Frigidaire Refrigerator Thermostat Replacement Guide — Cost, Signs & DIY Tips

The thermostat on a Frigidaire refrigerator depends on your model generation. Older models with a physical dial (numbered 1–7 or 1–9) use a cold control thermostat — a capillary tube device that mechanically switches the compressor circuit. Newer models with a digital display and electronic buttons use thermistors and a control board for temperature management, with no traditional thermostat at all.

Before ordering a thermostat, determine which system your model uses. If you have a dial, you have a cold control thermostat. If you have a digital display, you have thermistors (see the sensor guide instead).

How the Cold Control Thermostat Works

The cold control is a temperature-sensing switch with a capillary tube (a thin metal tube filled with refrigerant or sensing fluid). The capillary tube runs from the thermostat body (behind the control panel) to a sensing point inside the fresh food compartment. As the compartment warms, the fluid in the tube expands, causing the thermostat contacts to close and starting the compressor. As the compartment cools, the fluid contracts, the contacts open, and the compressor stops.

The dial (1–7 or 1–9) adjusts the trip point — a higher number means the compressor runs longer (colder temperature). Setting 4 or 5 is typical.

Symptoms of Cold Control Thermostat Failure

• Compressor never starts — the thermostat contacts are stuck open. The compartment warms. Turning the dial has no effect
• Compressor runs continuously, never cycles off — the thermostat contacts are stuck closed. The fresh food section may freeze items. Turning the dial has no effect
• Clicking sound from the control area when turning the dial but no compressor response — the thermostat contacts click mechanically but are not making electrical contact
• Temperature does not change when you adjust the dial — the cold control mechanism has failed. Compressor behavior does not follow the dial setting

Testing the Cold Control

1. Unplug the refrigerator.
2. Remove the control housing cover (usually 1–2 screws inside the fresh food compartment near the light area).
3. Locate the cold control — it has the dial shaft on one side, a capillary tube extending from the body, and 2 wire terminals.
4. Disconnect one wire. Multimeter on continuity.
5. Turn the dial to the highest setting (coldest). The contacts should show continuity (closed).
6. Turn the dial to "OFF" — the contacts should open (no continuity).
7. If continuity does not change — thermostat contacts are stuck.

Cost

Replacement

1. Unplug the refrigerator.
2. Remove the control housing cover.
3. Disconnect the 2 wires from the thermostat terminals. Note positions.
4. The thermostat is held by a clip or screw. Remove and carefully extract the capillary tube from its routing (it runs along the compartment wall to the sensing point).
5. Route the new thermostat's capillary tube along the same path. Secure with the same clips. Mount the thermostat body.
6. Reconnect wires. Replace the housing cover and dial knob.
7. Plug in. Set the dial to 4–5 (mid-range). Wait 24 hours and verify temperatures.

Tools: Phillips #2, multimeter. Time: 20–30 minutes.

Capillary Tube Handling

The capillary tube is fragile. Do not kink, bend sharply, or crimp it. A kinked tube gives false temperature readings, causing erratic compressor cycling. Route it along the same path as the original, secured with adhesive-backed clips.

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