SubZero 690: Frost builds up on ice chute flapper door

Check the flapper for the use chute it may be stuck or broken allowing room air to migrate in to freezer

I need you to confirm your model number. Is MZD2665HE correct? The problem is very likely a broken 12565502 Dispenser Door Spring or more providing you have the correct model number. There may be a kit if the model number is different.Thanks, John Tripp Appliance 911

The problem your having is that the door in the dispenser chute isn't closing completly and warm air is coming in, clashing with the freezer and the moisture in the warm air freezes and collects right there in the chute causing the ice build up. The more common parts that may cause this is the door flapper being bad or damaged, flapper soleniod, which helps the flapper doofr get a good seal, and electronic board on the dispenser itself.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/jason_4570d45317834dd3

I am not sure but I think you have a bad door gasket in the freezer. This allows ambient air to come up through the chute.
Good Luck,
Gilshultz

This sounds like your ice may be melting and freezing around the chute. You may need to replace that rubber gasket on the chute. Otherwise, if you use a lot of crushed ice, that will build up badly on the chute and you can manually clean that off. I hope this helps you!

The flap door where ice is dispensed is warped letting warm air into the freezer causing the frost build up. You must replace the flapper - a $5 - $7 part but not too difficult to replace. I find the flapper last only about 2 years and frost problem reappears. Forget about a "weak heater".

yes,you need to pull the front panel on the ice maker off to get to the solinoid that opens and closes the flap,with the flap vranked open you are letting cold air out and warm air in and that makes frost,if you don't want to try and fix it your self put a cloth towel in the chute to block the air lose and call an honest local appliance repair person-mike

most flaps have a solinard that opens and closes the flap,if you can replace or get in there to lube it you should me ok,let me know more-mike

This would indicate a problem with the ice chute door seal. Have it serviced. Air leakage would cause the frost-ice buildup.

first check would be to see if the flapper door is closing all the way in the dispenser area. best way is to remove the ice bucket and shine a flashlight from the front up into the disp door area and look for light around the door from inside the chute.

another check would be to make sure the door delay mechanism is connected an not allowing the dispenser door to close to fast trapping a cubes in the door and causing an air leak in the chute..

Keep in mind if you use alot of crushed ice frost build up is faster than with just cubed.