Hi, I have an older refrigerator, (Hotpoint #HSS25GFTA WW); that is staying in defrost mode for too long. It is causing my frozen foods to thaw somewhat and also causing my ice cubes to melt and clump together. I recently had my heating element replaced for the second time in a year and the repairman said the new element would fix the issue. I kind of figured it had nothing to do with the defrost problem but I'm not a repairman! Does anyone have an idea of what could be causing this? Is it a part that I could replace myself? Thanks in advance for any help offered.