The problem, a siemens 3 port valve 3pmp-v22. The hot water part workedOK but the heating part didn't, the switch that controls the actuator, I think
that is that little green thing had burnt out. What ever, it had stopped doing
it's job.
This model of valve and actuator come all as one, which means you haveto drain the system to change the valve.
The old valve conected to the system.
The vew valve, a siemens cmv322 complete valve actuator. This modelhas a removable actuator, it can be removed without disturbing the
rest of the valve or draining the system.
Above the actuator detached from the valve, note the four spring clips.
Above the valve with the actuator detached.
The new valve connected to the system. A slight mistake made but putright later.
All back together and working perfect.All ready for the next cold spell.
How did you change this part? I fix cars for a living and it looks quite easy except for the electrical side and draining the system. Any tips?
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