundfos 3-45 pump which keeps turning on and off when water is demanded, did your suggestion of turnig off the auto restart do the trick? Good lck. Hi guys Do we have any shower pump experts? For the last few months the pump has faild to turn when called for but turning the shower off and on a few times will normally make it work but not today, it just wont pump. I ended up just turning all of the radiators off and then forgot about it. Newer pumps (such as the Grundfos 15/60) will have speed and flow settings. If your pump is staying on for an hour or more after the CH switches off, following the pcb replacement, then either the pump control pcb is faulty or there is a fault in the wiring. there will be an arrow cast into the side of the pump at the pipes end. search. Question: Why is the JP pump not turning off? Do I need to unplug the recirculating pump to prevent damage while the house water is off? Pourquoi la pompe JP démarr... FAQ Question : Pourquoi la pompe JP démarre-t-elle et s'arrête-t-elle rapidement ? . Tim Tim. Hot Water Recirculation Pumps. Water movement in system. My Central Heating Pump is Constantly Turning Itself On and Off. Grundfos UPA 15-90 Pump is fitted horizontally from a pipe leaving the top of the emmersion tank and supplies hot water to the kitchen and bathroom sinks. Grundfos Suisse. posted 2013-May-25, 10:25 pm AEST O.P. Will turning the pump off create more problems ? Plus nothing the tank could do would cause the pump to run continuously. On turning the system on again this morning, the same thing appears to be happening, water and heating is coming on as needed, but the thermostat is not kikcing the pump out when I turn the temp down...the pump just carries on humming and getting hot! 1 is the slowest water flow rate and 3 is the highest. Turned water off to house and it still intermittently cycles. Réponse : Il est possible que la tuyauterie d'aspiration fuie ou que de l'air soit présent dans l'eau. . It is a rainbank. Where to start. In order for me to stop the pump I have to swith off the power at the CH mains supply. Do review the article above. If the air doesn't get out, the tank is most likely still good. FAQ. Reply: Don't turn off the pump as you may lose prime. I. IST. À propos de nous Carrière Nous sommes des pionniers Grundfos en Suisse. Do not use force when connecting the pipes to the pump. Assistance. Kitchen tap only activates pump 50 / 50, so … Water Pump keeps on running - how to get the water pump to shut off How to diagnose & fix a water pump that doesn't shut off: this article explains how to diagnose & repair a bore hole or well water water pump that keeps on running and won't shut off. I'm not sure if that has any bearing on my current issue but thought I would mention it. The pump is not working. Let me know if questions remain. Click to see full answer. Connected tapping points or cisterns may still be running. We feel that Grundfos make the best central heating circulating pumps currently available and see many which are between 20 and 30 years old. Check the rotation of the coupling or motor fan. to bleed a pump, turn off the system, then undo the silver screw in the middle of the motor end of the pump.Water may dribble out (it will not squirt out) and you may get air first. Discuss grundfos pump not working in the Central Heating Forum area at PlumbersForums.net. Pump Problem 5: Pump speed settings are incorrect. 11 1 1 silver badge 2 2 bronze badges. The pump should also not be installed with the black circular face on top as it makes it more difficult for the pump to expel any air and leads to rapid bearing wear. Powered up electrically as it says in short bursts then left … Check whether the backflow preventer is present in the suction line and that it is working properly. Being off for 10 days should not be problem. Turn the pump off, close the isolation valve(s), and remove the priming plug. If not air the tank up to 30 PSI and see if it holds that for a few hours or a day. Vérifiez si le dispositif anti-reflux e New Shower Pump will NOT switch off !!! User #466497 33 posts. The room stat is calling and the boiler is firing, but no circulation, just the flow from the boiler heating … Help. Then while no one is using water shut the pump off manually. Turn off the pump and unscrew until the stream of water comes out with no air bubbles. Regarding this, how does a Grundfos circulating pump work? 1. Do not remove the pressure tank from the pump unless it has been vented through the air escape valve. Your home heating system is a typical example for the use of a circulator pump. Now have dirty water. Status Not open for further replies. Cheers. It has only been used occasionally. Contact. Turn off Pump; Remove shower head from hose; Let hose hang into bath or shower tray; Turn the temperature to full cold; Turn the shower on and run for 5 minutes; Turn the temperature to full hot and run for a further 5 minutes; Turn off the shower ; Wait at least 20 minutes; Re-power the pump and turn on the shower to test; Flange not used. Water may dribble out (it will not squirt out) and you may get air first. I'll have a look in the morning for the things … Participant reference: whrl.pl/RdBg3T. Circulator pumps can stop working for several reasons: a blown fuse, bad wiring or a dead motor. 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