Usnthedog
Jun 29, 2025Explorer
Tankless heater over heating
Furrion tankless water heater heats water to 144 degrees when set for 124 degrees. I lowered setting to 115 degrees and it heated to 136 degrees. We are traveling in the deep south and I thought it was due to the higher water temperature but I'm not sure. Stange thing is if you only turn on the hot water the temp stays at 115 but if you turn on the cold water it heats to 136. I tried to change the water flow valve at the heater but it won't move and is on max. Do I have an issue?? I fear over heating the water tubes and having a blow out. Is the issue in the heater control or the heater unit? Since I'm on the road now I'm reluctant to get aggressive with control valave. Thanks, Jeff.