Mara X - No steam boost?

BH471

Hi Everyone,

I’m new to this forum but have been on the other forum in the past.

Basically I have a Mara X that is set to operate in steam priority ‘I’ mode and after nearly a year of faultless operation I now cannot get the steam boost to kick in. Just to be clear the machine warms up fine and then settles at a boiler idle pressure of 0.5-0.8 bar. Group head temp is correct on a thermometer but no amount of flushing engages the ‘steam boost’ anymore. Also, if changed to steam priority ‘0’ position this appears to be working correctly with an idle boiler pressure of 1.25 bar (temp setting ‘I’).

I have the option of sending the machine back to BB but obviously avoiding that would be preferable 👍

Thanks in advance.

DavecUK

BH471 You might be in luck if you have a V1 MaraX as any replacement Gicar box that’s upbto date would make it a V2.

From your description of symptoms, it seem likely the Gicar box may have failed. It could be the HX temp sensor as the other option.

BH471

DavecUK Thanks for the response. I have a V1 but with the black logo case I believe, bought the end of November 2021 before the V2 was released.

Send it back or buy some parts it is then …

DavecUK

If you buy a Gicar box, make sure you get the latest V2 one. Search around on the forum as there is a thread on it with a photo, showing how to identify. I just found the image I posted…this is the latest version.

I hope you were correct in your description and it’s not the HX sensor or a bad connection from same.