Re: sub-zero 500 series refrigerator door wont stay...
If Your Refrigerator's Freezer Door Pops Open When You Close the Fresh Food Door...If a 'top-freezer' refrigerator's freezer door pops open when the larger fresh food door's closed, it's actually a good thing. That tells us the seals are in great shape, sealing well. Some freezer door 'pop' is unavoidable bc the bottom door's so much larger than the top one and the hydraulic effect of compressing all that air kicks in. The two compartments share the same air via a duct between them, and that compressed air rushes up into the freezer compartment and can 'pop' the door. To improve the situation, apply a few drops of oil (sewing machine oil or 'three in one' - NOT WD-40) to each freezer door hinge pin. (Even better: if you can, pull the doors and coat the hinge pins with petroleum jelly). This will help the freezer door swing back closed by itself. The freezer door usually stays ajar because it's binding a bit, and that's usually caused by it's swinging 'dry', with no lubrication. It’s also a good idea to ‘kick’ the habit of letting the refrig door close hard.
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This model doesn't have a standard closure system for the doors, It contains a bar and string system under the doors, some parts may not be available currently but parts could be swapped from one side to the other, I have done it and it works. So you will need to inspect all parts to the door including bushing, gaskets and make sure the unit is square to the floor cause this will cause to door to pop open after closing it. Call Subzero for parts directly to fix this issue at 1-800-350-2676. They can and will point you in the correct dealer for you to get the correct parts you seek. Good luck.
There is defrost heater which comes on in defrost cycle. defrost heater stays on certain time(lets say 15 min), but lets think it came on to defrost and melted all ice of the coils during 5 min, but we still have 10 more min design for heater to stay on. if heater will stay another 10 min it will warm up your stuff in the freezer, so everything will start to melt. to get around this, all freezers have limit thermostat(defrost thermostat), when that thermostat feels heat from heater, it will shut power off to the heater, so it still in defrost cycle, but heater will be off for another 10 min. When that thermostat get stuck in closed position(does not shut power to the heater when all ice melted out), you will have defrost overheat. so most likely that defrost thermostat needs to be replaced. here is the video how i replaced it on subzero pro series.
This happens because the refrigerators of today are air tight, the fresh food door pushes the air into the cabinet as it closes and the air has no place to go but up the air vent into the freezer and "pops" open the freezer door. First thing is make sure the freezer door is capable of closing properly and is not rubbing or catching anywhere. I sometimes add a washer or 2 to the center hinge under the freezer door so it doesn't rub anything. Put a little Vaseline ( or food grade silicone lubricant ) on the hinge side of the seal. I then raise the front of the refrigerator so that the front of the refrigerator is a little higher than the back of the refrigerator. Never level a fridge with a level. Once you have the door closing properly and front slightly higher than the back...let the fresh food door close from 90 degrees on it's own and the freezer door may "pop" open a little but will close again on it's own...and stay closed once all is set up properly. We see this more often now and have no trouble with the door staying open again after setting up the refrigerator properly.
I understand thating you are having to problems with you refrigerator one the lights are staying on, second the fridge is not getting cold.
The lights are not turning off because of the light switch. The switch needs replaced it is located on the door jamb so that when the door closes the light goes off.
The secound problem is usually the fan located with the evaperator coil. This fan pulls the air thru the coil and pushes it into the fridge section. When the unit is running you should be able to hear the fan running in the back of the freezer. If the fan is not running the freezer will stay cold but the fridge will not recieve any cool air.
In order to get parts for Sub-Zero Refridgerators you must contact them at 1-800-222-7820 and they will send you to their authorized parts distrubitors.
The lower hinge on each door
may have a door closing cam. It raises the door up ¼ inch when opening and this
assist in closing the door. If it’s wore out and doesn’t work the door may not
seal and the gasket can be damaged. Watch the operation of the door to see if
it rises up when opened.
Just a guess, but I would check the gasket on the door. They can go bad or get distorted and bunch up and cause the door to bind and not close properly. Also check that the fridge is leveled properly. Will the door close if pushed? Will it stay closed?