Roof leak around air conditioner

I had the same issue last month, gave the bolts a couple turns and all seems good now

turbojimmy wrote:
The only way to do it right is to remove the A/C unit, and if you're going to do that you may as well replace the $20 gasket. If you try to caulk around it you'll just make a mess (BTDT).

But if you insist, I'd use an interior/exterior type door & window caulk. I've used it before and it peels off easily - at least off of my old-school aluminum roof.

Ditto.

Chances are good that the screws have worked loose. I've had that problem happen twice on the same rig, so the last time it happened, I put thread lock compound on the screws.

I had a Jayco that either the AC was installed with loose bolts or the bolts worked loose and caused a major leak. I pulled the AC off and could see where the water left dirt marks on the roof running under the gasket.

After cleaning the roof around the AC, I used the Dicor roof sealant on the bottom side of an new seal, effectively sealing it to the roof. Reinstalled the AC and tightened down the bolts to spec. Then I checked those 4 hold down bolts twice a season to be sure that they didn't work loose.

The AC bolts should be checked on your camper every time that the roof is inspected, which should be at least once a year.

Ernie