Water Heaters - Bosch tankless noise
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stevengould46
05-25-08, 06:55 PM
My Bosch tankless works great but it sometimes makes a whistling noise, like a train whistle. I wonder if it is related to the gas feed or the water flow. I ran the hot water in the sink, got the wgistling noise and then shut off the gas valve and the noise stopped. What's up?