My tenant is complaining about the microwave suction fan not working. He is a new tenant and I am not sure if the suction is just simply weak or not working to the standards. I realize that the Microw

Convection needs fan drive to force the air into the oven cavity. The fan may be direct motor drive or belt driven. If the latter the belt may be broken or simply have stretched and come off.
Before removing the cover of the oven in attempt to carry out any maintenance such as replacing the Oven cavity lamp, make sure the oven is disconnected from the power point ! The voltages in a microwave oven ARE LETHAL !

https://www.appliancefactoryparts.com/microwaves/goldstar/mv-1310w.html

the filter needs a good cleaning

Check to see if there's a relay providing power to the fan. If there is, the contacts might be sticking in the closed position. Assuming that this is an over-the-range unit, disconnecting the vent fan completely might not be a good idea as heat/steam from foods cooking on the range would more likely damage the microwave.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_29ad5d1dd86564b0

probably a defective motor or slipping blade. i'm not sure how old your amana is. if it's the real old chrome metal '70's or early '80's vintage models, the part may not be available anymore.. they were very common to fail.

Actually, the fan in the microwave is only there to cool down the magnetron which cooks the food. It gets very hot over a period of time and the maintains constant temperature across it. Suggest you use an extractor to remove fumes.

This may be caused by a weak fan, improper installation, clogged filters, blocked air ducts, or a blocked outside vent.

Assuming yours is a Whirlpool, you can download Whirlpool owner's manuals and installation instructions here.

This will help you check the mounting and setup, as well as helping you check the filters to see where the problem lies.

Please write back with your brand and model number if you yours is not Whirlpool.

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

This is due to poor air flow, either to a blockage or a problem with the internal cooling fan or hood vent exhaust fan.

Are the grease filters or charcoal filter clogged?

You may want to check your owner's manual for info on checking the filters. Grease filters can be cleaned, but charcoal filters must be replaced about every 6-12 months.

The installation manual will tel you if there's some error in the installation setup.

You can download Maytag owner's manuals and installation instructions here.

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

The Intake is gentle. It is not designed to have a great pull of air from the Cook Top.

TEST: Turn Exhaust Fan ON
Hold a sheet of your printer paper up to the INTAKE GRILLE (bottom). Will the sheet of paper stay? Held up only by the suction? If it does, Air Intake is OK.