Where do I find the drain tube on a dometic dual therm rv air conditioner?

download it from dometic corp.

amazon has them

Normally, the condensate will drain out of the unit onto the roof and off the edge to the ground. Remove your cover inside (probably 2 screws) and tighten the 4 bolts you will find inside. If they are tight, go to your RV supply place and get new roof gasket. Remove the AC and insert the new gasket and resecure the AC to your roof.

Thanks for your question @ FixYa.com

It is probably low on refrigerant. You can only check this if you have a set of gauges. Otherwise, take it to an air cond company and they will check it for you.

Condensor fan at rear of unit may have a faulty relay sticking.

The clicking tells me the AC(hydro) power has been turned off to it. Check all breakers, and make sure if you have another switch on wall, to change from front, to back, or to both, that it is in proper position.

I had the sam problem, took the thermostat cover off and tightend and refastend the wires, so far so god

clean the filters and check the drain, to clear the drain run a jug of warm water down the pipe

On your cold side air coming in, does the ductwork have any insulation on it? Also The evaporator (front part, up where your filter is ) may have a plugged drain tube, depending on year make & model. Not uncommon for some to have a cracked drain pan as well. Your best bet may be to pull plastic cover off unit, then look on side of evaporator housing & see if you notice a tube sticking out side for drainage. It may be plugged if there is one there, use a piece of coated wire or similar and try cleaning it ou, carefully, don't ram it in there and hit coils too hard.. You can remove the 5/16" head screws that hold cover over evaporator, and pull that cover forward & have a look as well.

Could be the drain path is clogged.. Take the cover off & see if you can get it cleaned..