A/C drawing air up sink drain.
Whenever we turn on the A/C, it's just a matter of time before the whole RV STINKS. It appears the A/C is pulling air up the waste pipes connected to the double sink. Under one sink there is a drai...
Forum Discussion
As already pointed out, check the air admittance valve under the sink.
Do you have basement a/c or roof mounted a/c? More likely to have this problem with basement air because of possible leaks in supply side duct connections.
It appears you do have an air leak to the outside from the supply side of the air conditioner. Air out the supply is equal to air in the return side. If air leaks out of the supply to the outside then the return side has to get the air someplace and the result is a negative pressure in the rv.
Do you have basement a/c or roof mounted a/c? More likely to have this problem with basement air because of possible leaks in supply side duct connections.
It appears you do have an air leak to the outside from the supply side of the air conditioner. Air out the supply is equal to air in the return side. If air leaks out of the supply to the outside then the return side has to get the air someplace and the result is a negative pressure in the rv.
