Leaking Fridge Hi, Thanks so much for your feedback. We did as you said and there wasn't any ice on the pipework but at the back of the freezer build up. We defrosted the freezer and ran hot water through and everything looked promising, however 7 days later there is ice build up at the back of the freezer and it is making a strange noise. There is no leaking of water at this stage. Any more suggestions. Thanks.

Leaking door seal, putting warm food in the freezer, or defective defrost timer or heater.

https://www.google.com/search?q=massive+ice+build+up+on+back+wall+of+my+swan+fridge+freezer

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The problem is caused by the failure of either the defrost thermostat or defrost heater. In any case, replacing both the defrost heater and the defrost thermostat is recommended, and that would solve your "ice in freezer" problem.

you have'nt given make or model nor if it is a frostfree type. i'm guessing it is a frost free type

remove rear panel inside freezer and you will probably see a build up of ice on the pipework. melt off carefully with a hairdryer and appliance should then work ok

if fault reoccurs, get back to me

probably the defrost drain blocked. remove back panel from inside freezer and melt ice off with hairdryer and follow up with hot water till water flows away freely.
you may find all the pipework iced up and if so you have a problem with defrost system.
an alternative way is to switch off for 24 hours and leave doors open

take back plate off inside freezer and see if there is ice build up on the pipework. if so, this prevents airflow and the fridge is affected first. melt off ice with a hairdryer and restart.
if fault reoccurs, you have a fault with the defrost system

remove the back panel inside the freezer and check for ice build up on the evaporator pipework. if ice build up, this prevents air flow and hence temp rises.
remove ice carefully with a hair dryer and it should work. if problem comes back, you have a problem with the defrost system and get back to me if you want

don't know your make or model so this is general. also bear in mind i am in UK not US so may not be familiar with your appliance
back plate i refer to is inside freezer and is usually held in with a few screws or plastic clips. it is normally easily removable. you will then see evaporator pipework and fan.
there are many arrangements but the usual is a single fan at the top. this fan is used to drive cold air round the freezer with some of the cold air going to the fridge.
the usual problems are.
fan jammed by ice build up - this can be preceeded by a noisy fan when the blades are hitting ice
excessive ice build up on the evaporator pipework which causes poor airflow and hence temps rise. a temporary cure is to melt the ice off with a hairdryer

take backplate off and let me know what you find

not the seals. the drain is blocked. take the rear panel off inside the freezer and yoy will probably see an ice build up at the bottom. melt off with a hairdryer and follow up with hot water till water flows away freely. if you have ice build up all over the pipework, then you have a defrost system fault and get back to me

there is a fan inside freezer behind back panel. if pipework behind panel is covered with ice, it will prevent air circulation and the fridge is affected first

take back panel off and check for ice build-up and that the fan is working

remove back panel of freezer. check if there is excessive ice build-up preventing air flow. if there is, then defrost carefully with a hairdryer (with appliance switched off) if no ice or frosting on pipework, check if compressor is running. if it is or hot to the touch or clicking, then you have a compressor fault and replacement is not diy. if compressor not running, then probably module fault