trying to put a new defrost heater in my kenmore side by side...cant remove the old one or install the new one..it seems like it should come in from the bottom or side but there does not seem to be enough room or flexibility to get it in or out...i got the right hand side of heater out on the side beteen evaporator and heat shield but the left hand side was too tight and did not want to break evaporator coils so i did not force it..model number is 106 59582990...cant drop it in either due to the thin sharp fins which run front to back on the evaporator..neal