Is there suppose to be suction from the return air duct to take out hot air

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Originally Posted by aaron128

Is there suppose to be suction from the return air duct to take out hot air

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It does not actually take out the hot air but it draws in the warm air so the evaporator/cooling coil can do its job by removing the heat and moisture and return the conditioned air back into the dwelling/business. Yes there will be a air draw into the return air opening.

Something very light like a tissue or paper towel held close to the return will show you if there is suction