How To Seal An Roof Top A C Unit

Contractor grade tapes seal out water to prevent damage to air conditioners and other hvac equipment mounted on roofs addison il august 24 2009 pres on the hvac industry s leader in adhesive gaskets and tapes has introduced a line of contractor grade curb tapes specifically designed to seal roof curbs to a c units preventing rain moisture and dust from damaging their increasingly sensitive electronics. An air conditioner installed on an rv typically sits on top of the rv unit. Remove the mounting bolts as well as the screws and bolts that secure the air conditioning unit s cover.

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The second part to remove is the outer decorative plastic cover located on the roof usually secured with a few screws.

How to seal an roof top a c unit.

You may also need to reseal an air conditioning unit if it has started to leak. With the plastic cover removed you should now be able to access the main evaporator and condensing unit. I used a new roof seal epdm repair tape solvent and self leveling. Main unit and cover removed and down off the roof with the power off disconnect the wire harness.

However after two hours of removing the old gasket which had sealant applied and held the ac unit to the roof top firmly i wondered if there was a step that dometic omitted. When a new unit has been installed it must be properly sealed to prevent leaks. The sealant held the ac unit better than the 4 bolts that dometic provides. The proper way to seal an rv air conditioner is to use a rubber compression gasket placed between the roof of the rv and the air conditioner.

Place the new gasket and reassemble the rooftop unit wiring and plastic housing. In this somewhat lengthy video i fix the leak at the a c in our 2006 sierra toy hauler. Remove the air conditioning unit placing it on its side and take out the sponge rubber gasket.

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