So I’ve been happily using my Mara X since April this year and installed a serial to usb TTY cable into the gicar to monitor the brew temp sensor reading. Simply connected to my laptop and viewed in “putty” you can read out the boiler temp and target temp as well as the brew sensor temp.
In idle the brew temp is reading as it should, let’s say 92 degrees.
Now the problem…
As soon as I start to pull a shot this brew temp reading starts to rise to over 100 degrees and then starts to decline a little to the end of the shot.
Is this normal? I would think not but perhaps with the sensor location at the bottom of the heat exchanger path, maybe it is?
Just looking for validation to calm my concern that something is wrong, or not…?