Cathy and Paula Posted May 30, 2018 Report Share Posted May 30, 2018 I have a leak that is coming out of the AC duct in the same spot as I had back in Sep. I had a new seal placed and have had no problems until now. It has rained several times since the new seal replacement with no leak. It has now started leaking again when it rains. I went up and check the sealant around the ac and touched up a few places and it still leaks. I also tightened the 4 bolts a little at a time but it still leaks. I checked the drain holes and they are not clogged. Should a seal leak after only 8 months? Should I tighten the bolts more and how much more? I have the 4 bolts on top of rv that hold the ac on. Most everything I find on seal repair shows the mounting bolts on the inside of the rv which once you take the cover off on the inside you can see where the leak is coming from. Any suggestions as to what I should do?? Thanks Link to comment Share on other sites More sharing options...
GlennWest Posted May 30, 2018 Report Share Posted May 30, 2018 Pull cover and check seal of unit. Not the bottom seal. If gaps are present, it will produce so much condensation, it will pull it into ducts. Now, if this is what wrong, water/condensate will be coming out the ducts, not the ceiling. Link to comment Share on other sites More sharing options...
Cathy and Paula Posted May 30, 2018 Author Report Share Posted May 30, 2018 It only leaks when it is raining so its not the condensation. Link to comment Share on other sites More sharing options...
GlennWest Posted May 30, 2018 Report Share Posted May 30, 2018 Most condensate during rain. I could be wrong, but do check for unit seal. If roof leak, may not be ac but somewhere else and running there. Link to comment Share on other sites More sharing options...
Ray,IN Posted May 30, 2018 Report Share Posted May 30, 2018 I once had a leaking roof unit. Turned out it was poor sealing between intake plenum an exhaust (cold air) plenum. Some metal duct tape stopped the exchange of warm/cold air. The cold air is under pressure and will over-power the intake(warm air) when leaking, condensing humidity there instead of outside within the roof unit. You must remove the ceiling unit to see and work on plenum leaks. My leak dripped onto the bed during days of high humidity, a rainy day qualifies as a high humidity day. Link to comment Share on other sites More sharing options...
GlennWest Posted May 30, 2018 Report Share Posted May 30, 2018 1 hour ago, Ray,IN said: I once had a leaking roof unit. Turned out it was poor sealing between intake plenum an exhaust (cold air) plenum. Some metal duct tape stopped the exchange of warm/cold air. The cold air is under pressure and will over-power the intake(warm air) when leaking, condensing humidity there instead of outside within the roof unit. You must remove the ceiling unit to see and work on plenum leaks. My leak dripped onto the bed during days of high humidity, a rainy day qualifies as a high humidity day. Fairly sure that Lifestyle has ducted ac. No ceiling unit. Link to comment Share on other sites More sharing options...
Ray,IN Posted June 1, 2018 Report Share Posted June 1, 2018 On 5/30/2018 at 1:42 PM, GlennWest said: Fairly sure that Lifestyle has ducted ac. No ceiling unit. The makup air must come from inside the conditioned room/RV or you will constantly be attempting to cool outside air instead of inside air. Since the delta is approx. 20 deg, the interior would never reach set-point unless outside air was within a few degrees of set-point. Thus a ceiling unit is required for every roof-top air conditioner to pull-in interior ambient air and chill approx. 20 deg. The Dometic 15.5K BTU roof unit on our 5er was ducted also, and it had a ceiling unit. I switched the Dometic ceiling unit for a Genesis Air Filtration ceiling unit, also made by Dometic. Link to comment Share on other sites More sharing options...
GlennWest Posted June 1, 2018 Report Share Posted June 1, 2018 Mine is ducted as well as my previous DRV, had no interior unit. Just supply and return ducts. Sure that Lifestyle is the same. We agree likely outside air getting to unit causing excessive condensate Link to comment Share on other sites More sharing options...
Cathy and Paula Posted June 4, 2018 Author Report Share Posted June 4, 2018 We pulled the ac and put in a new seal. We also found where the water was coming in. When we put the ac back on we discovered that one of the screws holding the ac down was stripped. We could not tighten it down and that would have been the side that the water would have been coming in. We covered that hole and drilled a new hole and tighten it down. We are hoping that we solved the problem. Link to comment Share on other sites More sharing options...
Kirk W Posted June 4, 2018 Report Share Posted June 4, 2018 35 minutes ago, Cathy and Paula said: We are hoping that we solved the problem. I would think that this should work. I haven't had that experience but I do know of a case where that same solution was used successfully. Link to comment Share on other sites More sharing options...
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