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Discussion Starter #1
I have Trane air handler Model # 4tee3f40b1000aa that makes a high pitch whirring noise and is most noticeable at the 80% speed. When the Dealer came out he said the whirring noise is beacause the return duct is not supplying enough air. What would you recommend to solve this problem?
 

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if the return was too small .. he should have increased the size or added return when he installed the furnace..Is the filter clean ?? Remove your filter & see if it makes the noise
 

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When you remove the filter or take off the air return grille the whirring noise stops.
 

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How do I make that happen? Can I just change to a grille that allows more air to the return duct?
 

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add a return or enlarge the 1 you have... Again , If the installer told you it was too small.. Why didn't he enlarge it or add to it when he installed the unit ?
 

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Discussion Starter #7
The installer did not tell me the air return was too small. I called and complained about the whirring noise and they sent out a technician who said the air return duct was not getting enough air. The technican recommend adding a larger grille. I am waiting for installers manger to give me a call about solution to the problem. Thanks for the information.
 

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Hi. I had the dealer out and he cut out a whole in the box the air handler is mounted on and then put a grill there. They described this as adding a return. Was this a reasonable solution?
 

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Hi. I had the dealer out and he cut out a whole in the box the air handler is mounted on and then put a grill there. They described this as adding a return. Was this a reasonable solution?
Did the hole rid the whirring noise? What size hole was made? This does not sound like a proper fix to the noise.­­ Just my 2¢ worth.
 

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Hi. I had the dealer out and he cut out a whole in the box the air handler is mounted on and then put a grill there. They described this as adding a return. Was this a reasonable solution?
Where is the air handler located? Is it in a conditioned area?
Key1
 

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The hole is about 6x14 and did get rid of the whirring noise. The air handler is in a closet off the hallway.
 

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The hole is about 6x14 and did get rid of the whirring noise. The air handler is in a closet off the hallway.
Is the system a heat pump? Is the new return for just the closet area? How big is the closet? And does it have a louvered door to allow air in from outside the closet area?
 

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Hi. I had the dealer out and he cut out a whole in the box the air handler is mounted on and then put a grill there. They described this as adding a return. Was this a reasonable solution?
I am a homeowner who has worried a lot about having enough return. While your new return is not elegant, I think it may be OK. Returns are a lot less rocket science than other parts of HVAC.
 
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