The rinse aid dispenser in my frigidaire dishwasher model fmp330rgs0 seems clogged. When I pour in the liquid it won't drain into the chamber and the 'window' that shows if rinse aid is in the chamber does not show that any rinse aid is going in. Is there a way for me to fix this myself?

SOURCE: Rinse Aid does not dispense

http://www.partselect.com/ModelFrames.aspx?ModelID=149370&ModelNum=PDB2600AWX&mfgModelNum=&ManufactureID=1&Selected=54869&Position=1&mfg=Maytag&Type=&Mark=3

From diagram RINSE AID & SOAP DISPENSER, replace PS138912
Wax Motor for Detergent Cup Actuation.

SOURCE: Dishwashing detergent in rinse aid compartment

not good there is no way to drain it out. you might be able to take the door apart and take off the rinse aid reservoir and clean it out

SOURCE: put rinse liquid detergent in dishwasher rinse aid compartment.

I did the same thing with my Maytag dishwasher, several times actually, before realizing I was putting blue dish soap in the rinse aid compartment which then wouldn't empty. Then my Maytag started making ominous noises during the rinse cycle (appliance guy said it was "cavitation" noise).

Appliance guy wanted to replace the whole detergent/rinse aid compartment but since he told me the noise was probably caused by the dish soap stuck in the rinse aid compartment, I decided to try to get rid of it first. Here is the method that worked for me; it took most of a day but saved me parts & labor:

1. Get some white vinegar--I used nearly a quart.
2. Fill the rinse aid compartment to brim with the vinegar (overfill) but don't put cap on
3. Raise the dishwasher door slowly until the vinegar drains into the lower part of the chamber (at least this is how my Maytag worked)
4. Agitate the contents as best you can by rapidly shaking the dishwasher door up & down.
5. I also used a small plastic medicine dropper jammed into small openings on each side of the rinse aid compartment to agitate the vinegar by squeezing air into them.
6. Drain the compartment by closing the dishwasher door (move it to full vertical)--vinegar will drain into the bottom of the dishwasher.
7. Repeat above steps a couple times, then fill again w/vinegar, put the cap on and let it stand for awhile. Then drain and repeat the whole routine several times.
8. Blue-colored vinegar will come out which is a good sign (or whatever color your dish soap was).
9. After awhile, I started pouring generous amts of very hot tap water thru the rinse aid compartment, alternating with white vinegar. (No reason you can't use hot vinegar also.)
10. Eventually, all the blue stuff came out & the see-thru levels of the rinse aid compartment were completely clear/empty.
11. Run the dishwasher (I decided to not put any rinse aid in). I got some overfoaming (from the washed out soap) the first time I ran it which I probably could have remedied by adding more vinegar & possibly salt, but the noises were gone!
I just ran the cleaned out dishwasher a 2nd time & it was back to its quiet self with no overfoaming.

Takes some patience but hey, beats a big repair bill!!

SOURCE: Cannot unscrew cap on rinse aid compartment in door of Whirlpool Gold Quiet Partner III

the cap doesn't come off, you just have to open the door all the way. then, when you pour the rinse aid into the dial area, it will get sucked into the dispenser. but if the door isn't open all the way it won't go anywhere and will overflow on you.

SOURCE: Dishwasher rinse-aid dispenser not working

the film is caused by hard water. go to www.dishwasherfilter.com. they have a product out for this exact problem. works amazing every time and is very affordable.