Model # FFMS183CS20 Official Frigidaire split room air conditioner

Here are the diagrams and repair parts for Official Frigidaire FFMS183CS20 split room air conditioner, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

Click a diagram to see the parts shown on that diagram.
In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Installation guide

Owner’s manual

Error Codes

Model diagram and schematic

SEARCH WITHIN THIS MODEL

ALL PARTS

Showing 10 of 22 parts |

#35

Recommended spare parts diagram

Motor

Part #5304502325

$240.11

In Stock

Qty

Recommended spare parts diagram

Compressor

Part #5304505770

$729.56

In Stock

Qty

#11

Recommended spare parts diagram

Valve

Part #5304483768

$54.86

In Stock

Qty

#28

Recommended spare parts diagram

Frigidaire control box

Part #5304505781

$553.69 |

$12.00 OFF Phone Price : $565.69

In Stock

Qty

#27

Recommended spare parts diagram

Terminal

Part #5304482856

The manufacturer no longer makes this part, and there's no substitute part

#17

Recommended spare parts diagram

Sensor

Part #5304505776

The manufacturer no longer makes this part, and there's no substitute part

#40

Recommended spare parts diagram

Lineset

Part #5304506134

The manufacturer no longer makes this part, and there's no substitute part

#21

Recommended spare parts diagram

Bulkhead

Part #5304505779

The manufacturer no longer makes this part, and there's no substitute part

#13

Recommended spare parts diagram

Bracket

Part #5304505773

The manufacturer no longer makes this part, and there's no substitute part

#14

Recommended spare parts diagram

Valve

Part #5304505774

The manufacturer no longer makes this part, and there's no substitute part

Symptoms for water softeners

Choose a symptom to see related water softener repairs.

View all

Why is my softened water salty?

Main causes: clogged drain hose, faulty rotor valve, leaky rotor valve seals…

Why isn't my water softener meter working?

Main causes: broken water flow meter, faulty timer, water flow to softener is bypassed…

Why does my water softener overflow?

Main causes: faulty brine valve assembly, bad rotor valve…

Why are water softener resin beads in my water?

Main causes: broken resin tank screen, bad resin tank seals, cracked upper distributor in resin tank…

Why isn't my water softener using salt?

Main causes: salt bridge inside the salt tank, bad timer, valve motor failure, faulty rotor valve, clogged venturi…

Why is there no display on my water softener?

Main causes: lack of electrical power, bad power transformer, faulty timer…

Why isn't my water softener softening my water?

Main causes: empty salt tank, salt bridge, depleted resin, clogged or damaged venturi, broken rotor position switch, fai…

Why does my water softener leak water?

Main causes: loose water line connections, cracked water-carrying components, bad rotor valve seals…

Repair guides for water softeners

These step-by-step repair guides will help you safely fix what’s broken on your water softener.

View all

How to replace a water softener venturi

The venturi valve in your water softener draws brine water from the salt tank to the resin tank for regeneration. Follow…

Repair difficulty

Time required

15 minutes or less

How to replace a water softener rotor position switch

The rotor position switch detects the position of the valve rotor. If the rotor position switch fails, follow these step…

Repair difficulty

Time required

30 minutes or less

How to replace a water softener timer

The timer is the control board you use to program the water softener. If the timer isn’t accepting commands when you pus…

Repair difficulty

Time required

15 minutes or less

Articles and videos for water softeners

Use the advice and tips in these articles and videos to get the most out of your water softener.

View all

Model # FFMS183CS20 Official Frigidaire split room air conditioner

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Symptoms for water softeners

Why is my softened water salty?

Why isn't my water softener meter working?

Why does my water softener overflow?

Why are water softener resin beads in my water?

Why isn't my water softener using salt?

Why is there no display on my water softener?

Why isn't my water softener softening my water?

Why does my water softener leak water?

Repair guides for water softeners

How to replace a water softener venturi

How to replace a water softener rotor position switch

How to replace a water softener timer

Articles and videos for water softeners

How to read a wiring schematic video

How to use a multimeter to test electrical parts video

How to clean a water softener

Parts & More

Stay Connected

Quick links

Let us help you

More resources