Question about Dryers
I have checked the standard problems.. everything seems to have the proper ohms resistance...except for the Thermal cutoff... The hi limit thermostat has resistance but the thermal cutoff does not.. reads at infinity at room temp. Is replacing the thermal cutoff the simple solution to my problem?
Your Thermal Cut-Out (TCO) is blown. It should read close to 0 ohms if good. In addition, it is highly recommended that you replace the Hi-Limit Thermostat along with the TCO. These parts are commonly sold as a set. Failure to do so can result in premature failure of both parts.
BEFORE you replace anything make sure you check your dryer ventilation for clogs. Cleaning the lint screen is not enough as no lint screen captures 100 percent of the lint. Some lint always manages to end up in the vent line. This includes the blower fan housing INSIDE the dryer. Most dryer heat related problems are caused by clogged ventilation, leading to an overheat condition. In an overheat condition, the TCO will blow.
Some things to consider:
1. Are you pushing the dryer too far up against the wall? This lead to crushed or kinked dryer vent hoses which will result in overheating. Leave about a foot space between the back of the dryer and the wall to prevent this.
2. Does your dryer vent line run through an attic or crawl space? These types of configurations are notorious for creating choke points where lint can clog. This is either due to gravity in an attic configuration. Or, sags and kinks in a crawl space configuration. Frequent inspection and cleaning may be required.
3. Is your vent line excessively long? This can cause lint to back up because there isn't enough force from the blower fan to push it all out of the vent exhaust. The rule of thumb is: The SHORTER and STRAIGHTER a vent line, the BETTER.
I'm not trying to lecture you on something that may not be a problem with your dryer. I merely put this advice out as a precautionary to prevent you from purchasing parts, only to have them go bad prematurely because you weren't advised of what may be causing the problem. The TCO blows for a REASON. The reason is generally caused by an overheat condition. You need to figure out why.
I hope you find this information helpful. Let me know if you require additional assistance.
Posted on Nov 25, 2008
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