I have a Milwaukee MA957 CO2 Regulator, Solenoid, Bubble Counter combo that is about 18 months old. I have been running the same one on another tank for 2 years with no issue. In the last month I noticed the the newer one stopped letting out CO2. The Apex is running correctly and the outlet turns on and off as expected.
If I open the needle valve a bit, CO2 comes out (because the outlet is on), the PH drops and eventually turns off. When the outlet cuts on again, the CO2 does not. Tweaking the valve repeats the process. I'm assuming there is an issue inside the solenoid related to the valve? I have not tried to take one of these apart so I'm not sure where else to debug or if I've narrowed down the problem and just need to get an entirely new setup? Thanks for any help in advance.
If I open the needle valve a bit, CO2 comes out (because the outlet is on), the PH drops and eventually turns off. When the outlet cuts on again, the CO2 does not. Tweaking the valve repeats the process. I'm assuming there is an issue inside the solenoid related to the valve? I have not tried to take one of these apart so I'm not sure where else to debug or if I've narrowed down the problem and just need to get an entirely new setup? Thanks for any help in advance.

