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JVfromGrnBay 04-01-2021 05:42 PM

Tankless heater alarm
Several times recently I have heard an alarm from the tankless water heater control panel while I am showering. It is a series of 3 short beeps, repeating approx 7 times. It always stops before I finish my shower so I cannot see any warning light when I check the panel. Any ideas on what this alarm is indicating? 2021 GT 25 FBT

Bcc75 04-01-2021 06:00 PM

Do you turn the water off at the shower head and/ or turn the water almost off?
Either way you would have a minimal flow of water. The tankless heater has to detect a certain amount of flow in order to fire. If not enough flow is detected it will throw a ‘low flow’ alarm. I had this happen while showering and I had the water almost off. My wife was in the bathroom and saw the error code on the panel and I looked it up later. Sure enough that’s what it was.

JVfromGrnBay 04-02-2021 07:57 AM

Each time the alarm has sounded the shower has been at full flow. I typically take a "navy shower" in the trailer and the alarm has been in the rinse phase but yesterday it also sounded briefly in the initial soaping phase.

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