No Hot Water - How To Test Plate Heat Exchanger - Combi Boiler not working

Plumber Training. How to check why your hot water isn’t working. Gas Engineer Training.
How to repair gas boilers. Testing to see if a plate heat exchanger is blocked.
How to test and how to find the correct parts.
Boiler not working how to check.
Combi Boiler not working, No hot water.
Blocked plate heat exchanger.

[efrygasservices]

Love this video. This fella showing this test is bang on. In the real world, if you can’t achieve the desired flow rate to carry out the test, you have to use your noggin’ a little more and that is where experience comes in. To the apprentices watching, listen to the old fart that is trying to teach you. We may not be ‘cool’ but the odd few of us know a thing or two. Top effort. 👍

[joedefloat]

Fair play to that man for taken the time to educate both me and others a very informative video thank you.

[RajeshBangera-xi]

Very informative video of diagnosis. Also especially finding the ideal boiler parts. Cheers for that.

[saedsorean]

Thanks to Allan and the a lot whoever made the video.this is an amazing video, there no more you need for that particular fault, it is basically a significant help.

[kevinbrown]

Great video Alan.
A big thank you to Ideal man.
Next video leak in main heat exchanger 👍😂 please.

[faridratni]

This is one of the best video Thank you so much

[avnishkumar]

Best video to diagnose plate heat exchanger!well done

[michaelrose]

Absolutely brilliant video Alan. Tried this today at work.
Thank you

[hamzaparvais]

Thank u for sharing knowledge brilliant video help alot bless ya

[md]

Great video. Very well explained. Top stuff.

[mmc]

Hi Allen, thanks for your videos. Always learning something new.
You mentioned that Kevin is sending you lots of in depth videos. Any chance you could put them all in a playlist?

[tommyblackman]

Excellent video Allen, great tips and something to take on board. I have the testo probes myself and use for boiler commissioning..

Can you do a video on balancing radiators using the testo probes... I’ve tied but struggle to get the ideal 11 degree difference between flow and return

[antoniogalluccio]

So to recap first test between hot and cold and check for 35⁰C temperature rise and stable reading. Then test between hot water outlet and pipe between pump and main heat exchanger, there were 20⁰C difference and there should be zero or close to zero. But when it finally became 0 on third attempt, is it because you cleaned the plate or you put the clamps somewhere else? Thanks advance!

[foxy]

Very good video,
sorry if this question seems silly, On a boiler with a 3 speed pump, Does the speed setting of the pump have any bearing on the heat transfer temperature from the main heat exchanger to the domestic hot water at the plate heat exchanger or will there be no difference what ever the pump speed is

[zhangzetong]

Hi Allen, i have hot water running very slow in all tap in my apt, do you think is cause block exchanger? Many thanks

[markstewart]

Thanks Allen have really enjoyed your videos and learned a lot.
Is it common to have initially very hot water then going luke warm if the Heat Exchanger is block or faulty?

[jassinghIG]

I always worked on the principle a max of 5c dt it’s ok. Good to know though. I was working on Vaillant parameters.

[gibfear]

Can anyone help me diagnose my issue - basically turn tap on, might get a little bit of hot for a few seconds (in the PHE?) then cold - then takes ages, a minute maybe of completely cold water, then the hot starts to come through. Once flowing it's fine, stays how, flow rate no problem, runs all day.

I swapped the DHW spinner last year, when you turn on a tap the sensor lights up solid instantly, boiler seems to start.

I removed the diverter valve and stripped it, cleaned it in ultrasonic cleaner, put in new seals, rebuilt it with lashings of silicone grease

Actuator works fine, tap on, tap off it moves in and out and the plunger pushes in no problem in the valve (did before cleaning anyway) - heating outlet not getting hot when waiting for water

PHE off and cleaned with drain cleaner and in ultrasonic, just a bit of rusty crap coming out, no sludge in there and it's a soft water area so no limescale.... Water flows though both sides well from hose pipe.

Again once running hot water is more than adequate, heating works fine

Waiting for a plumber friend to come check gas pressures etc as very rarely do get an ignition failure - can't see it being that as it locks out after 3 failed starts and it's very rare (maybe 1 this year)??? Boiler did have a gas valve about half it's life ago as it had turned into a vuvuzela....

I'm stumped!! Help lol 😄

[robwoods]

Very good video. Good to share the knowledge. Can't understand why some thumbs down? 👍👍

[iheggis]

what would happen if you put a 35kw plate on a 24kw ideal combi?