How to Troubleshoot & Replace Whirlpool AP3119957 / 819043 Defrost Drain Heater- Probe

Replaced the defrost heater, defrost thermostat and added the heat probe to counter any potential issues. 

Contacted a pro for advice, within a couple of days I received an answer from the pro, with a solution. I followed the advice and ordered the item recommend, After receiving the item I installed it (although the instruction was not the same as my setup I was capable of improvising this and completed the repair) And guess what IT WORKED yea................... Thanks to the PRO team Justin D. 

Replaced the relay as it had slightly smoldered insulation edges. But then it turned out the fan motor (evap) had burned out, because the fan blade had shifted on the motor axis until it got blocked by a screw. Replaced evap motor and fan blade and everything works again! As the new fan blade now has a metal strip preventing unduly shift, this should never happen again (or in other words the original fan blade was of faulty design.) The heat probe I'd ordered because about 3 months ago the freezer drain got clogged by ice buildup. This piece actually requires calm nerves to install as you have to take apart almost everything around the defrost heater and then wrap the aluminum around the defrost heater electrical insulation tube without breaking it. Time will tell if this now helps avoiding drain blockages. 

I bought a replacement Icemaker and Heat-Probe. The disassembly was a two-fer since I would have needed to remove the Icemaker to take out the back panel to access the defroster heating coil to mount the Heat-Probe. The most time consuming part was the removal/replacement of the frozen foods and thawing the ice buildup on the freezer floor with a blow dryer and making sure the drain was free flowing. 

Replaced it