I have a Westinghouse 199k btu residential tankless been installed 5 years without issues. (WGRTNG199) Over the last winter I had some cold showers as it was brutally cold and was told by Westinghouse support that the inlet temp was too cold and the unit was protecting itself from freezing. No error codes or anything on the unit. While that was part of the issue I then found the blending valve had started to leak so I replaced. That didn't fix the issue and finally support said I needed the matching new main board to go with it. OK, that solved the problem just as the extreme cold snap was lifting so who knows what the real fix was. Support also mentioned that this unit should not be installed for the extreme lift in central Wisconsin and suggested to install a small unit to pre-heat the inlet temp to keep it warm enough to allow main unit to work better. I was monitoring inlet temps as low as 38F at times during the cold snap and that is low enough to trigger the shutdown.
So, 1st question is any suggestions on a small electric tankless I can pipe inline to lift my inlet temp about 15 degrees to confirm the inlet temp to the main unit is always above 45F? I've looked at single faucet sink units but my concern is trying to plumb those with 3/4" pipe to keep my flow acceptable in the house.
2nd question, I'm getting some sporadic cold showers already and it isn't close to cold yet. Maintenance is up to date, no error codes but getting a cold shower at times multiple in a day. I then unplug and reset and then all is fine for a couple days. Anyone have similar experience?
So, 1st question is any suggestions on a small electric tankless I can pipe inline to lift my inlet temp about 15 degrees to confirm the inlet temp to the main unit is always above 45F? I've looked at single faucet sink units but my concern is trying to plumb those with 3/4" pipe to keep my flow acceptable in the house.
2nd question, I'm getting some sporadic cold showers already and it isn't close to cold yet. Maintenance is up to date, no error codes but getting a cold shower at times multiple in a day. I then unplug and reset and then all is fine for a couple days. Anyone have similar experience?