Excellent this is the only video that shows a full teardown of this type of pump. Thanks

Great video. ~You helped me fix the central heating pump and saved 200 pounds. Well done. Amazing !!

Brilliant, thanks for this video. Was about to blow £100 at Screwfix , but accessed the pump with a screwdriver. Impeller was siezed, but gently moving back and forth got it free. Switched back on and didn't turn but a couple of gentle taps on the flange with a hammer and...Result: central heating again! Now I know how, will take apart to make sure impeller is clear. Thanks again.

Thank you so so much for this video I've just managed to get my central heating back up and running after following your instructions. You Sir are a legend :-)

That is the best explanatory video I think I've ever seen. Well done.

brilliant info bro. years of experience given to me in minutes. thanx very much.

Very informative. I've been texting my young nephew about my heating problems and he's diagnosed a faulty pump. He's fixing it for me when he next visits. Yes he is a qualified gas engineer.....

Thanks very much indeed. As soon as you got to the bit about freeing the impeller with a screwdriver, I remembered what to do. We have this problem every year when we put the heating back on. I can't complain though, the Grudfos is about 40 years old and still going....fairly strong!

great video, short to the point but highly informative. Thank you. BTW love the beautiful white candlewick bedspread! My problem is on a 30year old Myson pump LC 4210 but having watched your video I got it back into service. Many thanks again.

Excellent guide and advice. Breaking off the seized shaft resolved my problem. THANKS. N.B. Just as Sebastian advises, make sure the pump is cool and disconnected from electricity. Mine had to stay connected to the pipes and I thought I was turned off but as soon as the shaft was released, the pump started working and pushing some hot water out. I stopped it very hard with taking the fuse off. So, be careful.

Excellent video. Highly informative, thank you so much.

Thanks a lot for this video man! now my heating system at home is working now. keep it up! very good and very informative.

Thank you you saved me a lot of hassle on a bank holiday the video gave me the confidence to look at it myself. Now all ok.

thank you thank you thank you. this is the best explanatory vid on youtube. thx a lot.

Really useful vid, thanks! My pump had seized up but you gave me enough info to unscrew it and coax it back to life.

Thank you very much for the perfect explanation. My pump had seized up but you gave me the solution!

the first tip help to get mine running. Good man.

Thank you. I was trying to understand what is a shaft and where impeller spins on- Very clear from your clip. Thanking you

Problem SOLVED !! Followed your advice and as it happened the pump was seized and full of air - Had a cowboy plumber in yesterday and his diagnosis was that the timer needed replacing - Thank you thank you thank you

Great video, just found the need to carry this out, thanks.

Great way of explanation, well done!

Sabastian, You are a Professional. Thanks very much indeed.

Thanks a million. Very educating. My Grundfos 25-40 suddenly seezed TODAY (-6°C outside...)

Thank you for your video it has helped me in my training

Thank you very much for this valuable information. Very helpful.

That was a great video clear and presise and , thanks for the help...many thanks !!

Thank you very much for sharing you knowledge!

Perfect explanation, thank you so much.... You saved my couple hundred dolars.

Great Video. Thanks gave me a lot of good information

Very informative and clearly explained. Thanks :)

great material. I managed to restart my pump

Excellent. Thanks for posting.

Nicely done. Thanks you so much!

thank you that is the specific information that i require to help me decide wether or not i need a new pump

Mine was air locked! House getting warn now. Thanks for posting.

Very informative video. Thank you

Very informative....thank you!

Bravo majstore, thank you very much

Thank-you. Very informative

Excellent for my heating engineering training thanks

Very helpful keep the videos coming

Thanks for this information.

Great stuff - thanks!!!!

Most helpful thanks.

Same here, thank you!

Good video!

Super video thanks

Great vid cheers

AWESOME VIDEO!!!!! Many thanks!!! :o)

Thanks. Keep going.

Very helpful thanks

I could hug you man. I removed the silver screw, freed the slot behind it, and now I have heating. I can't tell you how much I appreciate heating at this time of year. Question is, I assume it seizes for a reason - is there something I should be looking for, or at least keeping an eye on going forward, rather than just ignoring it until it gets cold again? Thanks again!

Very helpful and clear, thanks. Used it to debug my Wilo pump. Water had collected in the electrical box that was installed so that it was under the pump. After leaving it to dry out I am now able to kick-start the pump by cranking the shaft with a screwdriver as described - and the pump starts and runs no problem. However it can't start on it's own - if power is removed I need to manually crank it again. I've tried exchanging the capacitor with another from a working pump and no joy. Removed the allen nuts and no blockage. Any thoughts..thanks again!

