OEM vs Aftermarket Defrost Thermostat for Frigidaire: Honest Comparison (297216600)

Your Frigidaire freezer's running 24/7, the electric bill's climbing, and there's frost building up like you're hosting a miniature Arctic expedition. You've diagnosed it down to the defrost thermostat (part 297216600), and now you're staring at two price tags: $60–$85 for the OEM Frigidaire part, or $26.99 for an aftermarket replacement. Let's cut through the marketing and look at what actually matters.

Quick Answer

For a defrost thermostat, aftermarket wins on value without sacrificing reliability. This isn't a complex electronic board — it's a simple bimetal switch that either works or doesn't. One installer reported: "Freezer was running all the time and this part looks like it solved the problem. Very easy to install." Unless you're doing a warranty repair that specifically requires OEM, save the $35–$60.

Side-by-Side Comparison

When OEM Makes Sense

There are exactly three scenarios where spending double makes sense:

Your appliance is under manufacturer warranty. Using aftermarket parts can void coverage, and if you've got a bigger issue lurking, you'll want that protection intact.

You're a commercial operation with strict compliance requirements. Restaurants, medical facilities, and some rental properties have insurance policies that specify OEM-only repairs.

You're flipping the appliance immediately. Some buyers specifically ask about all-OEM parts during resale. It's psychological more than practical, but it can affect resale value.

That's it. For a component that fails due to simple thermal cycling — not complex circuitry — the OEM premium doesn't buy you measurably better performance.

When Aftermarket Wins

This is where real-world experience matters. Defrost thermostats fail because of electrical degradation over time, not manufacturing quality differences. As the common failure pattern shows: "Over time, the thermostat may develop electrical issues that lead to inconsistent performance."

The symptoms you're fixing — freezer running constantly, frost buildup, inconsistent temperatures — all trace back to the same mechanical failure: the bimetal switch stops opening and closing at the right temperatures. An aftermarket thermostat uses the same bimetal technology calibrated to the same temperature range.

One DIY repairer described the entire process: "Removed trays and back panel. Replaced thermostat. Reinstalled back panel and trays. Freezer works fine again." That's with an aftermarket part solving a "runs too long" issue.

You'll need a screwdriver. That's the entire tool list. The installation takes under 15 minutes even if you're being cautious. Another user confirmed: "Part was the one ordered and it arrived when promised. No complaints."

The aftermarket version replaces multiple OEM numbers (AP4374171, PS2350702, 216731000, 218673001), which means it's engineered for broader compatibility, not narrower tolerances.

Our Verdict

Go aftermarket. You're saving $35–$60 on a component with zero meaningful performance difference. The defrost thermostat is a simple switch — there's no proprietary technology here worth paying double for. Use the savings to buy a pack of freezer organizer bins or just keep it in your pocket. Your freezer won't know the difference, and neither will your food.

Frequently Asked Questions

Will an aftermarket defrost thermostat cause my freezer to stop defrosting properly?

No. The thermostat controls one thing: when the defrost heater turns on and off based on temperature. Aftermarket thermostats are calibrated to the same temperature specs as OEM (typically around 15–20°F for frost buildup prevention). If your freezer stopped defrosting with an aftermarket part, the thermostat itself is defective — something that happens with OEM parts too. Return it under warranty.

Can I use this part if my model number isn't Frigidaire?

Yes, if your model cross-references. This thermostat (297216600) works across Frigidaire, Kenmore, Gibson, Kelvinator, and even some GE and Whirlpool units. Check the compatible model list — it includes PS2350702, W10549851, LAT1000AAE, and dozens of others. The mounting bracket and connector are standardized across brands.

My freezer's running constantly — is this definitely the defrost thermostat?

Probably, but not guaranteed. A stuck-closed thermostat will keep the compressor running nonstop because it never signals the defrost cycle to end. However, a failed defrost heater, timer, or control board can cause identical symptoms. Test the thermostat with a multimeter (should show continuity when cold, open circuit when warm). If it's stuck in one position regardless of temperature, it's dead. If it tests fine, look at the defrost heater next.