We did some plumbing in a basement. Now we don't get any hot water in a few faucets. I tried draining all pipes to rid off any possible air lock but it's useless. It works sometimes but most of the time doesn't. We have tankless heater and technician has been to the house but couldnt figure out the issues.
Any ideas what went wrong? Anyone else has that issue before?
Do you have a mixing valve on the hot water heater? If yes, then sometimes those may be faulty or may need to be re adjusted to get the temperature back up to a maximum 120 degrees Fahrenheit. I would also say it could be the hot water heater that's not firing up when on demand and causing you to get hot water inconsistently. Or the temperature setting on the hot water heater is turned down too low and not supplying enough hot water when on demand. It could also be that whoever did the plumber might have crossed the water lines and mixed hot water with cold water and now it is effecting your hot water supply. Another possibility is that the hot water line somewhere is running through a cold air return or supply duct and causing the hot water to cool down before reaching the fixture. Unfortunately when it comes to situations like this there is troubleshooting involved until you find the main cause of the problem.
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