cindy g
New Member
We have a nortiz tankless water heater for about 10 months and recently the water temp has been just above lukewarm. We discovered yesterday by accident when trying to clean the water filter in the heater that the hot fixture in the laundry room (2 handles, one hot and one cold) and the hot side of the single faucet in the bathroom sink continue to run water but cold after we shut off the water supply to the tankless heater. We did not check the other faucets. There is no error code in the heater unit itself. I called the company and they said this is not a heater unit problem. Apparently there is a cold hot crossover somewhere in the plumbing. This is not a new house and there hasn't been any new plumbing work done recently except for the installation of the tankless heater about 10 months ago. Ther is no recirulation system either. I like to get some help in understanding this problem.
1) If there is a crossover at a faucet (which I read is a common cause), why is the whole house water temp affected?
2) Is this a easy problem to fix by any plumber? I know I have to get a plumber out but I am afraid that not every plumber knows what to do and I would be wasting time and money on this.
3) Is this going to require tearing down any structure?
4) Any advise on what we should do now?
1) If there is a crossover at a faucet (which I read is a common cause), why is the whole house water temp affected?
2) Is this a easy problem to fix by any plumber? I know I have to get a plumber out but I am afraid that not every plumber knows what to do and I would be wasting time and money on this.
3) Is this going to require tearing down any structure?
4) Any advise on what we should do now?
