during defrost cycle water dripped into freezer and froze all over ice bin

First I removed the ice maker. Second I removed the back panel and overhead panel above ice maker. Third I pulled down the drip trough it had a styrofoam base under it. The trough heater had to be unplugged to remove the trough as well as the drain hose. Forth I seperated the styrofoam from the trough and peeled off the old heater which had burn marks on the foil. Fifth I applied the new heater plugged it in and attached the drain hose to the trough. Last I reassembled the unit. Refridgerator works great now and it only cost $45.00 for the heater. The GE repair service quoted over $950.00 and did not list the trough heater as the problem so I would be spending more and would have required several repair visits.