Megaflow , a bit confused

[billybongo]

I am looking at a megaflow that runs out of hot water quicker than it was .
I have megad both immersion heaters / stats and they read 19 ohms which is correct.
They both have a 230v supply . so i am confused as by all accounts they are ok.
Age of cylinder approx 7 years , thanks for any thoughts . Mark

 

[ecowarm]

Could be lime scale arround elements if in hard water area

Eco

 

[BLOD]

swap the stats over

 

[BLOD]

oops hit post before I finished typing,
swap the stats over - sounds like top immersion & stat is working fine and giving about 1/3 of the hot water you usually get.
Bottom stat could be iffy?

 

[billybongo]

Thanks for replies , we are in a hard water area but it has an electronic descaler on the feed , thats not to say it could be furred up.
Will try stat swop and if push comes to shove will take them out to look at them . cheers mark