while attempting to remove the water damage ceiling, I removed the 4 bolts inside that clamp the A/C unit to the roof. Well one of the rear bolts snapped off. <br>What are the chances of the unit remaining water tight with only 3 bolts holding. I would have to remove the unit to try and make repairs to the broken off bolt/nut...and not sure how I would accomplish that.<br><br>Any ideas???