LG DLGX3701V Thermostat Problems – What Part Fixes This Dryer Heating Issue?
Need the replacement part? Search your model number at for guaranteed fit and fast free shipping.
Understanding the Problem
On the LG DLGX3701V dryer the thermostats (cycling thermostat and high-limit thermostat) regulate the dryer’s temperature and protect it from overheating. If a thermostat fails open the dryer may not heat at all or it may only produce weak/intermittent heat. If a thermostat fails closed or the high-limit trips, the dryer can overheat, run hot, or shut off unpredictably. Many heating problems attributed to the thermostat are actually caused by a combination of issues — a clogged vent that causes the thermostat to trip, a defective thermal fuse (which is a one-time safety device), or faulty gas valve coils (on gas models). Proper diagnosis means visually inspecting the venting, checking continuity on thermostats/thermal fuse with a multimeter, and confirming correct part numbers for replacement before ordering.
Common Symptoms
No heat, intermittent heating, dryer overheats then shuts off, dryer trips thermal fuse, or dryer cycles erratically between hot and cold.
Common Causes
- Cycling thermostat has failed open or has drifted out of spec causing no or intermittent heat.
- High‑limit thermostat (overheat thermostat) is shorted/failed or cycling because of vent blockage/poor airflow, causing shutdowns or overheating.
- Thermal fuse has blown due to an overtemperature event or restricted venting; gas valve coils or igniter issues can also mimic thermostat faults on gas dryers.
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 PartsDiscount.com — just search by your appliance model number for a guaranteed fit.
Helpful Repair Tip
With the dryer completely powered off, remove the back or front panel and test each thermostat and the thermal fuse for continuity with a multimeter when cold — a good thermostat/thermal fuse should show continuity; a failed (open) thermostat will read OL/∞.
Frequently Asked Questions
Can I replace the thermostat on an LG DLGX3701V myself?
Yes, a competent DIYer can replace the thermostat, but follow safety steps: disconnect power (and gas for gas models), unplug dryer, access the thermostat(s) by removing the back or front panel, note wire locations or take photos, remove and replace the faulty thermostat, then reassemble. Always use the exact OEM part number for your model and test the dryer after repair. If you're not comfortable working with electrical components or gas appliances, hire a qualified technician.
How much does thermostat replacement typically cost?
Replacement thermostat parts for LG dryers are inexpensive—usually in the $10–$40 range depending on part and supplier. If you hire a technician, expect additional labor costs typically between $75–$150 depending on local rates. If a thermal fuse, multiple thermostats, or gas valve coils are also faulty, parts and labor will increase accordingly. Always verify the correct part number for your exact model before purchasing.
Real DIY Repair Stories
Be the first to share your repair story!
Share Your Repair Story
Your experience helps other homeowners fix their appliances. Tell us how it went!
Can't Fix It Yourself? Find a Local Technician
It's perfectly okay to call a professional. Some repairs require specialized tools, deep teardowns, or dealing with complex systems that are better left to the pros.
Find the Right Part for Your Appliance
Don't guess — search your exact appliance model number at PartsDiscount.com to find the correct OEM compatible replacement part. They offer fast free shipping, guaranteed fit, and thousands of parts in stock.
Your Free Parts Videos
Whether your dishwasher won't drain, your dryer stopped heating, or your fridge isn't cold, we've created simple repair guides for the most common appliance problems homeowners face. Each guide explains what's going wrong, the most likely causes, and which replacement parts fix the issue. When you're ready to order, we link directly to PartsDiscount.com where you can search by model number and get the right part shipped fast.