Gas Engineers > What is the correct procedure attending a boiler breakdown?

[Ibraheem]

Hi there guys i know this might sound like a silly question. I am a new learner (not qualified yet) and i just want to know the correct procedures on what you should do in an event of a boiler breakdown. For example lets say if the boiler is leaking... Do you Isolate water and gas to the boiler first? or do you have to do the usual let by and tightness test and then the other stuff?

 

[Riley]

Will really hinge on the fault reported

 

[Scott_1979]

I wouldn’t isolate the gas for a water leak no

It’ll come with experience, you can usually discount many of the parts based on the information given by the customer. That will dictate how you will approach the issue.

 

[Ibraheem]

@Scott_1979 @Riley thanks for the reply guys but lets say once you have have fixed the issue with the boiler. do you have to do all of the testing again like...

let by, stabilisation and tightness test?
gas rate?
Working pressures?
Co2 combustion checks?

if you get what i mean?

 

[ShaunCorbs]

depends what the fault was

lets say diverter leaking

i wouldnt do a

let by or tt
gas rate
working pressure
or fga test

i would do a visual check of the boiler
visual check of the case seals
and i would listen to how it starts up you can normally guess how its running

 

[king of pipes]

Think the guys have it covered on this one . Kop

 

[AMGasServices]

1 rule I’ve always followed is

Anything I do with out removing the combustion chamber it’s a visual only.

For example changing a Baxi 105e pump visual only not disturbed anything affecting combustion. Documented well because no one will help you when your standing in the doc. That piece of paper can be your get out of jail card.

If I was changing a pump on a Worcester 24i junior greenstar I’d do a gas rate and record flue analyser readings. Again documented well.

Only do a full tightness test when necessary. If you do a tightness test on every job you’re opening a can of worms.

BG started doing a tightness test on every job but scrapped it soon after.

Homeserve used to do a mini tightness test on the gas valve they scrapped that pretty quickly. (Only do it when changing a gas valve or see if it’s opening)

According to the old regs after a tightness test we had to purge and relight each appliance thankfully now it’s changed. Only purge and relight once you’ve let air in to the system from the furthest appliance away.

 

[Rob Foster]

Hi there guys i know this might sound like a silly question. I am a new learner (not qualified yet) and i just want to know the correct procedures on what you should do in an event of a boiler breakdown. For example lets say if the boiler is leaking... Do you Isolate water and gas to the boiler first? or do you have to do the usual let by and tightness test and then the other stuff?

There is one important issue here which sometimes gets forgotten. Go through with the customer what is wrong in their words AND then EXAMINE all the rest of the system as much as possible check for other unreported defects. Unscrupulous customers can try and load pre existing problems they know about on to naive fitters. Like you fix a diverter then find afterwards the timer is LALA but they will leave it with you. Generally people are nice and honest but some ...usually well healed ones
Can try it on, ones from Formby where I live are the worst ever for this In my opinion

 

[RoryD]

Regarding Gas, for me, follow the ignition sequence to see where it fails. For more complex problems do all the basics. Pressure, Gas rate, measure voltages and resistances. Never be afraid to call the manufacturers Technical helpdesk, they know their boiler.

 

[firemant]

depends what the fault was

lets say diverter leaking

i wouldnt do a...
gas rate
working pressure

26.9 ?

 

[ShaunCorbs]

26.9 ?

So you give an appliance a service after you replace a water part for free

In the real world no one does anything more than a visual

Unless theve changed something that would effect them

 

[firemant]

So you give an appliance a service after you replace a water part for free

In the real world no one does anything more than a visual

Unless theve changed something that would effect them

Who mentioned a service? You are REQUIRED to conduct the tests outlined in 26.9 whenever you work on a gas appliance. Or does repairing/replacing a diverter valve not count as working in a boiler?

 

[ShaunCorbs]

Who mentioned a service? You are REQUIRED to conduct the tests outlined in 26.9 whenever you work on a gas appliance. Or does repairing/replacing a diverter valve not count as working in a boiler?

Which is what a basic service is

Fga gas rate etc

 

[firemant]

Jeez. You may call that a service. You have no idea to what I am referring, do you?

 

[firemant]

(9) Where a person performs work on a gas appliance he shall immediately thereafter examine—

(a)​

the effectiveness of any flue;​

(b)​

the supply of combustion air;​

(c)​

its operating pressure or heat input or, where necessary, both;​

(d)​

its operation so as to ensure its safe functioning,​