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I get a high pitched whistle from my r94 rinnai. what causes this?

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It's generally caused by either low gas pressure to the heater. Or what is called a "Cold Burner". If it is a :Cold Burner" ... Once the whistling starts, turn the heater off, wait 3 to 5 minutes and turn it back on and turn the flames to a middle setting. If there is no whistling, set your flame height/temperature where ever you like. The low gas pressure issue would need to checked by a qualified technician. At the same time, have them to check the air mixture control valve on the burner.

Hope this helps solve your problem. Please let me know.

Posted on Mar 15, 2011

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