DIY Home Repair Forum: HVAC
04-10-2012, 07:06 PM
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Replies: 2
Views: 462
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DIY Home Repair Forum: HVAC
04-10-2012, 06:49 PM
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Replies: 4
Views: 394
rusted/clogged coil
If the coil gets blocked up every summer you might want to try a 4 to 1 mixture of lemon flovored clorox and water into the drain pan each summer. This will kill any residual mold in the pan and...
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DIY Home Repair Forum: HVAC
10-21-2010, 08:21 AM
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Replies: 12
Views: 3,756
wet filter
You need to find out why the filters were wet in the first place. There is no reason for moisture getting into the return ductwork.
There must be some air leakage in the return side for water to...
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DIY Home Repair Forum: HVAC
10-20-2010, 06:29 PM
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Replies: 6
Views: 2,258
dust
Slove the problem first!
Where is the dust comming from in the first place?
A proper HVAC system is a closed system - air is pulled across the filter where it is cleaned, goes to the unit where...
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DIY Home Repair Forum: HVAC
10-20-2010, 06:02 PM
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Replies: 6
Views: 938
design problem
An excellent rule of thumb for return sizing is filter length x filter width x 2 = capacity, so 20 x 25 x 2 = 1000 cfm and 18 x 18 x 2 = 648. You have a nominal capacity of 1648 cfm and a 5 ton unit...
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DIY Home Repair Forum: HVAC
10-20-2010, 05:44 PM
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Replies: 12
Views: 3,756
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DIY Home Repair Forum: HVAC
10-20-2010, 05:33 PM
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Replies: 2
Views: 1,404
insulation
if this is loose insulation in an unlined return, the return suction pressure has pulled the insulation in from the attic or walls. This means that your return trunk is not airtight and your...
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DIY Home Repair Forum: HVAC
10-20-2010, 05:22 PM
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Replies: 3
Views: 1,919
duct leakage
Assume that you have a 2 1/2 ton air handler that moves 1000 cfm of air.
Now assume that you are loosing 20% (200 cfm) of this air under the house thru duct leakage. 1000 cfm is being sucked into...
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DIY Home Repair Forum: HVAC
10-20-2010, 04:58 PM
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Replies: 1
Views: 397
burner shutdown
1) if oil filter gasket is not 100% tight air can get into the line and shut it down
2) same for all oil piping connections
3) cad cell could be getting weak
4) dirty/blocked oil filter
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