Thanks for the advice John,
I thought about adding a second defrost limiter in series with the one already there in my fridges but I wasn't sure if it would be working or not and I had no idea about what kind of model I should be using... Since the defrost elements seem to be of higher wattage than what's used in most newer fridges, I wasn't sure if any newer limiter would be ok to do the job. I was also wondering if it would be safer to use a third limiter on the second cirtuit that goes to the solenoid that kicks back the defrost timer to the refrigeration mode once the limiter is open (before the timed defrost perod ends) or if there's no chance that this circuit could energize the heater due to a timer malfunction?
Also, I recently replaced the foam under the evaporator in my 1965 Frigidaire top freezer refrigerator and I wasn't sure if it would work. I couldn't find exact replacement insulation so I used a piece of styrofoam that I cut and melted in some areas to shape it similarly to the original so it would fit under the freezer floor and let the air flow through it and I used a can of foam for window insulation to seal the area around the evaporator drain tray. So far, it seems to work since there's no trace of water dripping in the refrigerator but I haven't used long enough to see if it will cause any problems... Is there an easier way to replace the foam in a freezer? How about bottom freezer units? I was amased to see how heavy the old foam remained, even a few weeks after I replaced it. It seems that no water had escaped from it.