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Path: utzoo!watmath!clyde!cbosgd!ihnp4!zehntel!tektronix!uw-beaver!ssc-vax!wanttaja
From: wanttaja@ssc-vax.UUCP (Ronald J Wanttaja)
Newsgroups: net.misc
Subject: Re: Furnace Fan Noise
Message-ID: <250@ssc-vax.UUCP>
Date: Sat, 8-Dec-84 01:03:57 EST
Article-I.D.: ssc-vax.250
Posted: Sat Dec  8 01:03:57 1984
Date-Received: Mon, 10-Dec-84 06:32:54 EST
References: <414@hoxna.UUCP>
Organization: Boeing Aerospace Co., Seattle, WA
Lines: 20

> I had a similar problem with furnace fan noise. The solution is to reduce
> the speed of the air circulating fan. 

Sounds like a good suggestion to me.  Don't worry too much about less heat
output- the instructions for our furnace state to ADJUST the fan speed until
air of the specified temperature is exiting from the ducts.  The slower fan
speed allows the more heat to be transfered to the plenum air.

One thing to be wary of, however, is overheating the plenum.  Our furnace 
has an overtemperature cutoff, which pops a circuit breaker if the plenum
temperature gets too high.  We had that problem when we first moved in.  
The furnace would cycle just find holding a temperature, but if you moved the
thermostat higher, the furnance would run for while, then pop the breaker when
the plenum overheated.  Thereafter, the furnace would cycle 2 min. on, 2 off,
trying to get the house temperature up to the thermostat setting, with the
overheat reset killing it as soon as the plenum heated up again.  Once the
plenum cooled and the breaker reset, it started over again.

				    Ron Wanttaja
				    (ssc-vax!wanttaja)