I am not sure the 3 way valve is faulty, but, here are the symptoms.
I first noticed the pressure gauge was not working properly, then it stopped.
Then I noticed the 3 way valve was not releasing water into the drip tray.
When I used some powder cleaner in the P/F it bocked the little hole in the cleaning disk.
The pressure built up so much I could not remove the P/F for some hours, it was jammed tight, The pump stopped pumping as the pressure was too high.
I tried a 50/50 vinegar solution many times, left it sitting overnight.
Sometimes the pressure gauge moved,
So I swapped the 3 way valved out with known good one, it was operating in another 6910.
No change.
I removed the brew thermoblock, made sure all the lines were clear, soaked the brew thermoblock in vinegar solution, blew out all the ports with compressed air, and re assembled.
No change.
Since then I have swapped the original non functioning gauge into a functioning machine and it works fine.
Makes good coffee!!
So, hope I have not missed anything in what I have done.
Do any of the EM 6910 experts have any pointers, I have wondered about the ecu, but not sure what to check.
Robin
I first noticed the pressure gauge was not working properly, then it stopped.
Then I noticed the 3 way valve was not releasing water into the drip tray.
When I used some powder cleaner in the P/F it bocked the little hole in the cleaning disk.
The pressure built up so much I could not remove the P/F for some hours, it was jammed tight, The pump stopped pumping as the pressure was too high.
I tried a 50/50 vinegar solution many times, left it sitting overnight.
Sometimes the pressure gauge moved,
So I swapped the 3 way valved out with known good one, it was operating in another 6910.
No change.
I removed the brew thermoblock, made sure all the lines were clear, soaked the brew thermoblock in vinegar solution, blew out all the ports with compressed air, and re assembled.
No change.
Since then I have swapped the original non functioning gauge into a functioning machine and it works fine.
Makes good coffee!!
So, hope I have not missed anything in what I have done.
Do any of the EM 6910 experts have any pointers, I have wondered about the ecu, but not sure what to check.
Robin

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