GAS BOILER SEQUENCE OF OPERATION PART 2, how gas boilers work, how to fault find on gas boilers.

in part 2 of 2 how gas boilers work. In this video Derek from tomkat gas training takes us through the sequence of operation of a gas boiler but shows us what the boiler will do when certain parts fail and what fault code the boiler shows to help us identify and rectify the fault.
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[@josealbertorodriguez3297]

Hi , Im from Spain. I just finished a course of technissian of gas, I dont understood many things in my country because my teachers and thanks to you and your videos I learn too much,finally I understood many stuff. Sorry for my English I dont practiquese too much. Thanks thanks thanks thanks. Take care. You're the BEST.

[@tomkatgastraining]

muchas gracias 👍🏻

[@andreilapo1973]

Best trainer out there 100%. Thank you

[@azimkhan9862]

Dear Derek, your work is much appreciated and I'm sure will be used by many up and coming future gas engineers.

[@tonywardell3411]

Best video I’ve seen on TH-cam explaining faults. Thanks derek 👏👏

[@johnf3326]

I was waiting for a combination of buggerations that would make it go BANG! 🤣

[@emekaABC]

.......another master class from Derek, again ...well done !!

[@willlomas2725]

Thank you Derek...fantastic video.

[@mohammednadeem7274]

Another brilliant video Derek, very useful for us. Thanks 👍👍😀

[@matthewsavory5037]

Great job thank you. I'm just getting back into boilers after a long stint meter fitting . Great refreshers these videos

[@mj0n4id36]

Very useful. Will be watching this one a few times just to get my head around it. Thanks Derek much appreciated 👍🏻
Asian Jon. Training.

[@shannonharris7126]

Hi derek,another great video.keep up the good work😎👍

[@kelvinjones1995]

Really informative,thanks Derek,old dogs can learn new tricks!

[@dannymatona3506]

Thanks for another informative excellent helpful vid.

[@williamhoughton1484]

Fantastic video Derek 😊👍

[@jamalamin082]

Amazing vid once again 💯🔥🔥

[@leonardbalint4930]

thank you very much for your effort , very informative, really appreciate it

[@ahmaddarwiche9154]

Thanks for very good information and fault finding

[@dannymatona3506]

Another excellent vid. Thankyou

[@stewartharrod1706]

Awesome video 💯💯💯

[@icetin7568]

great information many thanks

[@leewalters6467]

If I give it a thumbs up twice will it give this a boost Big D? 😆

[@tomkatgastraining]

I wish

[@simonmadahar5463]

Awesome TH-cam video 👌🏽

[@pookievision]

Find myself learning theory and sequence yet when im in the customers house it all goes out the window...put idea for vids in part 3 👍

[@MrReza21azer]

Excellent 👌👌👌👌🔥

[@monikanader9454]

Thank you👍👍👍

[@emmanueljouille7012]

very very good

[@hatemmimouni7015]

Thank you

[@AnEyeScream]

Thank you, Nikola Ditsov

[@ElTelBaby]

It would B GR8 if U went through different Boilers Manufactures Faults...
Starting with my Parents Boiler a Flexicom 24 HX
In particular the BAD Design of the Fan Mounting;... (take NOTE U Boiler disgners) that inhibits the Fan from reaching full speed;... making a noise;... then causing either F22;... F25 that does NOT reset after a short delay...
Where their system that runs on Constant;... for Old Ages occupants...
It would B GR8 if someone came up with a Auto Reset because on a manual reset once sorts it out;... for Weeks;... Months... But on the 1st fault;... in the meantime their Bungalow has gone cold...

[@Needdeen99]

Awesome

[@Needdeen99]

Is there a step by step guide you would suggest reading

[@MSKChess]

Sometimes the low water pressure switch, high limit stats etc are daisy chained together, is it not the case?

[@tomkatgastraining]

Some do some don’t like I say not every boiler is the same

[@MSKChess]

@@tomkatgastrainingLolz in other words READ THE MI you lazy bum engineers! XD

[@simonmadahar5463]

Could you do the same thing on a modern boiler?

[@tomkatgastraining]

Yep will do 👍🏻

[@stewartharrod1706]

Yes that would be superb

[@joaovittoria2533]

👍👍

[@samchappell233]

👍👍👍

[@farukadam1696]

👍

[@SuperWayneyb]

🤘🤓🤘

[@jon-paulward4580]

Jon-Paul Ward

[@groovejet33]

One thing I don't get?
The first part of sequence of operation is pump on and flow sensed? So why does ignition sequence start?
Obviously the pump doesn't disable or interupt the ignition sequence?

[@tomkatgastraining]

Low water dose but pump not running doesn’t

[@whynot6950]

It must send power to both pump and pressure sensor at the same time but only pressure sensor is essentially the switch to continue the sequence. My theory is firing dry could crack heat exchanger but firing wet with no circulation just causes stat to lock boiler out. Forgive me if I’m mistaken but the pressure sensor is just confirming the system is full of water not confirming circulation/flow and that pump is working.

[@groovejet33]

@@whynot6950 makes sense, thanks m8

[@snigie]

There is not flow sensor/pump proving on this boiler. The boiler relies on over heating if the pump is faulty and basically gives a dry fire fault (pressure sensor fault)

[@craighurst3599]

CH👍

[@steve250276]

steve ward

[@mikefahy4960]

Mike Fahy

[@Benji-gq9gx]

Why is the fault "water pressure" when you disconnected the pump?

[@tomkatgastraining]

Because the boilers low water pressure switch is only a switch that does high and low pressure and not no flow

[@Benji-gq9gx]

@@tomkatgastraining so is it because when the pump isn't working the heat builds up and this causes the water pressure fault?

[@tomkatgastraining]

@@Benji-gq9gx in this boiler but some do have a pump proving as part of the low water pressure switch

[@Benji-gq9gx]

@@tomkatgastraining so if they have pump proving I imagine the fault code would actually be "pump not working" or similar rather than showing a water pressure fault?

[@tomkatgastraining]

@@Benji-gq9gx correct

[@michaelwilson7061]

bonehead truckers theme