MSD 2454GR* Maytag double door. This is my 2nd email. I manually defrosted the inside coils and it worked for several days. Freezer temp 0 & ref. temp 40. Today ref. temp climbing above 45 and coils again frozen. Both fans running at same time when defrosted. Coils outside clean. How do I test to see which part is bad? I understand it could be the heater, the temp sensor. Or the timer. Maybe several of these. Several months ago a repairman replaced a part but now I don't know which part. Thanks for you help. Gene Lanzl in New Braunfels, Tx. 78132. Ps. We are on small fixed social sec. income or I would again call the maytag person.

Find the timer manuely turn it to defrost ir the heater turn on change the timer if not replace heater and themostat assembly