Blocked Plate Heat Exchanger (Sludge) | No Hot Water | How To Unblock | Viessmann Boiler

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In this video I show how to unblock a plate heat exchanger on a Viessman combi boiler. A sign you will need to do this is when the hot water keeps going from hot to cold but the heating (radiators) work fine.
Over time sludge builds up in the plate and causes the boiler to overheat as the water can not circulate properly due to it being blocked.
Tools used in this video:
Draper Screwdriver Roll/Set: amzn.to/3Xmh6Zz
Bahco Adjustable Spanner: amzn.to/3lupI3c

Опубликовано:

9 мар 2023

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Комментарии : 73

@assistantto007 Год назад

Do you have to be gas safe registered to undertake that task?

@GasTraining Год назад

Gas safe to touch the boiler components my friend. Don’t play with gas if you ain’t gas safe.

@dylanbrandley7888 Год назад

Gas safe as soon as you open the combustion chamber!

@assistantto007 Год назад

@@dylanbrandley7888 OK, does that mean the water side of the boiler (& the electronics) can be serviced by non gas safe engineers ?

@ranat5526 7 месяцев назад

@@assistantto00730 years ago I became a corgi registered gas engineer, 70% of the people on the course were duffer's!

@500bht 7 месяцев назад

No gas safe needed as you own the boiler it's your property so do what you like to it

@user-li8gr8ur8l 3 месяца назад

That is a top in depth video as usual❤

@marcush6139 Год назад

I will say karma I do enjoy your videos as a new engineer is help me out greatly. The only thing I will say you make it look so easy because you do all your jobs one-handed where I struggle with two lol. Roll on the next video

@advancedboilertraining Год назад

Haha! New vid coming soon 💪

@rm-mastering Год назад

Great video and yes top marks for one handed work 🏆

@advancedboilertraining Год назад

Haha thanks!👊

@Carl-re6zb Год назад

Great vid for anyone wanting to gain confidence in boiler repairs.

@advancedboilertraining Год назад

Glad you think so Carl 💪

@muhammadAli-kd2zp Год назад

Thank you for your time to share with us . Great job 👏

@advancedboilertraining Год назад

Thank you!!💪

@thebigblackguy Год назад

Thanks for this. Subscribed 👍🏾

@abdulaziz-pb5ni Год назад

I watch all Ur videos they are good and top engineer. Can you do one doing right hand blocks and left blocks repairs

@dylanbrandley7888 Год назад

Some of the things you do whilst holding a camera, sick 👍

@advancedboilertraining Год назад

😎

@nipperh2o925 Год назад

Great tips

@advancedboilertraining Год назад

Glad you think so!

@mikegallagher2107 Год назад

great content i use this method as well 👌👊

@advancedboilertraining Год назад

Great minds think alike 💪

@sharazali-tabassam3033 Год назад

Good video 👍

@advancedboilertraining Год назад

Thanks for the comment! I really appreciate it 👊

@cliverice5651 Месяц назад

Thank you for a very informative video. What brand of spirit of salts do you use please? Thank you. Very best wishes Clive

@user-yr7re1fd6i 6 месяцев назад

Helpful video! If you find that the air valve on the expansion tank leaks out some water when you go to charge it, is that a problem or a sign of a faulty tank?

@trevjones4564 10 месяцев назад

Thanks top video

@kovacstamas7332 6 месяцев назад

Good job. Thank you. That was the soultion for me.

@jockster5525 Год назад

Nice job mate 👍

@advancedboilertraining Год назад

Thank you!💪

@andrewhull6776 8 месяцев назад

Smart guy

@msangwan7 Год назад

Hi thanks for video. Do you find this PHE blockage on central heating close loop side or cold to hot fresh water side also. Can this unblocking be done on fire main heatexhanger side. does main HE ever get blocked providing there is an inhibitor in the close loop?

@advancedboilertraining Год назад

So usually the blockage is on the CH side of the plate. I’ve never seen the HW side blocked up So yeah, if the system is really dirty then the main heat exchanger can also get blocked

@rickd6421 Год назад

Great video mate. I wouldn't be able to film and work with 1 hand so great work :) If the plate hex seals feel and look smooth and not perished, do you just leave originals in when reinstalling plate hex?

