I have noticed lately the smell of holding tank in the cabin when driving, it was extremely windy one day it happened, the other time not so windy but both times going up and down mountains seemed to trigger this. I have a Hurricane 27k and have about 6000 miles on it and this a new problem. Also, it happen after I had emptied the holding tanks. I am going to look for cheater valves and check the one on the roof, if anyone has other ideas let me know! I was wondering if the p traps lost water going up the grades..
Thanks
Peter
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