Why is my tankless water heater making a squeaking noise?
An intermittent, high-pitched squeak coming from a tankless water heater is often tied to external factors like recent utility work or internal component issues. This noise makes it difficult to know whether the system requires professional attention or a simple check before calling a plumber.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1calling a plumber
- 2Turn it off
- 3Check if the hot valve is open all the way
In their words
Unedited, most upvoted first, each linked to the thread it came from.
“Water heater has begun squeaking (Sounds like a bearing)”source ↗
“Don't know if it's relevant but the city fixed a leaking/broken line near my house today and in the early afternoon I begun hearing a squeak that sounds like a bearing.”source ↗
“It's intermittent. Sometimes it goes longer, other times it stops pretty quick.”source ↗
“I know nothing about plumbing obviously but is there anything I can do to assess it before calling a plumber?”source ↗
“It's a high pitch squeak”source ↗
“It is tankless and you might not be able to see due to all the junk but nothing is obstructing it or leaned against it”source ↗
Where this came up
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