L250-80 Thermal Cutout (High‑Limit Thermostat) – What Part Fixes This Problem?
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Understanding the Problem
What L250-80 is and why it matters: The L250-80 is a temperature safety device commonly used as a high‑limit thermostat or thermal cutout in electric and gas dryers. Its job is to open the circuit when the dryer reaches an unsafe temperature (protecting the heater, drum, and home from overheating). When it fails open or is tripped, the dryer may stop producing heat or will heat briefly then go cold. Step‑by‑step diagnostics and repair (tools: multimeter, screwdrivers, nut driver, needle‑nose pliers, replacement L250-80 with identical ratings, caution gloves): 1) Safety first: Unplug the dryer (or shut off gas and unplug for gas dryers). Confirm power is off. 2) Inspect the venting: Remove the dryer vent hose from the back and check for lint restriction. A restricted vent causes overheating and often blows the L250-80. Clear lint before further testing. 3) Locate the L250-80: On most models it’s mounted on the heater housing or blower housing — usually a small rectangular/round snap thermostat or fuse with two spade terminals. Remove the back panel or front access panel per your model to reach it. 4) Visual check: Look for burned or melted plastic, discolored mounting, or a broken body. If visibly damaged, replacement is likely required. 5) Continuity test: Set a multimeter to continuity or ohms. With power still disconnected, disconnect the wires from the L250-80 and test across the two terminals. A good L250-80 should show near 0 ohms (closed) when cold. If it reads open/infinite resistance, it has failed and must be replaced. 6) Check related components before replacing: A shorted heating element or blocked vent commonly causes repeated L250-80 failures. Test the heating element for continuity and for short to ground (element terminal to metal housing should be open). Verify the cycling thermostat, thermal fuses, and blower are functioning and that the vent is clear. 7) Replace the L250-80: Remove the mounting screw or clip holding the part. Pull off the two spade connectors (note their positions or take a photo). Install the new L250-80 with the same orientation and temperature rating, reconnect spade terminals, re‑mount, and reassemble the dryer. 8) Power up and test: Reconnect power (and gas if applicable). Run the dryer empty on a timed cycle and measure airflow and temperature. Ensure the dryer heats and does not overheat. Check vent airflow from the outside vent outlet. Practical repair notes: Always replace with a part that has the identical temperature trip rating and physical fit. If the new L250-80 opens again quickly, stop — you have a root cause (usually blocked vent, failed element shorting to ground, or malfunctioning cycling thermostat) that must be fixed or the new cutout will be sacrificed. Safety note: Never bypass or jumper the L250-80. It’s a critical safety device designed to prevent fire. Replacing or testing must be done with the dryer disconnected from power and, for gas dryers, with the gas supply off when accessing components.
Common Symptoms
Dryer runs but no heat; dryer heats briefly then shuts off and won’t heat again; dryer trips out on thermal protection; repeated failure of replacement limits due to an underlying cause.
Common Causes
- Failed/open L250-80 high‑limit thermostat/thermal fuse
- Restricted/blocked venting causing overheating and tripping the cutout
- Shorted or grounded heating element or faulty cycling thermostat causing overheating
Popular Parts That Fix This Problem
These are the most common replacement parts that fix this problem. When you're ready to order, click below to find the right part at ProsourceParts.com — just search by your appliance model number for a guaranteed fit.
Helpful Repair Tip
With the dryer cold and unplugged, remove the two spade wires and test for continuity across the L250-80. If the meter shows open/infinite resistance, the part is bad. Also inspect the vent and heating element — a blocked vent or shorted element is a common reason these limits fail.
Frequently Asked Questions
Can I jumper or bypass the L250-80 to make the dryer heat?
No. Do not bypass the L250-80. It is a safety device that prevents overheating and potential fires. Bypassing it risks damage, voids warranties, and creates a fire hazard. Replace the part with an identical rating and correct type instead.
How much does it cost and how long does replacement take?
The L250-80 itself is inexpensive (typically a few dollars to $20 depending on supplier). Labor for a competent DIYer is 20–45 minutes if you have basic tools and access to the part. If the real cause is a blocked vent or failed heating element, diagnosing and fixing those can add time and cost.
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