How to Replace 134120900 Thermal Limiter on Frigidaire Dryer — Step-by-Step

Your Frigidaire dryer runs for 30 seconds, then clicks off completely. You restart it, same thing happens. Check the lint trap — it's clean. This exact pattern means your thermal limiter has blown. I've replaced hundreds of these on models like the AEQ7000CFE0 and AEQB6000ES0, and once you know what you're doing, it's a straightforward 20-minute fix.

What You Need Before Starting

• Phillips screwdriver
• 1/4" nut driver
• Needle-nose pliers
• Multimeter (optional, for testing the old part)
• New 134120900 thermal limiter

Estimated time: 20-30 minutes
Difficulty: Easy to Moderate

Safety First

Unplug your dryer completely before you touch anything. If it's gas, turn off the gas supply valve too. The thermal limiter sits on the heating element housing, and even though the dryer's been off for hours, metal edges can still be sharp. I keep leather work gloves handy for this exact reason. Don't skip the unplugging step — I've seen techs get shocked because they thought flipping the breaker was enough.

Step 1: Access the Rear Panel

Pull the dryer away from the wall so you've got working room. Remove the screws holding the rear access panel — usually 6 to 8 Phillips-head screws around the perimeter. On models like the AEQ8000CFE0, there's also a vent connection you'll need to disconnect. Slide the panel off and set it aside. You'll immediately see the blower housing and heating element assembly.

Step 2: Locate the Thermal Limiter

The thermal limiter is a small white or cream-colored rectangular device mounted directly on the heating element housing. It'll have two wire terminals. On Frigidaire dryers, it's typically on the right side of the blower housing, held in place with a single mounting screw. Don't confuse it with the cycling thermostat (round) or the high-limit thermostat (also rectangular but usually larger).

Step 3: Remove Wire Connections

Take a photo of the wire configuration with your phone before disconnecting anything. Pull the wire terminals straight off — they're friction-fit. If they're stuck after years of heat cycles, use needle-nose pliers and wiggle gently while pulling. Don't yank or you'll tear the wire. Remove the mounting screw holding the limiter to the housing bracket. The old part should come right off.

Step 4: Install the New Thermal Limiter

Position the new 134120900 thermal limiter exactly where the old one sat. Thread in the mounting screw, but don't overtighten — you're screwing into thin metal and can strip it easily. Push the wire terminals onto the new limiter until you feel them click into place. Compare your installation to the photo you took earlier. The wires should sit flat, not twisted or pulling at an angle.

Step 5: Reassemble and Address the Root Cause

Put the rear panel back on and reconnect the vent. Here's the critical part everyone misses: thermal limiters don't blow for no reason. Before you run a load, check your entire vent system for restrictions. Pull off the exterior vent hood and look for lint buildup. A partially blocked vent is what killed your original limiter. I've seen 4-foot sections of vent pipe packed solid with lint. If you don't fix the airflow issue, you'll be replacing this limiter again in six months.

Testing After Installation

Plug the dryer back in. Run it empty on high heat for 5 minutes. The dryer should heat normally and not shut off. Open the rear panel while it's running (carefully, it'll be warm) and feel the air coming off the blower — it should be hot but not scorching. If the dryer's running cooler than before, that's actually normal. The new limiter is protecting properly. Check your exterior vent — you should feel strong, consistent airflow.

Frequently Asked Questions

Why did my thermal limiter blow in the first place?

Restricted airflow, always. Either your vent line is clogged with lint, the exterior vent flapper is stuck closed, or the blower wheel is packed with debris. The thermal limiter is a one-time safety device — when temperatures exceed 220°F inside the heating chamber, it blows to prevent a fire. Fix the airflow problem or the new one will blow too.

Can I test if the old thermal limiter is actually bad?

Yes. Set your multimeter to continuity or resistance mode. Touch one probe to each terminal on the limiter. A good limiter shows continuity (beep or near-zero ohms). A blown limiter shows infinite resistance (no beep, OL on display). But honestly, if your dryer won't start or heat, and everything else checks out, just replace it. They're $11 and testing takes as long as replacing.

Will this part work on my Kenmore or Electrolux dryer?

If your model number matches the compatibility list, yes. This thermal limiter appears in dozens of Frigidaire-manufactured dryers sold under multiple brand names. The part number 134120900 supersedes older numbers like 5303209192 and AP2108182. Check your model number against the full compatibility list — if it's there, you're good. The physical mounting and electrical connections are identical across all compatible models.