Question about Rinnai Heating & Cooling
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This noise is due to clogging of the heat exchanger blower fan. First turn of the breaker and have the power off for the entire unit. You can find the blower-fan is located in the lower central area of the unit There is a spring clamp securing the black rubber accordian-like tube to the fan. There are two screws that secure the fan to the unit. there are two plugs that connect to the fan, as well as a third air-flow sensor that should be removed. then you can look at the fan unit, as well as the grill on the underside of the heat-exchanger that should be cleaned. Also if this does not reduce the noise then try adjusting the hightemperature settings and mix valve also needs to be reset. Note both are adjustable.
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Posted on May 31, 2010
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Posted on Jan 02, 2017
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