Price Match Guarantee
In-stock parts ship the same day
365-Day Return Policy
Price Match GuaranteeGET PRO PRICING
Video & Articles: Appliance & Equipment RepairFrigidaire Microwave Oven Cavity Thermostat Replacement 5304519340 
Frigidaire Microwave Oven Cavity Thermostat Replacement 5304519340
Skill Level
Total Parts Cost
$30.11Estimated Savings
$112.5003:47
- Description
This video provides step-by-step repair instructions for replacing the cavity thermostat on a Frigidaire microwave oven (Model FPMO227NUFA). The most common reason for replacing this part is if the microwave is not cooking properly.
All of the information for this video is applicable to the following brands:
Frigidaire
All of the information for this video is applicable to the following brands:
Frigidaire
Step By Step Instructions
1
Frigidaire Microwave Oven - FPMO227NUFA
2
Frigidaire Microwave Oven High-Limit Cavity Thermostat Replacement
3
Tools needed: T-15 tamper-proof Torx bit, needle-nose pliers
4
Shock
5
Because of the high voltage and high current used by microwave ovens, be aware that repairing this appliance poses a substantial risk for injury or death if precautions are not taken.
6
You should always unplug the microwave before you attempt any disassembly.
7
Since high voltage capacitors used in microwaves may retain a charge even after the microwave has been unplugged, we recommend that only experienced professionals access and replace internal components.
8
Unthread the six rear screws securing the cover using the T-15 tamper-proof Torx bit.
9
Unthread the screw on the right side of the cover as well.
10
Sharp
11
Pull the rear sides of the cover out then lift the cover up and pull back to fully remove.
12
Shock
13
You should release the potentially stored electrical charge in the capacitor to avoid injury.
14
You can do this by placing needle-nose pliers with an insulated handle across each set of terminals.
15
Disconnect the wires from the cavity thermostat.
16
Use the needle-nose pliers to straighten the retaining tabs and you can remove the old thermostat.
17
To install the new high-limit cavity thermostat, align it over the retaining tabs then bend the tabs to secure.
18
Connect the wires to the terminals.
19
Reinstall the microwave oven cover by first aligning the top edge then the sides.
20
Thread and tighten the seven screws to secure.
21
Plug the power cord back in and the microwave oven should be ready for use.
Description
This video provides step-by-step repair instructions for replacing the cavity thermostat on a Frigidaire microwave oven (Model FPMO227NUFA). The most common reason for replacing this part is if the microwave is not cooking properly.
All of the information for this video is applicable to the following brands:
Frigidaire
All of the information for this video is applicable to the following brands:
Frigidaire
Step-By-Step Instructions
1
Frigidaire Microwave Oven - FPMO227NUFA
2
Frigidaire Microwave Oven High-Limit Cavity Thermostat Replacement
3
Tools needed: T-15 tamper-proof Torx bit, needle-nose pliers
4
Shock
5
Because of the high voltage and high current used by microwave ovens, be aware that repairing this appliance poses a substantial risk for injury or death if precautions are not taken.
6
You should always unplug the microwave before you attempt any disassembly.
7
Since high voltage capacitors used in microwaves may retain a charge even after the microwave has been unplugged, we recommend that only experienced professionals access and replace internal components.
8
Unthread the six rear screws securing the cover using the T-15 tamper-proof Torx bit.
9
Unthread the screw on the right side of the cover as well.
10
Sharp
11
Pull the rear sides of the cover out then lift the cover up and pull back to fully remove.
12
Shock
13
You should release the potentially stored electrical charge in the capacitor to avoid injury.
14
You can do this by placing needle-nose pliers with an insulated handle across each set of terminals.
15
Disconnect the wires from the cavity thermostat.
16
Use the needle-nose pliers to straighten the retaining tabs and you can remove the old thermostat.
17
To install the new high-limit cavity thermostat, align it over the retaining tabs then bend the tabs to secure.
18
Connect the wires to the terminals.
19
Reinstall the microwave oven cover by first aligning the top edge then the sides.
20
Thread and tighten the seven screws to secure.
21
Plug the power cord back in and the microwave oven should be ready for use.
Applicable Product Model
Parts Needed
Thermostat
$30.11
Total$0.00
Related Articles & Videos
04:41
Part Replacement
Frigidaire Microwave Oven Control Panel Assembly Replacement 5304519365
05:18
Part Replacement
Frigidaire Microwave Oven Door Release Push Button Replacement 5304519323
06:46
Part Replacement
Frigidaire Microwave Oven Door Interlock Switch Replacement 5304515182
05:26
Part Replacement
Frigidaire Microwave Oven Door Release Push Button Spring Replacement 5304519324
Our Story
Family-owned and operated since 1912, Burke America Parts Group is the longest-running genuine appliance, HVAC, and outdoor power equipment parts solution in North America. At Repair Clinic, we're proud to be an international brand trusted by the pros as well as the DIY community.
About Repair Clinic
© 2026 RepairClinic.com