Gary O Sloansville , NY October 04, 2016 Appliance: Model LWHD1800RY7 Air conditioner wasn't cooling I purchased a thermocouple in hopes that it is the problem. Probably will not know for sure until next summer. With a little studying of the unit it wasn't terribly difficult to replace. Part arrived quickly. It is a large unit 18,000 but which is 10 years old. Sliding the unit out on to a couple of saw horses was the most challenging part. Read More... Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes Tools: Screwdrivers