2008H 15000 + hrs condo stuck at 13.0 not below maybe to 13.1. I changed bal membranes recaled bicarb and acid pumps, dear press and loading press is perfect, no flow errors no valve errors. Im a little stumped. any help would be great thanks

Is the machine in bypass at 13.1? If not someone may have changed the standard sodium. Seems as if you've done most everything except maybe a condo cell.

Is your heater on. Just wondering.

yes it is in bybass at 13 and the temp is right on at 36.7 to 37 and is set at 37

Place machine and calibration mode and check conductivity calibration.
When conductivity cell start failing you will see a decrase on conductivity reading.
You got to make sure that you conductivity is low for real.

Check BC Calibration....If you can raise that your condo will raise with it.

Had a similiar issue last year, the condo calibration would only go as high as 12.7 and would remain at that in dialyze mode. Swapped out the Function bd, which repaired the problem. Expensive though, you may try borrowing from a known good machine, however you'll need to swapp battery RAM, Being careful with those legs.

PB, try sensor board as well. I saw that once. But like stated before by Alex2 try to calibrate first.

im calibrating right now i will let u all know what i come up with thanks for all the help

recaled condo it is all good. still at 13.0 or 13.1. i will start checking the boards next this one will probably have to sit over the weekend. cant get into overtime (right JP) anyway any other suggestions would be great have a great weekend im puttin this one up for now

check the o-rings on the orifice if they are worn or completely gone this will cause this. also seen the white stuff in the drain or the drain port out of the back of the machine do this as well.

LA i will check both of those things tomorrow,at another clinic today, never thought of the the "GOO" causing this i have a horriable time with that stuff sometimes.

You may want to try erasing the cond cell calibration and then recal. The H machines sometimes seem to lock up and not accept the cal's when they have been calibrated several times.To erase the cal from the calibration screen move curser to what ever cal to be erased and press and hold the sodium button until cal the item is highlighted. This works on any calibration on a H. They say there's no way to erase cals on a K. That's why fresenius tells you to verify and only cal if needed to prevent this from happening.

You probably need a new RAM chip on the function board.

ok changed the oring on the orifice they were not totally worn but leaving a lot of black on my hands. Now machine is at 13.3 steady on jugs cant check on the loop until tomorrow. so i that might have been it but it is still lingering on the low side. so still wondering?????