Customer called John the plumber out today because she has two tankless water heaters in the home and one isn’t working. Tankless water heater is giving off area code 15 (venturi gas valve). Customer had a company come out earlier today and unfortunately they were not able to resolve the issue. Technician gave the customer a few options and customer decided to replace the venturi gas valve. Technician also informed the customer that replacing this part doesn’t mean that another error code will pop up. The part will be ordered and ready to install next week Wednesday (9/17)