Samsung ME19R7041 1.9 cu ft over-the-range microwave (FS / FT / FB / FG / FW): quick sheet

Covers: Samsung ME19R7041FS (fingerprint-resistant stainless), ME19R7041FT (Tuscan stainless), ME19R7041FB (black), ME19R7041FG (black stainless) and ME19R7041FW (white), 30-inch over-the-range units with 400 CFM venting and sensor cook, about 2018-2019 onward (R model letter); retailers now list it as discontinued. Canadian ME19R7041FS/AC is rated differently (950 W out / 1,500 W in), so read the rating label.

Cross-checkedBrands: Samsung8 components

Samsung's most common budget OTR: 1.9 cu ft ceramic-enamel cavity, 4-speed 400 CFM fan, glass turntable, sensor cooking and a flat handle. Transformer-type high-voltage circuit is assumed unless a finned inverter board is found when the cover is off. Typical calls: no heat, dead or stuck keypad (SE), lights, vent fan noise and door switch failures.

Safety first

Microwave high voltage is lethal even unplugged: discharge the capacitor with an insulated tool before touching internal parts. All internal HV work is caution.
Never run the unit with the outer case off.
Turn off the breaker and unplug before removing the unit from the wall; it needs two people.
If the door, hinges or seal are damaged, do not operate the unit.

How it works

Pressing Start closes the relays that feed the high-voltage section: transformer, capacitor and diode drive the magnetron, which heats the food. The turntable motor and cavity fan run with it.

Three door interlock switches (primary, secondary and monitor) must all be correct; a stuck or failed switch can blow the line fuse or keep the unit from heating.

The vent fan above the cavity pulls cooktop air through the grease filters and exhausts it outside (ducted) or back through a charcoal filter (recirculating). It can switch on by itself when the cooktop below gets hot.

Sensor cook uses a humidity/vapor sensor to judge doneness; Samsung's microwave code list covers sensor, door and key faults (E-01, E-6x, SE).

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Official manufacturer documentation

Always confirm values against the tech sheet for the exact model.

OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work. © 2026 OnCall Tech. Original content; not a reproduction of any manufacturer document.Generic part photos (not of this brand): Over-the-range microwave mounted above a stainless electric range by Curtis Adams, Pexels License

Diagnostic guides for this appliance

Guide · Microwave

Over-the-range microwave vent fan turns on by itself or won't turn off

Most OTR microwaves have a heat-protection thermostat that starts the vent fan when the cooktop below heats the unit, and on that cycle the fan cannot be switched off until the area cools. Some models also run the fan during and after microwave cooking or link the hood to the cooktop. If the fan runs in a cool kitchen, right at power-up, or for hours, suspect a thermostat stuck closed, a welded fan relay on the control board, a stuck vent key or a shorted wire.

8 steps ~45 minmoderate

Guide · Microwave

Microwave keypad locked or in demo mode (keys dead, or runs but doesn't heat)

Two software modes cause many no-fault calls: control/child lock and demo (showroom) mode, which runs everything except the magnetron. Clear them with the model's key sequence before any high-voltage diagnosis.

6 steps ~10 mineasy

Guide · Microwave

Known issue: Whirlpool WMH53520 / WMH73521 over-the-range microwave internal arcing (2016 recall)

In August 2016 Whirlpool recalled about 15,200 Whirlpool microwave hood combinations, models WMH53520 and WMH73521 (CS, CW, CB, CE, CH) with serial numbers TR33500000 to TR34899999, sold January 2014 to April 2016. Internal arcing during use can ignite an internal plastic part. The published remedy was a free replacement microwave. Units of this age are still installed in many homes and rentals.

6 steps ~20 mineasy

Other microwaves manuals

Manual · Microwave

LG LMV2031 / LMV1831 / LMVM2033 over-the-range microwave: quick sheet

LG 30-inch over-the-range microwaves LMV2031 (2.0 cu. ft., suffixes such as ST, SS, SB, SW, BD), LMV1831 (1.8 cu. ft., ST, SS, BD) and LMVM2033 (2.0 cu. ft., stainless). Transformer-type (non-inverter) units with a hidden vent grille, glass touch controls and a turntable, sold roughly 2015-2022; most are now listed as discontinued. LMHM2237 (2.2 cu. ft., taller cabinet, ExtendaVent 2.0) is a different, larger chassis: the fault logic below still applies, but check its own parts list before ordering anything.

10 components7 common failuresLG

Manual · Microwave

Frigidaire FFMV1846V / FFMV1645T / Gallery FGMV176NTF / FGMV17WNVF over-the-range microwave: quick sheet

Frigidaire 30-inch over-the-range microwaves: FFMV1846V (1.8 cu. ft., suffixes VS, VW, VB, VD), FFMV1645T (1.6 cu. ft., TS, TW, TB, TD, TM), Frigidaire Gallery FGMV176NTF (1.7 cu. ft.) and FGMV17WNVF (1.7 cu. ft.). Transformer-type units with a bottom grease filter, 2-speed vent and a turntable, sold roughly 2014-2021 and now discontinued (FMOS-series replacements). Factory revisions are shown by the last letter of the serial model (for example FFMV1846VSA/VSB); parts differ between revisions, so always order by the full model number.

10 components7 common failuresFrigidaire

Manual · Microwave

Galanz countertop microwaves (compact and retro, 0.7-1.2 cu ft): quick sheet

Galanz-branded countertop transformer microwaves sold at big-box retailers (e.g. GLCMKA07 retro 0.7 cu ft, 700 W; 1.1-1.2 cu ft models). Galanz also builds microwaves sold under other brand names; check the rating plate.

7 components5 common failuresGalanz