E521T how do I clear the drain for the freezer. Water is coming through the roof of the fridge below

Try blowing compressed air up the drain tube.

Have a look inside fridge compartment (especially the "roof", if it's a top-mount freezer) & see if you can see any ice build-up (look inside vents that allow cold air into fridge from freezer section. Also, if top-mount freezer, look inside the freezer compartment for ice build-up on "floor", inside vents, or on back wall. These symptoms, combined with water dripping from lots of the "roof" of fridge section (in a top-mount freezer model), can mean several different problems, so best to re-post with more info/symptoms included.
If there's no ice build-up (& the dividing area between fridge & freezer sections isn't particularly cold, which otherwise might indicate hidden ice build-up), it can be as simple as a plugged or obstructed drain tube, which is VERY COMMON. Easiest solution for this latter problem is to use a flexible plastic tube (think similar type as attached to aquarium air pumps), stuff it into drain hole, and blow on the other end. Sometimes you have to blow quite hard to clear an obstruction or complete blockage. If you can't clear the drain tube, it's likely a different problem. Again, a re-post with more info/symptoms will help narrow it down.

Red light on for High Freezer Temperature Warning
or freezer not cooling, but fridge is and a lot of noise from compressor.
Also, fridge drain hole blocked, water in bottom of fridge.

This is a common fault in Hotpoint Fridge Freezers and can also happen if the door has been left open or has been a power cut.

1. Turn off fridge freezer, or at least turn down the freezer temp to minimum, though not ideal.
2. Open freezer door and remove all drawers.
3. Remove the back panel on the inside of the freezer. This is held in place with 4 screws, which might be 6mm hex head or star allen head. Pull the panel out.
4. Behind where the panel was, there is a cooling element for cooling, pipes, and below this a temperature sensor. If the fridge freezer is not switched off, then fold together a few layers of tinfoil and wrap around the sensor.
5. Use a hairdryer to slowly melt the ice. Melt it around areas where it appears to be hanging on, such as the corners of the cooling element or bolts, as well as any thin sections below the main block of ice around the cooling element, which will be supporting the main block. Use a plastic ice scraper to remove ice but not near pipes or sensor.
Warning: Be careful using electrics around water & melting ice & drips.
6. Below the cooling element, there is a drip channel & drain hole. If this hole is full of ice, pour a small amound of warm water down, leave for 10 seconds and pour a bit more until clear.
In the fridge, clear the drain hole in the same way.
Warning: Do not pour a lot of water down, as this water drains onto a tray above the hot compressor at the rear of the fridge freezer to be evaporated by the heat of the compressor and the tray will only hold a small amount.
7. When all ice is removed, dry all moisture. Put the shelves back. Close door. Turn on fridge freezer. Turn up the freezer temperature to your normal setting. Turn on fast freeze if available. After 1 hour, check with a thermometer. It should be cold enough after 1 or 2 hours.

it is behind the plastic panel at the back of the freezer,usually just clips in and pulls out

Clear ice build up from drain plug using hot water in a syringe. Works well I just did mine. Located behind access panel inside fridge. Blue tube running down the back. Pull down and remove ice from the drain at the top.

Could be a clogged condensate drain. Since you did not give a model #, I will assume this has the freezer on top. When it goes into defrost, the water cannot go down the drain hose to the drain pan and accumulates as ice in the freezer, below the bottom liner and may drip into the fridge. Empty the freezer and open the fridge door. The open fridge door can help thaw the drain. Remove the screws holding the bottom of the freezer liner and remove the liner. If there is ice below it, the drain is clogged. Remove as much as possible by hand and then use a hair dryer to carefully melt the ice at the back of the freezer. Blot up any water from the melted ice and concentrate on clearing the 1/2" hole in the center back. That is the drain. When you think the drain is clear, check it with a large glass of hot water. This can be take some time. When done, reassemble, but also make sure the fridge is tilted to the back by adjusting the legs at the front bottom corners of the fridge. You may have to take the grill off the bottom of the fridge to do this. The legs screw down to lengthen them. Adjust them far enough down that the fridge door swings shut by itself. This will help the water down the drain before the fridge comes out of defrost, starts cooling and freezes it in the drain hose.

The evaporator coil is in the freezer. When it goes into defrost, that water should go down a drain in the freezer into the drain pan. Open the freezer door and see if there is any ice in the very bottom of the freezer compartment. If so, then the drain may be clogged and will have to be cleared. It is necessary to remove all of the racks and baskets to get to the sheet metal that covers the coil. Remove that panel to get to the evap coil and look below it to find the drain. It may be necessary to use a hair dryer to CAREFULLY melt any ice. Be careful not to melt the plastic liner. When you think you have the drain cleared, check it with a large glass of hot water.
If there is no ice in the bottom of the freezer, take the grill off the bottom of the fridge to see if there are any leaks under the fridge.
Could also be a pin hole leak in the water supply line to the fridge.

Hi, The drain hole located in the freezer defrost drain is plugged. Get me your model # and I can assist you further.

THanks
Vic

Drain stopped up.
Take out the bottom drawer in the freezer, look at the back wall and you should get a partial view of the bottom of the cooling coils. Directly below these coils is the drain area. You may need a light to see the drain hole. If this area is covered with ice then a hair dryer will help clear this so you can see the drain hole.
I have some O2 tubing that I put down the drain to clear any cloggs. Also, I seal the top of the drain hole around the O2 tubing with tape and use the air from my lungs to clear the drain tube. Pour a little water down this drain hole to make sure it’s clear.