One problem that’s overlooked when it comes to overheating boilers, is the pump. It got so annoying that I decided to turn the wall thermostat controls to 'off' but it still does it. LOFT1009. Recently it burnt out and was replaced under warranty. The pump on our system keeps on running well after everything has switched off - usually all day. Our two year old TACO cartridge cirulator pump is running constantly and now very hot (moreso than the supply pipes) - probably been running that way for a couple weeks, at least. There are three circulating pumps attached to the boiler. Currently we are only putting on the hot water. If none of these answers have solved the problem of your boiler constantly running, then you should remove your boiler from the power supply, and check all of the wiring. Whenever a cold snap hits – lower than 25 degrees here in Atlanta Metro – your furnace or heat pump may seem to run constantly, leading you to believe that perhaps your unit is too small and unable to keep up. The mid position valve is sticking (this can be lubricated with WD40). Had it on my own CH/HW system? Questions about central heating and boiler questions in here please. Supervisor. Page 1 of 2 1 2 Next > goodtyneguy Member. The only way to stop the pump is to switch the whole system off. Woke up in the middle of the night rather hot. Checked the programmer and both heating and hot water … It does not seem that a zone valve is stuck, the various parts of the house heat and cool normally and it's not like the heat is constantly running in a zone. pump constantly running? Worcester Greenstar Cdi. Furnace Running Constantly? … read more. If the pump is running for hours on end, or constantly, there may be an issue with the system. Follow our boiler circulating pump troubleshooting checklist below to find out how to fix the most common problems. Midwest-Esteemed. Generally, no. The problem is that the boiler pump seems to run continuously in the boiler (24 hours a day). Apr 10, 2017 #10 Without going back thru, could it be the heads gone on one of the valves? As setup now the circ pump runs all the time when the outdoor temp is less than the Vitotrol 300 setpoint, wasting alot of energy. This official sponsor may provide discounts for members. I have recently noticed that the pump on my Vaillant boiler is running constantly even when there is no demand from either the DHW or CH. There is a simple explanation for this. Recently moved into ths house and have had the heating on as well as the hot water. Anyone got any ideas? Worcester Bosch Cdi Boiler Pump Running Constantly Working; Central Heating – Over running pump – Advice needed After a weekend of pretty heavy use our central heating system is showing its age a bit ðŸ™x81 Sunday night after the heating “clocked off” the pump continued to run despite the boiler being off. Discussion in 'Plumbers' Talk' started by Old_duffer, Jan 16, 2018. Reaction score 10,006. I have a recently installed oil fired burnham steam boiler. Old_duffer New Member. ?--stuck circulator? So you can get your boiler up and running again. Turned the boiler off at the mains and the radiators slowly cooled, but there was a constant noise from the A/C, as if a pump was constantly running. The PCB is faulty and telling the pump to run when it should not be running. My base-board heating is not hot. Next you say the hot water works correctly, and have you checked it isn't sending a signal back to the boiler. The water does get very hot even though the (new) tank thermostat is set to lowest position. Source(s): condensate pump continuously running: https://shortly.im/c4cAt. Get a fixed price for a new Worcester Bosch online. You should also check the temperature of the water. 10 years ago. Moderator: Moderators. Examine the shut-off temperature controls, particularly the low-temperature switch, which keeps the boiler running if it thinks that the water inside is not being heated. Pump constantly running on Vaillant VCW GB242 EH? Everything seems to work ok when I require either DHW or CH but the pump will continue to run constantly after the event. Can this be a relay on the control panel in the boiler or the aquastat on my super-store hot water tank? The boiler tripped out last night when I had it on the 24 hour setting to heat some water up. The boiler "issue" I had was that when a call for dhw was initiated, the boiler pump turned off as to keep the boiler from pumping too hot water into the system, and yet the system pump stays on for the duration of the call, cooling the radiators off substantially. T. tipintim. pump is running even with programmer switched to off position,I'm just wondering if the receiver is faulty (never encountered one before) thinking of disconnecting recieiver . Worcester Greenstar 25Cdi, Worcester Greenstar 27 Cdi, Worcester Greenstar 30 Cdi, Worcester Greenstar 31 Cdi. Piping is traditional pri/sec except I have a buffer tank piped in as the pri/sec connection. Discussion in 'Plumbers' Talk' started by goodtyneguy, Sep 8, 2010. 