Ronald B Tualatin , OR December 10, 2016 Appliance: General Electric Microwave PVM2070DM1WW Ge Microwave Pvm2070dm1ww: Oven appeared to operate fine except no heat seems is a common failure mode. How to replace Assembly. Replaced the HV diode first then the Magnetron. Advice: check multiple sources to learn OEM part numbers and search/shop based the OEM part numbers. Had I purchased the exact GE part numbers I would have spent $35+ on a $5 Diode and $150 on a $75 Magnetron. I must add I have a background in electronics and mechanics and as a DYI'er was confident in my cross reference knowledge and part selection. If you don't have the experience to know the difference a call into support before purchasing parts is advised. Bottom line: our 2007 $800 GE Profile over the range microwave is now fixed for less than $100 bucks and we did it ourselves thanks to diagrams provided and our DYI background knowledge thank you very much APP. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes