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I have a York Diamond 90 laying down sideways in my attic.

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Hello,I have a York Diamond...
Hello,I have a York Diamond 90 laying down sideways in my attic. Between the cream colored Diamond 90 unit and a silver colored box with a "Refrigerant Evaporator" sticker, there is air coming out from the underneath where the two meet up. It seems excessive to lose all that AC cooled air in the summertime, is there any way to avoid this or is this normal?Some of my vents do not seem to have enough air flow coming out of them, so I closed them so most of the air comes out the 2 bedrooms occupied at night.I've taken some pictures and a small 20 second video to show how much air is coming off one side. I'm assuming the other side has a similar amount of air exiting.Thank you.
Submitted: 2 years ago.Category: HVAC
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Answered in 3 hours by:
2/14/2016
HVAC Technician: gotoman for ac, HVAC Technician replied 2 years ago
gotoman for ac
gotoman for ac, HVAC Technician
Category: HVAC
Satisfied Customers: 5,358
Experience: 51 years of experience install design and repair of all makes and models of AC
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The joint between the furnace and the Cooling Coil should be sealed with tape. Most are just screwed together without sealing joints. Silver aluminum tape works the best. This could be one of the reason you are not getting enough air. Russ

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HVAC Technician: gotoman for ac, HVAC Technician replied 2 years ago

If you would attach photos be glad to look and evaluate. Russ

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Customer reply replied 2 years ago
https://youtu.be/J-bfVyt1MlE
HVAC Technician: gotoman for ac, HVAC Technician replied 2 years ago

Coil and furnace are uneven. Need to level coil and furnace. Does not look like a good seal. When you have an opening that size between coil and furnace it can actually suck air from attack into duct work. You need to seal your ducts with tape and you can buy a bucket of Mastic duct seal you can paint on seams and it will seal duct. Russ

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HVAC Technician: gotoman for ac, HVAC Technician replied 2 years ago

Lowes and Home Depot sell the duct mastic sealer. You just brush it on. Russ

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Customer reply replied 2 years ago
Would you be able to provide me the instructions for opening up the coil box, what not to do or be careful when opening it up? I've opened up the diamond unit, but never the coil box since it is sealed with aluminum tape.
HVAC Technician: gotoman for ac, HVAC Technician replied 2 years ago

Just remove aluminum tape. Should be 5/15 or 1/4 screws that hold the front on the coil. Remove screws and panels will come off . You will see a V shaped cover when you take off panel. It will be held on with screws. Remove screws and you can remove the V shaped panel by sliding it down toward furnace. This will expose the inside of coil for inspection. If it is dirty spray with water let it soak and take a nylon stool brush and clean coil. Make all strokes with the fins. I am almost positive it is dirty with gap you have in the ductwork. Russ

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