0 0. Boiler on no demand: Pump over run faulty. My Profile My Preferences My Mates. Faulty pump. I tried moving the manual zone valve levers figuring maybe it was stuck a little bit but that didn't help. Looking for suggestions on how to control the circ pump (Boiler pump [20 plug] p68 of Start-Up/Service instructions) so that it is only on when there is a call for heat from one of the 3 zones. Worcester Bosch Cdi Boiler Pump Running Constantly. Checked the room stat (DT90E) on the landing and the temp was showing 25C set at 21C. I have a recently installed oil fired burnham steam boiler. The main problem with the pump and boiler running all night is that the boiler is in the garage which is difficult to access in the night/morning to turn off/on so if I could use the on/off switch on the pump until I fix the MVs that would be great. Search My Stuff. I set the wall controls so that the heating would only come on if it was below 22 degrees (which it hasn't been yet) but noticed that the boiler is constantly making a noise. The boiler has a weather compensating controller fitted (FW100 or Wave smart internet connected controller). A proper pump diagnostic needs to take place. I've recently noticed that the central heating pump (Grundfoss) is running all the time. If there are issues with your boiler, you need a Gas Safe registered engineer to handle the repairs. pump on heating system seems to be running constantly ,boiler seems to switch off but come back on very quickly two zone valves seem to be operating as normal. I have today got him to turn off the two other zones and run just the hot water and the pump is running constantly, sticky valve or knackered microswitch or wiring faux pas? In the past, we’ve seen pumps constantly running due to: Faulty PCBs (the circuit board on the boiler). 6/26/2019 0 Comments Morning All, This topic has 25 replies, 12 voices, and was last updated 8 years ago by . It's entirely possible that it's had been running for the two years that we lived here. … Recently the circulator pump (taco) has been running constantly even though no zones are calling for heat. The circulator pump on Weil-Mclain boiler keeps running. Either way, I would expect the circulator pump would stop running if no heat is being called for, and the water tank is not calling for heat. Been through the instructions manual and online and can't seem to … The boiler was just cleaned last week, but I can't say it has been running since then, or if this started prior to the cleaning. I have resorted to switching off pump because it is beginning to annoy me! Felt the radiator in the bedroom and it was red hot. It's making a louder than normal sound as it runs, almost like sandy water/grinding noise. Any danger in doing that? All appeared to work ok for the 1st month or so of use after the boiler was put in. 32,405 satisfied customers. If it develops a fault then the hot water won’t be able to leave the boiler which could cause the unit to overheat. The pump will run constantly to monitor the flow temperature and maintain heat curve. A heating engineer might be able to repair the pump but it’s most likely that a new pump … Can't remember now, but nc … Boiler running all the time even with the programmer off. All the zone valves appear to be closed. Central Heating – Over running pump – Advice needed After a weekend of pretty heavy use our central heating system is showing its age a bit ðŸ™x81. Sorry for all the questions and many thanks for your help so far. We only put it on for an hour in the morning and an hour at night. At the end of last winter I discovered that the circulation pump was running constantly. High efficiency, modern gas boilers fire at different rates depending on the load. Arms . The job of the pump is to circulate water around the central heating system. Pump overrun stat is faulty. If the rads are cold when the pump is over running then I suspect the pump is controlled by the boiler and something is bust. Central heating boiler pump running continuously. More complete answer: It depends upon how the boiler is configured. I have a Well-McLain Series 3 P-D--7 boiler that I believe to be original to the house which was building in 1968. What's New 3 12 24 72. boiler not firing up, pump seems to be running… Got boiler running--circulating pump hot but not feeling pipes getting any heat?? Lets get rid off the heating valve first, you say you switch the htg off and the pump and boiler keeps running but the rads don't get hot, that is what one would expect, because as soon as you take the power off the valve it closes, so forget it. This problem appeared to exist (at leat intermittently) on the system before the old boiler was replaced (the valves were not replaced). Other that that it is all working perfectly, heating working when I need it in every room and loads of hot water. The control panel indicates a continuous "call for heat". boiler not firing up, pump seems to be running. It's a grundfos pump working with a Potterton Suprima 30L wall mounted fan assisted balanced flue gas boiler. Rick. Thanks . Every unit is installed with a “set point”. If I trip the mains switch, the nosie is gone, but comes back as soon as I turn it back on. No water running around the system ; Noisy circulator pump; Blocked pump; Leaking pump; Incorrect speed settings; Loss of power; Pump won’t switch off; Incorrect installation; No water running around the system. 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've moved into a new flat that has a vaillant boiler. Possible causes are a faulty pump overrun thermostat or timer, or a damaged PCB (Pump Circuit Board). 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