I replaced the light bulbs but they still do not come on and the vent fan will not come on either?

The support page with free manuals is here.
http://shared.whirlpoolcorp.com/product_literature/search_results.jsp?searchTerm=MMV5208WW1&siteCd=WHRCOM&userType=Consumer

The owner's manual says:

Cavity light: The cavity light bulb is located behind the vent
grille at the top front of the microwave oven, under the bulb
cover, and is replaceable. Remove two screws on the vent
grille, tilt the grille forward, and lift it out. Open bulb cover and
replace bulb. Close bulb cover, replace vent grille, and secure
with screws.

Cooktop light: The cooktop light bulb is located on the
underside of the microwave oven, and is replaceable. Remove
bulb cover screw, and open the bulb cover. Replace bulb,
close bulb cover, and secure with screw.

To remove the grille, see my video at microwavecontrol.com.

The cooktop light bulb(s) is(are) located on the underside of the microwave oven, and is(are) replaceable. Remove bulb cover screw, and open the bulb cover. Replace bulb, close bulb cover, and secure with screw. Cavity light: The cavity light bulb is located behind the vent grille at the top front of the microwave oven, under the bulb cover, and is replaceable. Remove 2 screws on the vent grille, tilt the grille forward, and lift it out. Open bulb cover and replace bulb. Close bulb cover, replace vent grille, and secure with screws.
For more information, your owners manual can be viewed here (scroll to the bottom of page 4):
Maytag MMV1164WB Owners Manual Page 4

My Spacesaver bulb replaces from the top. You have to remove 2 screws that hold the upper vent cover. W/ cover off you will find a phillips head screw about the center that holds the bulb cover. Remove the cover screw & lift up & remove the cover, then replace the bulb, the cover & screw then put the vent cover & it's 2 screws back. There may be some variance but they are all similar.

We see and repair this a lot. The problem is on the control board, which we regularly repair for $39.95 nationwide.


This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

The lights can can be inoperable or stuck on or stuck in "night light" mode. Sometimes this will similarly affect the fan operation or inside light, too.


We'd also recommend buying top-quality bulbs.


They can blow if subjected to vibration such as door slamming or a weak floor, or electrical fluctuation, especially if they are cheap bulbs or they are left on all night.


Instead of having the board repaired, you can order a new control circuit board / smart board if that's economical, and since your sockets are bad, they will need to be replaced, too.


You can find links to helpful exploded view diagrams and part ordering help here. I recommend that you bookmark that link to your

favorites.


There's a YouTube video available showing how to remove a typical over the range control panel assembly in under 5 minutes.


If you're changing the board yourself, you'll need to detach the keypad connector:



Some connectors will have a lock.


We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

There is a varistor or thermostat switch mounted on the wall behind the control panel. I unpluged the leads and shorted them together. the fan and lights started working again. I got another microwave off freecycle.org for parts. I noticed a lot of sites tend to point to the control panel for a $36 to $100 board repair. Don't fall for it. H.G.

It looks like the part of your computer board on microwave which responsible for controlling light and fan stop working. In this case you have to replace computer board.

I’m happy to help further over the phone at https://www.6ya.com/expert/vitaliy_f406165329c75ede

Allways unplug when your working inside a microwave, you will most likely have to replace the bulb again and also the fan, or anything else that is damaged, you will need to inspect the microwave for broken parts.

Il get you a few links to repair parts.

We see (and repair) this a lot. The problem is on the control panel, which we regularly repair nationwide for $39.95 postpaid.

This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

This can often also affect the exhaust fan operation, too. The lights and fan can be inoperable or stuck on too.

Details of our service and critical safety information and disassembly information is at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

We're happy to help and we appreciate your thoughtful rating of our answer.

We see this a lot. The problem is on the control panel, which we regularly repair nationwide for $39.95 postpaid.

This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

This can often also affect the exhaust fan operation, too. The lights and fan can be inoperable or stuck on too.

Details of our service and critical safety information and disassembly information is at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

We're happy to help and we appreciate your thoughtful rating of our answer.

That would almost certainly be a problem on the control circuit board. If the bulbs happen to short / blow out or if they are removed or installed while the microwave is still plugged in, there is often an arc which causes damage to the board. We repair regularly these boards for such problems for $32.50 nationwide.