HEAT LIKE S24 Compact service HELP

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Hi guys posted this thread couple of days ago
What's involved is a full service for this type of combi?, and it's not condensing just only "combi only"?
Looking at the MI's only state how to remove cover and DHW, C/H fault mode!
Was talking with the tech team at Vaillant on Monday and they've emailed me a more detailed one of MI'S but not a lot of service specs AGAIN
Looking inside it looks very similar to the Heatline Vizo 24/28 In which the installation and service specs are much more to detail of how to carry out the service!!
Have any of you guys not noticed this or MUST have worked on In the past??
Tbh don't really want much to do with as I've just managed to replace faulty pressure switch and advised about getting it serviced and now wished I'd kept mouth shut.
Have had two of these boilers over past 3hree days..?
Any help would be much appreciated.

 

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Sorry. HEAT LINE S24 Compact.
And hopefully this is in the right forum here!!

 

[stevetheplumber]

usual checks gas pressures and rate open up clean out check flame picture leakage fga

 

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Carried out tightness test 1st all good with 24mbars standing. Not really doubting being under gassed! Just weren't able to do this from the meter as the flame was lifting off then shuts down.
All that's okay it's running.
But as that I'm a little weary about fixing the leaks as it looks like a rusty risk around flow pipe, diverter and air vents
Cheers Steve