>>2971389
those are the ribs showing due to malnutrition

>>2971389
the metal has heated and then constricted.

if he was just an advisor doing an inspection he may be correct.

if he was trying to sell you a service or replacement chances are he was trying to scam you.

only real way to know is to open it up... which should be done every few years anyway to inspect the burner and clean out any debris.

Engineer hasn't had Worcester Training. Worcester say this is fine.

Although it is a sign that the boiler has been reaching high temperatures.

Make sure you get a full strip down and clean service.

Change burner seal, refill expansion vessel.

Boiler looks quite old. Can you post the serial number? Be interesting know when it was manufactured.

is this one of those inline on demand heaters whats the huge pump looking thing and why isn't the water reservoir surrounded with a mass of insulation

>>2973057
>is this one of those inline on demand heaters
Looks like it, yes.

>whats the huge pump looking thing
Gas fired heat source. 'Pump' is a draft inducing fan.

>and why isn't the water reservoir surrounded with a mass of insulation
Not a reservoir. There's a tubing coil in that can. Not much water stored in the tubing, so not much heat to lose.

>>2973197
sounds complicated
whatever happened to just sticking a heating element and a thermostat into an insulated reservoir of water

>>2973210
This takes up less space.

>>2973838
just make reservoir small like a backpack and slightly powerful element sure it'll take 30 secs instead of 5 secs

>>2971390
AHAHAHAHHAHAHAHSHSHHSHS

Someone poisoned it with arsenic

>>2973210
>just sticking a heating element
That implies electricity. OP has a gas fired unit. Gas is (typically) much cheaper than electrons.