Lights and vent do not work

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.

Some have a plate on the interior of the oven that can be removed for easy bulb replacement but if yours does not you will have to remove the entire outer covering to access the bulb. If you have a combination microwave/Range vent you will have to remove the entire unit from the cabinet, then remove the outer cover, replace the bulb and re-install the combination unit.

WHEN THE BULBS BLEW THEY PROBABLY BLEW VIOLENTLY AND DAMAGED THE CIRCUIT BOARD THAT CONTROLS THEM MUST EITHER REPAIR THE BOARD BY REPLACING ,REPAIR OR REPLACE THE MAIN TIMER BOARD

How do I replace the light in the microwave oven? The light at
bottom or the counter light works but I cannot see what is cooking.

You can download owner's manuals and installation instructions for several brands (including Amana, Frigidaire, Jenn-Air, Kitchenaid, Litton, Maytag, Roper, Tappan, Thermador and Whirlpool) here.

Enter it as MMV1153WB0 (no dash, zero on the end, not "oh")

Or just get it here, to be more exact.
On page 4, it says:

"Installing/Replacing Filters and Light Bulbs
■ Grease filter: Grease filter is on the underside of microwave
oven. Clean monthly. Slide the filter away from the tab area,
and drop out the filter. To reinstall, place end of the filter into
the opening opposite the tab area, swing up the other end,
and slide it toward the tab area.
■ Charcoal filter: The charcoal filter is behind the vent grille at the
top front of the microwave oven. The charcoal filter cannot be
cleaned, and should be replaced about every 6 months.
Remove 2 screws on the vent grille, tilt the grille forward, lift it
out, and remove filter. To reinstall, place the filter into its slotted
area – wire mesh side up, replace vent grille, and secure with
screws.
■ Cooktop light(s): 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."

HINT: Unplug the oven before removing or installing the bulbs, or you may need this service.

You can find links to helpful exploded view diagrams and part ordering help here.

I recommend that you bookmark that link to your favorites. Hope this covers it.

William E. Miller
[email protected]
http://www.microwavedisplay.com

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.

The part that controls that is goes through your control panel on your microwave. For the lights to come on to start with the door being closed switches have to be working right and when you press start the lights come one. When the microwave is through cooking and you open then close the door then the lights should go out. The logic IC on the control panel board that detects all these events is not being reset correctly. Unless you get a microwave tech to track down the component on the control panel circuit board it is not something that you could do on your own since it takes voltage and signal checks with the proper equipment and then some soldering and desoldering of the defective component(s). Good luck and God bless.

The controller needs to be repaired. We regularly repair these control board assemblies for only $32.50 nationwide, and that's much cheaper than replacing the board. For safety, disassembly and other info see http://tinyurl.com/yzjozk

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.

Unscrew the vent at the top of the microwave(2 phillips head screws)
inside to the right you'll see another screw holding a metal panel. Unscrew this and take the panel off and you'll see the bulb, which will unscrew counter-clockwise