Cheers mate!

Hi. I needed to replace the power cable to the pump but as the cable was remove the capacitor became detached. What terminals does the capacitor connect to on re-assembly?

My pump is working only on 3d speed not in 1st or 2nd and it is making kand of strange noice like barrely is circulating the water . Should i change capacitor or to put new pump

Great video. My pump doesn't appear to be seized and starts spinning when you apply power, however you can stop it from turning with very light pressure on the shaft(with a screwdriver). I have no flow in my heating system :( is it time for a new pump?

Hi. Yes. Great video. I have just installed a circulating pump and it is very noisy. It sounds like it is running dry. I have undone the screw bleed valve and water trickles out. What do you suggest I do? Many thanks

My Wilo pump is failing to come on at the mains. Sometimes if I disconnect and wait around 20 mins it will come on again and start pumping the hot water around the system,but today its failed to start. Any Ideas ? My main concern is that I am running a 21kw wood burner and if I don't pump the water through the rads the hot water cylinder will get to hot .

Could you check the resistance of the windings to see if there was a possible open (or short) circuit?

Very 👍 good the best 1 I've watched.. no heating... wanted to know possibly if the capacitor was gone... as this describes brilliant step by 🚶‍♂️🚶‍♂️ step. 😊🙏 Ireland 🇮🇪 North.

Hi, very cool explanation! I am aiming at reusing almost the same 3 speeds pump but which has no control box anymore, only 6 unmarked wiring plugs , so wondering : how to guess the neutral? can it work without capacitor?? Any advice highly welcome! Thanxs

I've loads of hot water, but no heat in any of the radiators? The pump is hot. Anything I can do there?

Our wilo star pump is very hot and doesn't appear to be circulating the water through the radiators, although it sounds as though it's running. I'm in the process of bleeding all lines to cover the possibility of air in the system. Is it okay that it is hot to the touch?

Thanks for the video. I dont understand why if the rotor is submerssed in Water, there is also a mechanical Seal?

Very good

you could do an ohms check across the pos and neg terminals to check the capacitor good or faulty

thanks bro

I got jammed Grundfos 25-80, it was very hot when plugged in. Is there a way to repair these pumps. They are quite expensive, 400-500 euros.

can you test the capacitor with a multi meter..on omp??

I didn't find a solution...and didn't have time to debug it further as house was getting cold..But I reckon the starter windings were damaged maybe due to corrosion or simply moisture...replaced it with the next gen pump in the same series and it now specifically says to install it so that the control box is on the top side..I guess to avoid any leaks dripping in

I opened mine and i saw the impeller out of the rotor.What type of screw is holding the impeller to the rotor please.This small hole 3mm doesnt seem to have internal thread.so can not be screw.I imagine is a type of rivet with top head washer 12mm.Do we put any glue???

Hello Sebastian, Can you tell me if the pump is getting voltage shouldn't it be spinning? If that is the case and it's not spinning would you recommend changing the capacitor or the entire pump? Many thanks for any input you can share. Steve

I have a problem with that exact model of pump, where sometimes it won't start, unless you change the speed to 3 then it bursts into life, and will then run quite happily on speeds 1 or 2; in fact it will then be fine for a few days. Is this likely to be the start capacitor?

@BMonique

7 жыл бұрын

same here. Hoping for an answer too

Helpful vedio.can any one please tell me which multimeter should I buy it confusing .

Hello my name is Darren,problem with my wilo 50 gold is the 3 speed dial has gone,not clicking through the speeds,can it be fixed and if so,can you advise on how.Thanks

Hi, great video... very good. I'm looking at this video as today, I've noticed that the radiators in the house are cold downstairs, warm upstairs so I'm guessing its but being pumped around. The pump/system has been noisey lately, banging pipes etc. Today, I've noticed that now, the pump just has a buzzing sound. Could you tell me what this is likely to be before I get the unit replaced? Much appreciated. Thanks.

@2pfromme

9 жыл бұрын

I have a similar problem as of yesterday but since you didn't seem to have had any replies with respect to your question; I can't attach much hope in here!

Hi. I tried to take front screw and its water spraying out like from a narrow hole. Is it usuall?

@Triune3

6 жыл бұрын

Its grundfos pump on a glowworm 30cxi

please HELP ME,our pump GRUNDFOS is heating too much,first i didn't noticed that the pump was heating, i think it doesn't,but now how the temperature rising and the pump starts heating too much and is hearing some sounds,is this a problem or ? PLEASE HELP...

