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-   -   Evaporator is not properly sealed (

blessme 07-01-2013 09:33 PM

Our ac evaporator had the two ac lines. One goes and the other goes out. The holes that the a line go through are not properly sealed. So cold or hot air is leaked if the hvac system is running. It does not look like a difficult task to seal the holes. But i dont know how to seal the holes. Like what material i have to use...please if you know help me...

qbert 07-01-2013 09:49 PM

silicone or electricans "thumb gum" or cork tape will work

gregzoll 07-02-2013 07:36 AM

If you are talking about where they enter the ductwork for the A-Coil, yes it is normal to have a small gap there, to allow them to move and not rub against the duct, which would create a hole in the lineset.

I just use Aluminum tape around them to close the hole, so that they can still flex a little if there is expansion or contraction. Helps if you post a picture showing how large of a hole you are dealing with.

blessme 07-02-2013 08:46 AM

I cant post a picture here. The holes are on the side of evaporator. One hole at the higher position is about 2- 3 centimeters wide and the one at the lower position is about 1 centimeter wide. Ac copper lines go through the holes if the casing to get to the coil inside the casing. Unfortunately these holes were never sealed by the installer. Cold air is leaking out of these holes. So the air is leaking through the space between the casing hole and the ac tube.

Aluminum tape may work for both of the holes?

gregzoll 07-02-2013 09:44 AM

That small of gap does not matter if the unit is in the basement. If it is in your garage or attic, you want every gap sealed.

In a basement if it is being conditioned with vent and supply from the unit, you mainly waint ductwork taped at the joints, to keep the majority of air supply in the ducts.

I really would not worry about that small of gaps around the lineset, where it enters the Plenum for the A-Coil.

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