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Immersion heater rattle

Krusty_Clown · 2020-08-11 10:39:35

Hey there, had our 20+ year old water cylinder/immersion heater replaced around 7-8 months ago, when we were getting our bathroom refit. Worked fine over winter when heated from gas boiler, but during the summer, we've been using the immersion to heat the water in the cylinder. About 20-30 minutes after turning on the…

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11-08-2020 11:39am

#1

Krusty_Clown

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Hey there, had our 20+ year old water cylinder/immersion heater replaced around 7-8 months ago, when we were getting our bathroom refit. Worked fine over winter when heated from gas boiler, but during the summer, we've been using the immersion to heat the water in the cylinder. About 20-30 minutes after turning on the immersion, we're getting a lot of loud rattling from within the cylinder (doesn't happen when water is heated from gas boiler). The thermostat appears to be working fine and isn't an overheating issue (rattling starts within 30 minutes of turning on the immersion heater). Doesn't seem like it could be a hard water issue and the tank is very new so scale-buildup is unlikely. Can't really bring the bathroom installers back (other side of the country), so I'm wondering if there is some way to diagnose the issue, so I can figure out if its a plumbing or electrical issue. The immersion heater on/off switch seems to get very warm. Thanks!

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