Like my Mom, I could drink coffee anytime and sleep the sleep of the dead. Now I, like my missus and many of our Pfizer vax'd friends, have developed heart arrhythmia. I cut out coffee, chocolate, alcohol, licorice and Omega 3 oil in capsules. And yes, life is still worth living. At a month shy of my

Old age. Chips suffer everything from infant mortality to senility

It could be a failing memory location. What happens if you set to 127 or 129?

You could try writing down all the settings, reset the PID to default and then re-enter your settings. Manual here: "BA_ECM_Controvento_02.2014"

The large end of the reducer should just fit over the vac break and the small end should not interfere with the centre valve

IIRC, it's a 1" to 1/2" copper reducer with a 3/4" end cap but it could be 1-1/4" to 3/4" w 1" cap. {image}

It could be the boiler fill solenoid. If it's not opening fully or clogged somehow it would slow both the open group and boiler fill rates. Or it could be a low flow rate on the pump. If you got some dirt or growth in the water tank, it could clog the inlet screen. Or if there is

That flow is about 2/3 of normal. {image}

It could be the bypass valve. Look at how much water is returned if you pinch the OPV return. The bypass valve should be brass and have the exit point straight up, not to the side as shown {image} You can also check how much water is pumped in 30s from an open group. It's possible the pump

4 more items, all of which I've experienced in ½c. Bad main breaker, bad panel connection, bad mains wiring to panel [squirrels], bad pole transformer [2 locations]