Tankless hot water heater not delivering water for more than a couple minutes
We just moved into a newly built house, and the plumbing issues are unbelieveable!
We have an AO Smith 510 Tankless water heater. It took 15 minutes to get hot water to the master bath sink our first morning here. The Master bath is the room closest to the tank. We placed the heater purposely so we’d get water there the most quick. But not only did it take 15 minutes, but the hot water only lasted a couple of minutes, then went ice cold for 2 minutes, then hot again, and again only stayed hot a few minutes.
And the shower – well, that sure was fun. Took about 2 minutes later in the afternoon to get hot water, so I got into shower, but then about 5 minutes later, lost the hot water completely. When my wife showered several minutes later, she managed to have hot water for the entire shower. But we could not adjust the water temp of the shower – the knob from the fixture that adjusts temp came off in my hand.
Then today it was even worse. I turned on the hot water in the master bath, but after 40 minutes gave up trying to get hot water. Went upstairs and ran the hot water, and a few minutes later, we had hot water up there. After about an hour of hot water running elsewhere in the house, we finally had hot water in the master bathroom. And the “hot” water in the kitchen never got beyond lukewarm, except for about a minute of hot water.
This is absolutely ridiculous. This is an expensive, new, custom designed house. Our neighbor next door, hearing of our issues, timed his hot water – the FURTHEST point in his house had water in 35 seconds first thing in the morning. Same hot water heater. I cannot conceive of having to replumb the house, but I am afraid that may be necessary. The house was already double the estimated build time, and I’d hate to move out after just moving in. But I want hot water!
Oh – and a brief By The Way – one of our NEW toilets run. And the A/C is messed up too. 10 degree difference from one room to another. This is a really “great” builder. BUT I DO NOT KNOW WHAT I CAN DO AT THIS POINT! ☹