Very helpful video. I have a Grundfos UPS 15-50 pump which is fairly old. Recently I started getting a noise a minute or so after the pump starts running. I have assumed the noise is from the pump & sounds like a noisey bearing. After 15 to 20 minutes the noise disappears & the pump continues to run quietly for the rest of that heating period. If the boiler is not on for long the noise appears to stop as the boiler flame switches off, but the pump continues quietly for a while till the boiler switches it off. At first I assumed the bearing got quieter after the pump expanded with the heat of the system. But that doesn't explain the pump going quiet when the flame goes off. Would appreciate your thoughts.

@plumbteam

6 жыл бұрын

Run system with flame off. If noise doesn’t occur it’s probably the boiler ‘kettling’

@TopTimotheus

6 жыл бұрын

Very sorry for not replying sooner. I've assumed it was 'kettling'. The only way I could see to run with no flame was to turn gas off, but system kept repeatedly going through the startup procedure, not running continuously. any way the noise did not occur. The noise has now disappeared as mysteriously as it appeared! Thanks for your expertise.

@gfriedman99

5 жыл бұрын

TopTimotheus most likely you had some debris in the impellor that is dislodged now

my hot water works fine but no heating in the house! anyone knows what could the problem be? the pump turns on (shows a green colour) fine when using hot water alone but doesn't turn on when using central heating

Have a different pump. It did not run so I replaced it same as before the relay click on and I do get power at the pump for about 30 seconds then it switches off.

try using a multimeter for resistance

Thanks for the video. Having trouble with my pump. Capacitor is cracked and bulging but pump still sounds as if its running. What effect does the capacitor have on performance? Thanks

@dawkinsm

6 жыл бұрын

Matthew Voyle capacitor is used to start pump. Gives it the push it needs to get it going. My capacitor had gone bad so pump never started itself. Had to take screw out every day to give it a nudge and it then ran fine until it stopped. Same every day until I replaced capacitor. Crack doesn’t always means capacitor is dead, but I’d replace.

@mdrv8141

6 жыл бұрын

Mike Dawkins. Have replaced the capacitor and immediatley my problem was fixed. £3 from maplin

Where are the bearings located? And are they replaceable?

im18 years old got my level 2 plumbing, could u upload more videos about centrel heating and pumpes and valves

Hi Sebastian - are you implying that I can remove that large screw to test-turn the pump using a screwdriver, with the system full of water? With just a gentle leak of water? Or do I have to drain the system before doing that?

@dawkinsm

6 жыл бұрын

Mark Wheadon you can yes.

How to test it with multi meter??????

Hi when I turn on my boiler the electric tips out would the pump cause this to happen .?

@louismannion1626

7 жыл бұрын

matthew wood can do if it's cracked and leaking internally. also check there is no leaks anywhere else by the cylinder ( if you have one) water dripping onto a zone valve can cause this problem too

My hot water is working well, but, radiators are not kicking in when I turned on the thermostat! would it be possible that my pump is faulty? pls reply, thanks.

@louismannion1626

7 жыл бұрын

Larie Enriquez no, will be a faulty thermostat

How about a Vaillant 242-5 (Grundfos pump) error S.7 Heating mode - pump overrun error. Stopprd producing heat.

I could not find out any information how to revise rotor, how to open it etc.

What if the pump ceases repeatedly? Like after a few days. What are the likely causes and solutions?

@BMonique

7 жыл бұрын

am following have the same problem

@Bomberboybrad

7 жыл бұрын

I overcame this by turning the speed up to level 3 setting rather than the mid level 2 setting I had before. I assume dirt was clogging and the faster speed allowed the sediment to mix with the water and disperse at the higher setting. I was able to then turn it down to level 2 setting later.

@BMonique

7 жыл бұрын

allright, well in my case, the pump is ok but the controller was ''the bad guy'' ! Tempolec PS005 sends no voltage to the pump......(all of a sudden)

What about testing the ohms on the pump 🤔

I have this pump it's started getting noisy . Is this on its way out?

@louismannion1626

7 жыл бұрын

James Baillie yes.. bearings are one there way out

That’s helps with my pump thank you , I save probably few hundred quid

Should do dead resistance check

most test is visual only?? test it please

Pump runs on setting 3 but not 1&2 any explanation

@fatlindi78

5 жыл бұрын

Same in my case

Checking the resistance of the pump will tell you if its faulty