Hi just installed another Rinnai tank-less hot water heater. I am having an issue with this unit. The hot water pressure coming directly out of the unit is very low. The cold water pressure coming into the unit is more than adequate. I checked then inlet screen filter, looked clean. The unit also shut off twice with an #12 error code. The gas pressure is good, incoming cold water pressure good, venting right through the wall so that's not an issue.

I will be calling Rinnai tomorrow but wanted to see if anyone else has had the same issue.

Thanks in advance for your replies.