I had a TT with same issue. RV Tech did have to remove and take back to his shop to clear obstructions in exhaust side - work fine after that. Need a different tech.
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RAM 22' DRW 3500 Crew LB 40 gal reserve tank / RETRAX Bed Cover / 2020 373RD HC / IS / MOPEKA Tank Monitor / Furrion Side&Rear Cameras
Slide Toppers / EMS-HW50C / Sailun 85's
3rd AC / Dometic 320
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