noisy tankless water heater

noisy tankless water heater

by Rhonda Hurst
(Morrisville, PA, USA)

I am buying a house. During the inspection it was discovered that the water had been turned off. After the water was turned back on, the water heater was also turned on. After water had been running through the unit for a while (up to 20-30 minutes) and then turned off, the unit was making a lot noise. Normal because it had been turned off for a while? Or will it do this everytime it has to produced hot water?

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water heaters