I have a 2022 Precept 34 G that I bought new in Jan 2023 and its equipped with a Girard GSWH-2 tankless hot water heater . We started to use the Precept in April and the hot water heater worked as it should at the set temp until a few ago . Now when use the shower after a few minutes the temp keeps rising above the set temp until we get the E3 error coded which I know is when it reaches a 140 degrees . We've tried lowering the set temp in the 90's but it keep rising . The water pressure is coming in to the unit around 45 psi .
Anyone have any idea what I should check and the possible cause ?
Anyone have any idea what I should check and the possible cause ?