@advancedboilertraining Год назад

Haha! So I always try to change the seals when I can, but if I don’t have any in the van and they seem to be in good condition then I’ll leave them

@ronalynaguipo9666 26 дней назад

What chemical you have used sir? Thank you for sharing

@alihapali 2 месяца назад

Any chance we can fit a filter somewhere to stop this blocking mine gets blocked every week even we powerwashed it

@ozwellalford5015 Год назад

Nyc Job

@advancedboilertraining Год назад

Thank you!👊

@raj080288 2 месяца назад

If there is a pin hole and you say the pressure in the boiler will always be going up, would that be when the heating is on or even without the heating being turned on?

@damiebgibbons5710 7 месяцев назад

Morning great video , have a problem like yours , the thing with my vessmann is that the boiler is not firing on hot water, there is a full flow out of the hot tap , checked the 3 port vale and it is moving freely, could it be a stat or the heat exchanger thanks

@Dee-iy4ot 4 месяца назад

not firing, is nothing like the problem in this video!!

27 дней назад

Iv heard you can use brick cleaner.?

@karlsanderson8127 2 месяца назад

I need to do this on my glow worm the part was only £40 so going to give it ago changing it

@shafiqmustafa2777 4 месяца назад

I have the problem, will need to buy a new plate, £160 + labour cost, do you work in London

@jorgetristany 4 месяца назад

Name of liquid to clean the exchanger?

@juniorjassal1995 9 месяцев назад

Would you always replace the 4 o-rings on the manifolds when taking out the plate?

@Dee-iy4ot 4 месяца назад

good info , = = = however spirit of salts ( Hydrochloric acid** ) = = = = is too harsh for stainless or alloy ( **Thats why they get pin holed ) . Use a regular kettle descaler instead. and flush both direction with water

@andrejrockshox 8 месяцев назад

what is the price of new plate?

@joshd790 Год назад

Good video mate shame it was a only a 7 minute one

@madmaycon2531 5 месяцев назад

Your videos are very good, they are very helpful, especially for new qualified gas engineers like me. Thank you so much !!!

@christophersherratt7299 4 месяца назад

What is spirit salts

@bluedwarf8858 Год назад

Did you have to use new o rings on the plate heat exchanger

@kevinschoales844 Год назад

Not sure if he showed whether he cleaned the seals up or replaced them, allways good idea to have replacement seals. & they can fall off !

@tomdutton4673 Год назад

What spirit salts do you use ?

@advancedboilertraining Год назад

Usually use the knock out one

@davebayliss3142 4 месяца назад

Spirit of salts will rock the inside of that plate exchanger doesn’t matter how much water you flush through afterwards

@richardhodgson7443 Год назад

Will the plate only go in one way? Cheers

@kevinschoales844 Год назад

Yes mate

@DaveInBridport Год назад

That HCl is evil stuff! Need to be SO careful.

@vladimird3575 8 месяцев назад

What chemical do you use to clean it?

@GasTraining 7 месяцев назад

Spirit of salts

@mcDarkD 16 дней назад

a ballfix valve to fill the boiler no checkvalve. i do wonder why the plate was that clogged. not. why am i not surprised..

@cippollino83 Год назад

Where do you buy spirit of salts?

@advancedboilertraining Год назад

Any plumbing shop should have it in stock

@mehmetmetin8783 4 месяца назад

👍🧿👏

@marcjohndavies8244 Месяц назад

Is it legal to flush that down the drain???

@kirren7255 Месяц назад

If it's a soak away drain, that's really not good for the environment, standard drain it's okay, personally I would just fit a new plate and have old plate recycled. Plus it a lot safer, did you hear him cough due to the flumes 😷

@maddawglodbrock1380 8 дней назад

It’s a common fault with these boilers its the 2 black rubber pipes that run up the side they corrode and the rubber falls off and blocks up the plate heat exchanger