The contact owns a 2022 Forest River Wildwood. The contact stated that the carbon monoxide alarms sounded while in the trailer. The contact and his wife opened up all the doors and windows as they both began to develop headaches and extreme fatigue. The contact and his wife went to the hospital; the contact's wife was treated for carbon monoxide inhalation and was placed on two tanks of oxygen. The contact's wife was released from the hospital the same day, the contact did not need any medical assistance. The contact purchased a carbon monoxide test and turned on the water heater; the tester indicated that the carbon monoxide level was at 100. The contact again aired out the trailer and took the vehicle to the dealer. The dealer used the carbon monoxide tester and their own tester; however, they could not duplicate the failure. The manufacturer was notified of the failure and was informed that there was no valid evidence that there were any defects with the camper. The camper was not repaired. The failure mileage was unknown.