Noisy Rheem Criterion II. Blower speed too high.


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Old 12-05-08, 05:05 PM
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Noisy Rheem Criterion II. Blower speed too high.

Is there any way of quieting this 7 year old furnace (RGPH-10NBRJR). It is located off the hall in a closet like enclosure in a one story 4 bedroom house & when it runs there's a lot of low frequency rumbling noise. Also, the blower speed is too high compared to the furnace it replaced. The air flow sound coming from the vents is too loud. Blower hookup on the circuit board is:
Yellow - Heat
Red - Fan
Blue - M2
Black - Cool

Is there a different connection that would slow down the blower? Also, would insulating the enclosure decrease the furnace noise?
 

Last edited by donc28; 12-05-08 at 05:06 PM. Reason: spelling
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Old 12-06-08, 06:29 PM
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Originally Posted by donc28
(RGPH-10NBRJR).
Do you have A/C? What's the model and make?

in a one story 4 bedroom house
How many sq ft is the home, and where are you out of?


The air flow sound coming from the vents is too loud. Blower hookup on the circuit board is:
Yellow - Heat
Red - Fan
Blue - M2
Black - Cool
If you have A/C, I can't imagin what you hear in cooling!

Red-Lo
Yellow-Med-lo
Blue- Med hi
Black-High

Turn off the heat, and switch the fan switch on "ON".

Report back what the sounds is like for you.
 
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Old 12-07-08, 03:58 PM
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Originally Posted by Jay11J
Do you have A/C? What's the model and make?
No A/C. Furnace is a Rheem Criterion II Model RGPH-10NBRJR

How many sq ft is the home, and where are you out of?
2000 sq ft. I live in Camarillo, CA about 55 mi NW of LA


If you have A/C, I can't imagin what you hear in cooling!

Red-Lo
Yellow-Med-lo
Blue- Med hi
Black-High

Turn off the heat, and switch the fan switch on "ON".
OK
Report back what the sounds is like for you.
Sounds about the same. Slight whining noise but it's the air rushing out of the vents that's bothersome. Our bedroom is across the hall from the furnace & when it comes on (like last night) it wakes me up. Bummer. Old "inefficient" furnace was much quieter.
Appreciate your help.
 
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Old 12-07-08, 04:05 PM
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Ok, you for sure have an oversized furnace. Your winter temps seem mild.. 50's, and 40's?

How many supply vents you have in the home? I also forgot to ask how old the home is.

I'd would guess you could get by with a 45,000 BTU furance than a 100,000 BTU that you have now, and the blower in your model is very large blower that will move a lot of air.

Thanks goodness you don't have A/C, you'd be going up the wall.
 
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Old 12-08-08, 12:03 PM
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Originally Posted by Jay11J
Ok, you for sure have an oversized furnace. Your winter temps seem mild.. 50's, and 40's?

Yes. That's about right. Rarely does it drop into the low 40's.

How many supply vents you have in the home? I also forgot to ask how old the home is.

Eight vents & 2 of them I'd like to shut. Kids are gone.
House is 44 years old. Ceiling insulation blown in but no wall insulation.

I'd would guess you could get by with a 45,000 BTU furance than a 100,000 BTU that you have now, and the blower in your model is very large blower that will move a lot of air.

When this furnace was installed & turned on the curtains were being blown & besides being loud the velocity of the forced hot air seemed way excessive. Installer did reduce blower speed a little (not sure how) & said it couldn't be reduced further.

Thanks goodness you don't have A/C, you'd be going up the wall.
I turn the thermostat down to 60 degrees & use ear plugs! Should have refused to pay for this furnace when it was installed. The only good news is the furnace only has to run for a few months but when it starts running again (like now) the noise & high speed rush of hot air drives me nuts all over again!
 
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Old 12-08-08, 02:28 PM
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You could try changing the Red and Yellow wire around.. Red on Heat, yellow on Fan.

Furnace may over heat, but do take a temp reading before the furnace and after.

Keep all the vents open, you don't have enough vent for that large of furnace.
 
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Old 12-08-08, 04:14 PM
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Originally Posted by Jay11J
You could try changing the Red and Yellow wire around.. Red on Heat, yellow on Fan.

OK. What does this do?

Furnace may over heat, but do take a temp reading before the furnace and after.

Do you mean take a temp reading prior to changing Red & Yellow wire & after changing them? Where should temp be taken?


Keep all the vents open, you don't have enough vent for that large of furnace.
OK. I did that. A couple of them in the unused bedrooms were about half open.
I forgot to mention that the installers doubled the 31" X12" cold air return at the base of the furnace. Don't think any heat loss calculations were made.
 
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Old 01-14-09, 08:46 PM
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did it solve the problem?

I just chanced upon this thread.

I have the same problem. My details are:
a/c
YORK model H3RA060506G
furnace
model # GY9S120D20DH11J

When the furnace comes on (and the A/C) it is very loud. I haven't measured in decibels yet. The noise difference between the fan running and the heat mode is

The loft is about 1 yr old and has 8 registers (one on the mezzanine where the furnace is). One register barely gives off any heat. The return grille faces the mezzanine and is not ducted - the HVAC room is used as a plenum.

My circuit board connection right now is
Heat - Black
Hi Cool - Blue

I don't see an M-2 and another Cool connection :-(

Any way to quieten this beast down? Even on coldest days - when the furnace comes on, it reaches desired temperature in about 5 mins.

Thanks for any help.
 
 

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