Frigidaire FMOS1746BS Repair

Over the cooktop, 1.7 cu ft

FMOS1746BS is an over-the-range microwave with a stated size of 1.7 cu ft. Check the label and the paperwork for the series. A microwave mounted above the range does two jobs, cooking and venting, which is why its fan and filters matter as much as the magnetron.

Faults that appear

• Runs but food stays cold
• Turntable does not rotate
• Exhaust fan noisy or silent
• Cooktop light dark
• Door does not latch, so the microwave will not start
• Display on but keypad unresponsive

If you see sparking inside, stop using it. Our microwave sparks guide explains the usual causes.

Mounting notes

These units hang from a bracket under the cabinet and plug into an outlet in the cabinet above, so removing one is a two-person job. A fan can strain if the grease filters are loaded. Whether the unit vents outside or recirculates matters for diagnosis, so mention it.

What we check

Service begins with the door switches, because a latch fault can mimic a dead microwave. Then comes the high-voltage side, which only a technician should touch, followed by the fan motor and the control board. An owner should never open the case, because stored energy can remain after unplugging.

Checks you can do

• Look at the cabinet outlet and the breaker
• Clean the grease filters and clear the vent grille
• Wipe the door seal and latch area
• Try a cup of water on the turntable to see whether the plate spins

Venting and filters

Check whether the unit exhausts outdoors or recirculates through a charcoal filter, since the answer changes how often the filter needs attention. Grease filters on the underside slide out and wash easily. A loaded filter makes the fan strain and the unit run hot, so a regular wash cuts down on service calls.

Cooking habits that protect it

Cover foods that splatter, never run it empty, and keep metal trim or foil away from the walls of the cavity. Those habits reduce arcing and extend the life of the magnetron and the turntable parts. If something sparks, stop at once and unplug the unit.

Next

We diagnose, then give a written estimate, and you approve before anything changes. Read Frigidaire microwave repair and Frigidaire microwaves. The bigger sibling is the FMOS1846BS.

Frequently asked questions