Lilly for Model Number MH7140XFZ Whirlpool microwave over the range light is supposed to be 30 watts (model #MH7140XFZ). Whirlpool's replacement is 40 watts was sent to my Whirlpool appliance dealer "this is a substitute". This bulb turned my sockets "crispy" in a very short time. Now I have new sockets but cannot find a 30 watt bulb. Was told by one "official" Whirlpool parts dealer that Whirlpool had changed its mind and 40 watts was here to stay.
Answer Lilly, The bulb has been changed to a 40 watt bulb and is not available in the 30 watt. The part number is 8206232A. Read More... Answered by AppliancePartsPros.com | Monday, March 24, 2014